Qureos Mentor

Ruby Labs

<div><h1 class="jobSectionHeader">About us</h1>
Ruby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer-led products, and we're always looking for passionate individuals to join us. Learn more about our story at: https://rubylabs.com/about-us/<h1 class="jobSectionHeader">
About the role</h1>
At RubyLabs we&rsquo;re hiring a Senior Backend Engineer to help design, build, and scale the core backend systems that power our AI product Use.ai. This is a high-ownership role for an engineer who loves solving distributed systems challenges and driving both feature delivery and infrastructure excellence. This position requires close collaboration with our development team to ensure consistency, quality, and alignment across all projects.<h1 class="jobSectionHeader">
Key Responsibilities</h1><ul><li>
Bring 8+ years of overall professional experience, ideally including lead-level experience on the position of Lead Backend Developer.</li><li>
Deliver new backend features with a focus on scalability, performance, and reliability.</li><li>
Maintain, optimize, and improve existing services and infrastructure.</li><li>
Design, deploy, and operate backend services across AWS, Cloudflare, and other environments.</li><li>
Implement and evolve monitoring and observability using tools such as Sentry, OpenTelemetry (OTel), logging, alerting, and related platforms.</li><li>
Investigate and resolve production issues across distributed systems.</li><li>
Write clean, maintainable code aligned with SOLID principles, system design, and backend best practices.</li><li>
Lead incident investigations, root cause analysis, and system reliability improvements.</li><li>
Contribute to architectural decisions, documentation, and infrastructure planning.</li><li>
Collaborate with high standards for communication, ownership, and delivery.</li></ul><h1 class="jobSectionHeader">
Qualifications</h1><ul><li>
Deep expertise in distributed systems, system design, and backend architecture.</li><li>
Strong understanding of database fundamentals, indexing, consistency, replication, transactions, and storage trade-offs.</li><li>
Proven ability to design scalable and resilient systems.</li><li>
Fluency in Node.js backend development.</li><li>
Strong grasp of software engineering principles, including SOLID.</li><li>
Experience debugging complex issues in production environments.</li><li>
Experience with cloud infrastructure (AWS) and backend service deployment.</li><li>
Experience implementing monitoring and observability using tools such as Sentry and OpenTelemetry (OTel), including tracing, logging, and alerting.</li><li>
High standards for code quality, reliability, and communication.</li><li>
Deep knowledge of Redis, including caching, pub/sub, queues, replication, persistence, and performance tuning.</li><li>
Strong experience with AWS services, including compute, serverless, networking, storage, security, and infrastructure-as-code.</li><li>
Experience with Cloudflare Workers, edge routing, caching, and security primitives.</li><li>
Familiarity with Sentry performance monitoring and OpenTelemetry instrumentation at scale.</li><li>
Comfortable working in timezone &plusmn;2 hours from UK time.</li></ul><h1 class="jobSectionHeader"> 
Nice to have</h1><ul><li>
Experience working in startup environments or small, high-autonomy engineering teams.</li><li>
Passion for building and improving infrastructure, developer experience, and observability.</li></ul><h1 class="jobSectionHeader">
Location</h1>
Ruby Labs operates within the CET (Central European Time) zone. Applicants from any country are welcome to apply for the position as long as they are located within approximately &plusmn; 4 hours of CET. This ensures optimal collaboration and communication during working hours.<h1 class="jobSectionHeader">
Benefits</h1>
Discover the perks of being part of our vibrant team! We offer:<ul><li>
Remote Work Environment: Embrace the freedom to work from anywhere, anytime, promoting a healthy work-life balance.
</li><li>Unlimited PTO: Enjoy unlimited paid time off to recharge and prioritize your well-being, without counting days.
</li><li>Paid National Holidays: Celebrate and relax on national holidays with paid time off to unwind and recharge.
</li><li>Company-provided MacBook: Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them.
</li><li>Flexible Independent Contractor Agreement: Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities. Benefit from tax advantages, networking opportunities, reduced employment obligations, and the freedom to work from anywhere. Read more about it here: https://docs.google.com/document/d/1tzxGX4Uu7Ts_HCLFXESKLnKaaBfVCPf1f9AYZPrkjJM/preview?tab=t.0</li></ul>
Be part of our fast-growing team and seize this excellent opportunity for personal and professional growth!<h1 class="jobSectionHeader">
Interview Process</h1>
After submitting your application, we conduct a thorough review which typically takes 3 to 5 days, but may occasionally take longer due to the volume of applications received. If we see a potential fit, we proceed with the following steps:<ul><li>
Recruiter Screening (40 minutes)</li><li>
First Interview (30 minutes)</li><li>
Technical Interview (45 minutes)</li><li>
Final Interview (30 minutes)</li></ul><h1 class="jobSectionHeader">
Life at Ruby Labs</h1>
At Ruby Labs, we move fast, aim high, and expect the same from our team. We&rsquo;re not here to play small&mdash;we&rsquo;re here to build, grow, and win. That means we look for people who are ambitious, driven, and ready to give their best every single day.
This is a place for individuals who thrive under pressure, embrace challenges, and see opportunity in every obstacle. If you&rsquo;re hungry to achieve, motivated by impact, and want to grow at the speed of your own ambition, Ruby Labs offers the platform to make it happen.
Here, effort is matched with reward. We recognize those who go all in and deliver results, and we create space for people who want more&mdash;more responsibility, more growth, and more success.
#LI-Remote</div>

Senior Backend Engineer

<div><h1 class="jobSectionHeader">About us</h1>
Ruby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer-led products, and we're always looking for passionate individuals to join us. Learn more about our story at: https://rubylabs.com/about-us/<h1 class="jobSectionHeader">
About the role</h1>
At RubyLabs we&rsquo;re looking for a Lead React Native Developer to join our growing engineering team and help lead our expansion into mobile. This is a role for someone who cares deeply about product quality, enjoys solving architectural challenges, and wants ownership over real features that users rely on.
You&rsquo;ll play a key role in building and scaling our mobile applications, shaping the future of our mobile offering, and collaborating closely with backend and product teams to deliver a seamless, reliable, and high-performance user experience.<h1 class="jobSectionHeader">
Key Responsibilities</h1><ul><li>
Lead the development and delivery of new mobile product features.</li><li>
Maintain and improve the existing React Native codebase, performance, and stability.</li><li>
Define and evolve mobile architecture, system design, and technical strategy.</li><li>
Partner with backend, product, and design teams to shape solutions that scale.</li><li>
Drive reliability, performance, and observability standards on mobile.</li><li>
Own production debugging, incident investigation, and root cause analysis.</li><li>
Guide improvements in build systems, CI/CD, releases, testing, and app store deployments.</li><li>
Mentor engineers and foster a culture of quality, ownership, and execution.</li><li>
Support hiring and help grow a world-class mobile engineering team.</li><li>
Champion performance across rendering, navigation, latency, memory, offline behavior, caching, and real-time experiences.</li><li>
Lead with accountability for failure cases, API degradation, recovery UX, and resilience.</li></ul><h1 class="jobSectionHeader">
Qualifications</h1><ul><li>
5+ years of experience building mobile applications, with significant React Native experience.</li><li>
2+ years in a technical leadership, lead, or architect role.</li><li>
Experience mentoring engineers through code reviews, architecture, and incident response.</li><li>
Strong understanding of mobile system design, component architecture, state management, navigation patterns, and performance trade-offs.</li><li>
Experience optimizing UI performance, memory usage, rendering efficiency, and startup time.</li><li>
Deep knowledge of React internals and rendering behavior (hooks, reconciliation, lifecycle, render cost).</li><li>
Experience working with native modules and iOS/Android bridging.</li><li>
Shipped and maintained apps on the App Store and Google Play.</li><li>
Experience with CI/CD, builds, release automation, and OTA updates (EAS, CodePush, or similar).</li><li>
Experience implementing monitoring and observability (Sentry, OpenTelemetry, crash reporting, performance tracing).</li><li>
Demonstrated ownership of edge cases, distributed failure modes, degraded APIs, offline sync, and recovery UX.</li><li>
Demonstrated ability to lead architecture or technical strategy for a mobile app or major feature.</li><li>
Maintains high standards for clean code, SOLID principles, maintainability, and documentation.</li><li>
Proven experience leading and mentoring mobile engineers.</li><li>
Proven ownership of technical strategy or architecture for mobile apps or features.</li><li>
Proven ability to coach others and raise the bar across a team.</li><li>
Leads cross-team alignment during ambiguity or incidents.</li></ul><h1 class="jobSectionHeader">
Nice to have</h1><ul><li>
Experience in startup or high-ownership product teams.</li><li>
Experience scaling real-time or multi-region mobile architectures.</li><li>
Experience designing or building design systems, shared component libraries, or mobile platform foundations.</li><li>
Experience improving mobile security, analytics, performance profiling, and release automation.</li><li>
Knowledge of edge caching, streaming real-time events, WebSockets, or offline-first architectures.</li></ul><h1 class="jobSectionHeader">
Location</h1>
Ruby Labs operates within the CET (Central European Time) zone. Applicants from any country are welcome to apply for the position as long as they are located within approximately &plusmn; 4 hours of CET. This ensures optimal collaboration and communication during working hours.<h1 class="jobSectionHeader">
Benefits</h1>
Discover the perks of being part of our vibrant team! We offer:<ul><li>
Remote Work Environment: Embrace the freedom to work from anywhere, anytime, promoting a healthy work-life balance.
</li><li>Unlimited PTO: Enjoy unlimited paid time off to recharge and prioritize your well-being, without counting days.
</li><li>Paid National Holidays: Celebrate and relax on national holidays with paid time off to unwind and recharge.
</li><li>Company-provided MacBook: Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them.
</li><li>Flexible Independent Contractor Agreement: Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities. Benefit from tax advantages, networking opportunities, reduced employment obligations, and the freedom to work from anywhere. Read more about it here: https://docs.google.com/document/d/1tzxGX4Uu7Ts_HCLFXESKLnKaaBfVCPf1f9AYZPrkjJM/preview?tab=t.0</li></ul>
Be part of our fast-growing team and seize this excellent opportunity for personal and professional growth!<h1 class="jobSectionHeader">
Interview Process</h1>
After submitting your application, we conduct a thorough review which typically takes 3 to 5 days, but may occasionally take longer due to the volume of applications received. If we see a potential fit, we proceed with the following steps:<ul><li>
Recruiter Screening (40 minutes)</li><li>
First Interview (30 minutes)</li><li>
Technical Interview (45 minutes)</li><li>
Final Interview (30 minutes)</li></ul><h1 class="jobSectionHeader">
Life at Ruby Labs</h1>
At Ruby Labs, we move fast, aim high, and expect the same from our team. We&rsquo;re not here to play small&mdash;we&rsquo;re here to build, grow, and win. That means we look for people who are ambitious, driven, and ready to give their best every single day.
This is a place for individuals who thrive under pressure, embrace challenges, and see opportunity in every obstacle. If you&rsquo;re hungry to achieve, motivated by impact, and want to grow at the speed of your own ambition, Ruby Labs offers the platform to make it happen.
Here, effort is matched with reward. We recognize those who go all in and deliver results, and we create space for people who want more&mdash;more responsibility, more growth, and more success.
#LI-Remote</div>

Lead React Native Developer

<div><h1 class="jobSectionHeader">About us</h1>
Ruby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer-led products, and we're always looking for passionate individuals to join us. Learn more about our story at: https://rubylabs.com/about-us/<h1 class="jobSectionHeader">
About the role</h1>
We are hiring a Lead Data Analyst to own, lead, and evolve our analytics function across product, marketing, and business performance. This role goes far beyond reporting &mdash; you will define how success is measured, enforce metric discipline, and drive decision-making with absolute clarity and accountability.
You will lead by example, set standards for analytical excellence, and push the team to operate at a high-performance, execution-first level. We are seeking an individual with exceptional leadership skills, a strong competitive mindset (a sports or performance background is a significant advantage), and the ability to approach product metrics with rigorous precision.
This role is critical to the company&rsquo;s growth and requires someone who owns outcomes, not just insights.<h1 class="jobSectionHeader">
Key Responsibilities</h1><ul><li>
Own the entire analytics vision and execution across product, marketing, and revenue.</li><li>
Lead, mentor, and challenge Data Analysts &mdash; raising the bar on analytical thinking, ownership, and speed.</li><li>
Define, standardize, and strictly enforce product and business KPIs across the organization.</li><li>
Build, maintain, and evolve executive-level dashboards used for real decision-making, not vanity metrics.</li><li>
Perform deep user behavior analysis, funnel analysis, retention analysis, and aha moment discovery.</li><li>
Translate complex data into clear, decisive recommendations for Product, Growth, and Leadership.</li><li>
Establish a culture of metric accountability &mdash; every feature, experiment, and campaign must be measurable.</li><li>
Design and own robust SQL-based data models that scale with the business.</li><li>
Proactively monitor metrics, detect anomalies, and act before issues become visible elsewhere.</li><li>
Partner closely with Product Owners, Engineering, Marketing, and Leadership to align data with strategy.</li><li>
Give and receive direct, actionable feedback.</li><li>
Act as the single point of ownership for product and business metrics.</li><li>
Push the team forward with discipline, clarity, and high standards.</li><li>
Demand precision, consistency, and accountability in all reporting and analysis.</li><li>
Be comfortable making unpopular calls when data demands it.</li><li>
Operate with a performance mindset &mdash; speed, focus, and results matter.</li><li>
Treat metrics like a control system, not a reporting layer.</li></ul><h1 class="jobSectionHeader">
Qualifications</h1><ul><li>
Degree in an analytical field (Math, Data Science, Economics, or similar).</li><li>
5+ years of experience in Data Analytics, including leading or mentoring analysts.</li><li>
Strong background in Product Analytics and data-driven decision-making.</li><li>
Advanced SQL skills with proven experience building scalable, reliable data models.</li><li>
Hands-on experience with Mixpanel, GA4, Amplitude, or similar tools.</li><li>
Experience with BI tools such as Tableau, Looker, or equivalent.</li><li>
Exceptional analytical and problem-solving skills with the ability to see both details and the big picture.</li><li>
Excellent verbal and written communication &mdash; able to challenge stakeholders with confidence.</li><li>
Ability to operate in a fast-paced, high-pressure environment with a full ownership mindset.</li><li>
Experience in subscription-based or data-driven businesses.</li></ul><h1 class="jobSectionHeader">
Nice to have</h1><ul><li>
Background in sports, competitive environments, or high-performance teams.</li><li>
Experience in Marketing Analytics (Google Ads, Facebook Ads, attribution).</li><li>
Experience with Python or R for advanced analysis.</li><li>
Experience with GCP / BigQuery / ClickHouse.</li><li>
Familiarity with dbt, Airflow, or modern data stacks.</li><li>
Experience with Git and code review processes.</li></ul><h1 class="jobSectionHeader">
Location</h1>
Ruby Labs operates within the CET (Central European Time) zone. Applicants from any country are welcome to apply for the position as long as they are located within approximately &plusmn; 4 hours of CET. This ensures optimal collaboration and communication during working hours.<h1 class="jobSectionHeader">
Benefits</h1>
Discover the perks of being part of our vibrant team! We offer:<ul><li>
Remote Work Environment: Embrace the freedom to work from anywhere, anytime, promoting a healthy work-life balance.
</li><li>Unlimited PTO: Enjoy unlimited paid time off to recharge and prioritize your well-being, without counting days.
</li><li>Paid National Holidays: Celebrate and relax on national holidays with paid time off to unwind and recharge.
</li><li>Company-provided MacBook: Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them.
</li><li>Flexible Independent Contractor Agreement: Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities. Benefit from tax advantages, networking opportunities, reduced employment obligations, and the freedom to work from anywhere. Read more about it here: https://docs.google.com/document/d/1tzxGX4Uu7Ts_HCLFXESKLnKaaBfVCPf1f9AYZPrkjJM/preview?tab=t.0</li></ul>
Be part of our fast-growing team and seize this excellent opportunity for personal and professional growth!<h1 class="jobSectionHeader">
Interview Process</h1>
After submitting your application, we conduct a thorough review which typically takes 3 to 5 days, but may occasionally take longer due to the volume of applications received. If we see a potential fit, we proceed with the following steps:<ul><li>
Recruiter Screening (40 minutes)</li><li>
Technical Interview (90 minutes)</li><li>
Final Interview (30 minutes)</li></ul><h1 class="jobSectionHeader">
Life at Ruby Labs</h1>
At Ruby Labs, we move fast, aim high, and expect the same from our team. We&rsquo;re not here to play small&mdash;we&rsquo;re here to build, grow, and win. That means we look for people who are ambitious, driven, and ready to give their best every single day.
This is a place for individuals who thrive under pressure, embrace challenges, and see opportunity in every obstacle. If you&rsquo;re hungry to achieve, motivated by impact, and want to grow at the speed of your own ambition, Ruby Labs offers the platform to make it happen.
Here, effort is matched with reward. We recognize those who go all in and deliver results, and we create space for people who want more&mdash;more responsibility, more growth, and more success.
#LI-Remote</div>

Lead Data Analyst

<div><h1 class="jobSectionHeader">About us</h1>
Ruby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer-led products, and we're always looking for passionate individuals to join us. Learn more about our story at: https://rubylabs.com/about-us/<h1 class="jobSectionHeader">
About the role</h1>
At RubyLabs, we&rsquo;re seeking a senior AI Engineer (Node.js / Next.js / TypeScript) to shape our AI infrastructure and drive production-ready LLM experiences. You&rsquo;ll work in a modern stack, making data-driven decisions around model performance, reliability, and cost.
You&rsquo;ll own advanced prompt systems, structured outputs, and complex LLM workflows using LangChain or LlamaIndex. Observability, debugging, and evaluation are core to the role, leveraging Langfuse and AI gateways like OpenRouter to continuously improve model quality and operational efficiency. You&rsquo;ll take full ownership of key AI features from experimentation to live production.<h1 class="jobSectionHeader">
Key Responsibilities</h1><ul><li>
Advanced Prompt Engineering: Designing complex, dynamic prompt templates with conditional logic and efficiently reusing information and context within prompts to maximize generation quality and reasoning.</li><li>
Structured Outputs &amp; Schemas: Implementing various response schemes (JSON mode, function calling, Zod/JSON schemas) to ensure AI outputs are predictable and ready for seamless integration into application logic.</li><li>
Prompt Engineering &amp; Evaluations: Building robust evaluation pipelines and using Langfuse to collect feedback and score the quality of responses in real time.</li><li>
Tracing &amp; Debugging: Performing deep debugging of complex LLM chains using Langfuse traces to identify bottlenecks and optimize for cost, latency, and context window usage.</li><li>
AI A/B Testing: Running systematic experiments across different models via OpenRouter (e.g., comparing Claude 3.5 Sonnet vs. GPT-4o) and analyzing results based on quantitative metrics.</li><li>
Data-Driven Decisions: Making deployment decisions for new prompts or models strictly based on quantitative benchmarks and trace data, rather than intuition.</li><li>
Output Scoring &amp; Analysis: Developing scoring systems to analyze the &ldquo;Problem Solution&rdquo; chain and identify root causes of hallucinations or logic errors using Langfuse analytics.</li><li>
Model Performance &amp; Fine-Tuning: Regularly re-evaluating model performance as new architectures emerge and performing fine-tuning when necessary to meet specific domain requirements.</li></ul><h1 class="jobSectionHeader">
Qualifications</h1><ul><li>
Node.js &amp; Next.js: Deep knowledge of the stack to build reliable services and handle complex LLM-generated data.</li><li>
Dynamic Prompting Skills: Proven experience in building prompts where content is highly dependent on input variables and context injection.</li><li>
OpenRouter Experience: Experience working with unified APIs, managing rate limits, and selecting the most cost-effective models for specific tasks.</li><li>
Langfuse (or similar): Understanding of LLM observability principles &mdash; setting up tracing, creating test datasets, and integrating scoring systems.</li><li>
Evaluation Methodology: Experience with frameworks like RAGAS or building custom &ldquo;LLM-as-a-judge&rdquo; systems.</li><li>
Analytical Mindset: Ability to transform raw generation logs into actionable business metrics and technical insights.</li><li>
Iterative Mindset: Focus on continuous product improvement through constant feedback loops.</li></ul><h1 class="jobSectionHeader">
Nice to have</h1><ul><li>
Fine-Tuning: Practical experience in fine-tuning models for specific domain tasks or JSON compliance.</li><li>
RAG Architecture: Understanding how to build and optimize Retrieval-Augmented Generation systems, including indexing, retrieval, and re-ranking.</li><li>
Python: Basic knowledge for working with data science scripts or AI evaluation libraries.</li></ul><h1 class="jobSectionHeader">
Location</h1>
Ruby Labs operates within the CET (Central European Time) zone. Applicants from any country are welcome to apply for the position as long as they are located within approximately &plusmn; 4 hours of CET. This ensures optimal collaboration and communication during working hours.<h1 class="jobSectionHeader">
Benefits</h1>
Discover the perks of being part of our vibrant team! We offer:<ul><li>
Remote Work Environment: Embrace the freedom to work from anywhere, anytime, promoting a healthy work-life balance.
</li><li>Unlimited PTO: Enjoy unlimited paid time off to recharge and prioritize your well-being, without counting days.
</li><li>Paid National Holidays: Celebrate and relax on national holidays with paid time off to unwind and recharge.
</li><li>Company-provided MacBook: Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them.
</li><li>Flexible Independent Contractor Agreement: Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities. Benefit from tax advantages, networking opportunities, reduced employment obligations, and the freedom to work from anywhere. Read more about it here: https://docs.google.com/document/d/1tzxGX4Uu7Ts_HCLFXESKLnKaaBfVCPf1f9AYZPrkjJM/preview?tab=t.0</li></ul>
Be part of our fast-growing team and seize this excellent opportunity for personal and professional growth!<h1 class="jobSectionHeader">
Interview Process</h1>
After submitting your application, we conduct a thorough review which typically takes 3 to 5 days, but may occasionally take longer due to the volume of applications received. If we see a potential fit, we proceed with the following steps:<ul><li>
Recruiter Screening (40 minutes)</li><li>
Technical Interview (60 minutes)</li><li>
Final Interview (30 minutes)</li></ul><h1 class="jobSectionHeader">
Life at Ruby Labs</h1>
At Ruby Labs, we move fast, aim high, and expect the same from our team. We&rsquo;re not here to play small&mdash;we&rsquo;re here to build, grow, and win. That means we look for people who are ambitious, driven, and ready to give their best every single day.
This is a place for individuals who thrive under pressure, embrace challenges, and see opportunity in every obstacle. If you&rsquo;re hungry to achieve, motivated by impact, and want to grow at the speed of your own ambition, Ruby Labs offers the platform to make it happen.
Here, effort is matched with reward. We recognize those who go all in and deliver results, and we create space for people who want more&mdash;more responsibility, more growth, and more success.
#LI-Remote</div>

AI Engineer

<div><h1 class="jobSectionHeader">About us</h1>
Ruby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer-led products, and we're always looking for passionate individuals to join us. Learn more about our story at: https://rubylabs.com/about-us/<h1 class="jobSectionHeader">
About the role</h1>
Ruby Labs is looking for an experienced Full-Stack Engineer (Next.js / Node.js) to join one of its portfolio companies, a leading provider of payment solutions. This role is ideal for a hands-on technical leader who enjoys balancing system design, people leadership, and active product development.
You will be responsible for shaping the technical architecture, guiding a team of engineers, and contributing directly to the development of scalable, secure, and high-performance applications. Working closely with product, analytics, and business stakeholders, you will help drive technical decisions that support growth, experimentation, and continuous improvement.
We are seeking someone with a strong engineering mindset, a passion for mentorship, and the ability to align technical execution with real business impact in a fast-paced, product-driven environment.<h1 class="jobSectionHeader">
Key Responsibilities</h1><ul><li>
Technical Leadership: Design system architecture, define the technology stack, and make key technical decisions for our projects.</li><li>
Team Management: Mentor, coach, and motivate a team of developers through regular 1-on-1s, constructive code reviews, and career growth planning.</li><li>
FullStack Development: Take an active, hands-on role in developing complex features and modules using Next.js for the frontend and NodeJS for the backend.</li><li>
Process Management: Implement and optimize Agile methodologies (Scrum/Kanban), including sprint planning, task estimation, and delivery oversight.</li><li>
Quality Assurance: Enforce best practices in coding, testing, caching, and performance monitoring to ensure a robust and scalable application.</li><li>
Security: Design and implement comprehensive security measures at the application, infrastructure, and data levels.</li><li>
Analytics &amp; Optimization: Collaborate closely with the product team to integrate analytics systems and conduct A/B tests to enhance the user experience.</li><li>
Innovation: Research and integrate emerging technologies, particularly AI-driven solutions, to improve the product and streamline development workflows.</li></ul><h1 class="jobSectionHeader">
Qualifications</h1><ul><li>
Next.js: Minimum 2 years active commercial experience (v14.x/v15.x), with at least two recent projects using Next.js as the primary frontend framework.</li><li>
NodeJS: At least 3 years hands-on with modern frameworks (NestJS, Fastify, Hono), with solid understanding of their architectural trade-offs.</li><li>
Databases: Strong PostgreSQL/Supabase skills, including query optimization and schema design.</li><li>
ORM: Expert in Prisma or Drizzle ORM, building complex queries and managing migrations.</li><li>
Caching: Deep knowledge of caching strategies (in-memory, distributed, CDN) and performance optimization (e.g., Redis).</li><li>
Docker: Proficient with Docker and docker-compose for containerized apps and deployments.</li><li>
Workers &amp; Queues: Practical experience with background workers and message queues (e.g., BullMQ, RabbitMQ) for async tasks.</li><li>
Security: Experienced in secure system design, protecting against OWASP Top 10, CSP, CORS, API security, and hardened hosting.</li><li>
Analytics &amp; A/B Testing: Skilled with analytics tools (Google Analytics, PostHog, Mixpanel) and A/B testing platforms.</li><li>
Leadership: 2+ years as Team Lead/Tech Lead with direct development team responsibility.</li><li>
Mentorship: Passionate about teaching, sharing knowledge, and fostering professional growth.</li><li>
Accountability: Proactive, results-driven, takes ownership of team and product success.</li></ul><h1 class="jobSectionHeader">
Nice to have</h1><ul><li>
Experience with CI/CD pipelines (e.g., GitHub Actions, GitLab CI).</li><li>
Experience with monorepo tools (e.g., Turborepo, Nx).</li><li>
Experience writing unit and integration tests (e.g., Jest, Playwright).</li></ul><h1 class="jobSectionHeader">
Location</h1>
Ruby Labs operates within the CET (Central European Time) zone. Applicants from any country are welcome to apply for the position as long as they are located within approximately &plusmn; 4 hours of CET. This ensures optimal collaboration and communication during working hours.<h1 class="jobSectionHeader">
Benefits</h1>
Discover the perks of being part of our vibrant team! We offer:<ul><li>
Remote Work Environment: Embrace the freedom to work from anywhere, anytime, promoting a healthy work-life balance.
</li><li>Unlimited PTO: Enjoy unlimited paid time off to recharge and prioritize your well-being, without counting days.
</li><li>Paid National Holidays: Celebrate and relax on national holidays with paid time off to unwind and recharge.
</li><li>Company-provided MacBook: Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them.
</li><li>Flexible Independent Contractor Agreement: Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities. Benefit from tax advantages, networking opportunities, reduced employment obligations, and the freedom to work from anywhere. Read more about it here: https://docs.google.com/document/d/1tzxGX4Uu7Ts_HCLFXESKLnKaaBfVCPf1f9AYZPrkjJM/preview?tab=t.0</li></ul>
Be part of our fast-growing team and seize this excellent opportunity for personal and professional growth!<h1 class="jobSectionHeader">
Interview Process</h1>
After submitting your application, we conduct a thorough review which typically takes 3 to 5 days, but may occasionally take longer due to the volume of applications received. If we see a potential fit, we proceed with the following steps:<ul><li>
Recruiter Screening (40 minutes)</li><li>
Technical Interview (60 minutes)</li><li>
Final Interview (30 minutes)</li></ul><h1 class="jobSectionHeader">
Life at Ruby Labs</h1>
At Ruby Labs, we move fast, aim high, and expect the same from our team. We&rsquo;re not here to play small&mdash;we&rsquo;re here to build, grow, and win. That means we look for people who are ambitious, driven, and ready to give their best every single day.
This is a place for individuals who thrive under pressure, embrace challenges, and see opportunity in every obstacle. If you&rsquo;re hungry to achieve, motivated by impact, and want to grow at the speed of your own ambition, Ruby Labs offers the platform to make it happen.
Here, effort is matched with reward. We recognize those who go all in and deliver results, and we create space for people who want more&mdash;more responsibility, more growth, and more success.
#LI-Remote</div>

Senior Full-Stack Engineer

<div><h1 class="jobSectionHeader">About us</h1>
Ruby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer-led products, and we're always looking for passionate individuals to join us. Learn more about our story at: https://rubylabs.com/about-us/<h1 class="jobSectionHeader">
About the role</h1>
We are building and scaling a high-growth D2C product in the LegalTech / Utilities space and are looking for a Full-Stack Engineer who is driven to build high-quality, scalable products used by real users&mdash;fast.
You will be a core contributor, working across the stack and owning meaningful product areas end-to-end, while collaborating closely with product and engineering leadership. This role is ideal for someone who enjoys responsibility, moves quickly, and takes pride not only in shipping features, but in ensuring they scale and perform reliably under real-world usage.
We operate in a fast-paced, startup-style environment where speed and quality go hand in hand, and ownership is expected. If you are excited by challenge, autonomy, and rapid growth, we encourage you to read on.<h1 class="jobSectionHeader"> 
Key Responsibilities</h1><ul><li>
Build, ship and iterate on core product features using Next.js.</li><li>
Own product modules end-to-end, from implementation to production rollout and iteration.</li><li>
Implement responsive, accessible UIs using TypeScript, TailwindCSS, and established design systems.</li><li>
Work with backend services and APIs, integrating frontend logic with scalable systems.</li><li>
Participate actively in code reviews, ensuring high standards for readability, performance and reliability.</li><li>
Debug, optimize, and improve production systems in a high-traffic environment.</li><li>
Work closely with Product and Growth to support experimentation and rapid MVP cycles.</li></ul><h1 class="jobSectionHeader"> 
Qualifications</h1><ul><li>
4+ years of hands-on experience building and maintaining production-grade, full-stack web applications.</li><li>
Strong practical experience with React and Next.js, including at least 2 years working with the Next.js App Router in production environments.</li><li>
Deep understanding of TypeScript and modern frontend architecture patterns.</li><li>
Proven ability to own features end-to-end, from ambiguous requirements through to production-ready implementation.</li><li>
Solid experience with PostgreSQL, including data modeling and basic query optimization.</li><li>
Working knowledge of caching strategies and performance considerations (Redis or equivalent).</li><li>
High standards for code quality, maintainability, and readability.</li><li>
Strong proficiency with Git, Docker, and modern development workflows.</li><li>
Comfortable working with CI/CD pipelines and cloud-based environments (AWS preferred).</li><li>
Prior experience with NestJS or similar Node.js frameworks is a plus.</li></ul><ul><li>
Strong sense of ownership and initiative with accountability for outcomes.</li><li>
Clear, proactive communication in a remote, async-friendly team environment.</li><li>
A pragmatic builder who balances execution speed with long-term maintainability.</li></ul><h1 class="jobSectionHeader"> 
Nice to have</h1><ul><li>
Experience with D2C SaaS, LegalTech, or utility-style products.</li><li>
Experience with Payload (CMS) or BetterAuth (considered a strong plus).</li><li>
Familiarity with Supabase, Cloudflare R2, or billing systems.</li><li>
Exposure to performance marketing, analytics, or A/B testing.</li><li>
Open-source contributions, side projects, or a strong GitHub/portfolio.</li></ul><h1 class="jobSectionHeader"> 
Location</h1>
Ruby Labs operates within the CET (Central European Time) zone. Applicants from any country are welcome to apply for the position as long as they are located within approximately &plusmn; 4 hours of CET. This ensures optimal collaboration and communication during working hours.<h1 class="jobSectionHeader">
Benefits</h1>
Discover the perks of being part of our vibrant team! We offer:<ul><li>
Remote Work Environment: Embrace the freedom to work from anywhere, anytime, promoting a healthy work-life balance.
</li><li>Unlimited PTO: Enjoy unlimited paid time off to recharge and prioritize your well-being, without counting days.
</li><li>Paid National Holidays: Celebrate and relax on national holidays with paid time off to unwind and recharge.
</li><li>Company-provided MacBook: Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them.
</li><li>Flexible Independent Contractor Agreement: Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities. Benefit from tax advantages, networking opportunities, reduced employment obligations, and the freedom to work from anywhere. Read more about it here: https://docs.google.com/document/d/1tzxGX4Uu7Ts_HCLFXESKLnKaaBfVCPf1f9AYZPrkjJM/preview?tab=t.0</li></ul>
Be part of our fast-growing team and seize this excellent opportunity for personal and professional growth!<h1 class="jobSectionHeader">
Interview Process</h1>
After submitting your application, we conduct a thorough review which typically takes 3 to 5 days, but may occasionally take longer due to the volume of applications received. If we see a potential fit, we proceed with the following steps:<ul><li>
Recruiter Screening (40 minutes)</li><li>
Technical Interview (60 minutes)</li><li>
Final Interview (30 minutes)</li></ul><h1 class="jobSectionHeader">
Life at Ruby Labs</h1>
At Ruby Labs, we move fast, aim high, and expect the same from our team. We&rsquo;re not here to play small&mdash;we&rsquo;re here to build, grow, and win. That means we look for people who are ambitious, driven, and ready to give their best every single day.
This is a place for individuals who thrive under pressure, embrace challenges, and see opportunity in every obstacle. If you&rsquo;re hungry to achieve, motivated by impact, and want to grow at the speed of your own ambition, Ruby Labs offers the platform to make it happen.
Here, effort is matched with reward. We recognize those who go all in and deliver results, and we create space for people who want more&mdash;more responsibility, more growth, and more success.
#LI-Remote</div>

Full-Stack Engineer (LegalTech)

<div><h1 class="jobSectionHeader">About us</h1>
Ruby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer-led products, and we're always looking for passionate individuals to join us. Learn more about our story at: https://rubylabs.com/about-us/<h1 class="jobSectionHeader">
About the role</h1>
We are seeking a highly experienced Head of Affiliate Marketing to build, launch, and scale affiliate marketing from the ground up across all Ruby Labs products.
You will be responsible for creating affiliate programmes for multiple high-traffic consumer products, defining commission structures, selecting and managing affiliate platforms, recruiting and enabling partners, and ensuring robust tracking, attribution, and fraud prevention.
You will report directly to the Director of Marketing and own the affiliate marketing end-to-end. Your mission is to turn affiliate marketing into a profitable, scalable, and well-governed growth channel across Ruby Labs&rsquo; subscription products.<h1 class="jobSectionHeader">
Key Responsibilities</h1> 
Affiliate Program Strategy &amp; Ownership<ul><li>
Build and own the global affiliate marketing strategy across all Ruby Labs products.</li><li>
Launch affiliate programs from scratch for multiple brands.</li><li>
Define conversion events, attribution windows, approval logic, and payout structures per product.</li><li>
Set clear performance targets around CPA, LTV, refund rates, and incremental growth.</li><li>
Establish affiliate marketing as a core, repeatable revenue channel.</li></ul>
Platform &amp; Tracking Setup<ul><li>
Evaluate, select, and manage affiliate platforms, networks, and tracking tools.</li><li>
Own end-to-end affiliate tracking, attribution, and postback logic.</li><li>
Ensure accurate conversion tracking, commission approval flows, and refund handling.</li><li>
Proactively QA tracking integrity and resolve attribution issues.</li><li>
Work with internal technical teams where needed to ensure reliable tracking infrastructure.</li></ul>
Partner Acquisition &amp; Management<ul><li>
Recruit, onboard, and manage high-quality affiliate partners.</li><li>
Develop partner segmentation, tiering, and incentive strategies.</li><li>
Build long-term relationships with top-performing affiliates.</li><li>
Manage partner communication, onboarding, enablement, and performance optimisation.</li></ul>
Commission &amp; Offer Strategy<ul><li>
Design CPA, revenue-share, hybrid, and tiered commission models.</li><li>
Create promotional calendars, limited-time offers, and performance-based incentives.</li><li>
Continuously optimise commission structures to balance growth and profitability.</li></ul>
Fraud Prevention &amp; Compliance<ul><li>
Define and enforce affiliate program rules, policies, and compliance standards.</li><li>
Monitor traffic quality, refund rates, and chargebacks.</li><li>
Detect and prevent fraud, self-referrals, brand bidding abuse, and low-quality traffic.</li><li>
Partner with Finance and Legal when needed to manage risk and governance.</li></ul>
Reporting &amp; Performance Analysis<ul><li>
Build reporting frameworks to track affiliate performance by product, partner, and cohort.</li><li>
Analyse conversion quality, LTV, churn, and incremental impact.</li><li>
Provide regular performance updates and insights to the Director of Marketing.</li><li>
Identify scaling opportunities and risks early.</li></ul>
Process &amp; Team Building<ul><li>
Create SOPs, playbooks, and documentation for affiliate operations.</li><li>
Establish a scalable operating model for affiliate marketing.</li><li>
Hire and manage affiliate team members as the channel grows.</li></ul><h1 class="jobSectionHeader">
Qualifications</h1>
Experience<ul><li>
Minimum 5+ years of hands-on experience in Affiliate Marketing.</li><li>
Proven experience building affiliate programs from scratch.</li><li>
Experience with SaaS and/or DTC subscription products.</li><li>
Demonstrated ability to scale affiliate revenue profitably.</li></ul>
Technical &amp; Platform Expertise<ul><li>
Strong understanding of affiliate tracking, attribution models, and postback logic.</li><li>
Experience working with multiple affiliate platforms and networks.</li><li>
Comfortable with pixels, server-side tracking, conversion events, and analytics.</li><li>
Ability to independently troubleshoot tracking and attribution issues.</li></ul>
Performance &amp; Data Mindset<ul><li>
Strong analytical and commercial mindset.</li><li>
Experience managing CPA targets, refunds, churn, and LTV.</li><li>
Data-driven decision-maker with a focus on sustainable growth.</li></ul>
Leadership &amp; Ownership<ul><li>
Strong ownership mentality.</li><li>
Comfortable operating autonomously in a fast-paced environment.</li><li>
Experience building processes and scaling channels.</li></ul>
Communication<ul><li>
Excellent written and verbal communication skills in English.</li><li>
Ability to clearly communicate performance, risks, and opportunities to leadership.</li></ul><h1 class="jobSectionHeader"> 
Nice to have</h1><ul><li>
Experience managing affiliate programs across multiple brands.</li><li>
Experience with international affiliates and multi-market setups.</li><li>
Background in high-volume consumer funnels.</li></ul><h1 class="jobSectionHeader"> 
Location</h1>
Ruby Labs operates within the CET (Central European Time) zone. Applicants from any country are welcome to apply for the position as long as they are located within approximately &plusmn; 4 hours of CET. This ensures optimal collaboration and communication during working hours.<h1 class="jobSectionHeader">
Benefits</h1>
Discover the perks of being part of our vibrant team! We offer:<ul><li>
Remote Work Environment: Embrace the freedom to work from anywhere, anytime, promoting a healthy work-life balance.
</li><li>Unlimited PTO: Enjoy unlimited paid time off to recharge and prioritize your well-being, without counting days.
</li><li>Paid National Holidays: Celebrate and relax on national holidays with paid time off to unwind and recharge.
</li><li>Company-provided MacBook: Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them.
</li><li>Flexible Independent Contractor Agreement: Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities. Benefit from tax advantages, networking opportunities, reduced employment obligations, and the freedom to work from anywhere. Read more about it here: https://docs.google.com/document/d/1tzxGX4Uu7Ts_HCLFXESKLnKaaBfVCPf1f9AYZPrkjJM/preview?tab=t.0</li></ul>
Be part of our fast-growing team and seize this excellent opportunity for personal and professional growth!<h1 class="jobSectionHeader">
Interview Process</h1>
After submitting your application, we conduct a thorough review, which typically takes 3 to 5 days, but may occasionally take longer due to the volume of applications received. In the process, we proceed with the following steps:<ul><li>
Application Submission<ul><li>
CV and examples of affiliate programs built or scaled.</li><li>
Clear performance metrics where possible.</li></ul></li><li>
Recruiter Screening (40 minutes)<ul><li>
Experience, mindset, and role fit.</li></ul></li><li>
Task Assignment<ul><li>
Practical task focused on launching an affiliate program from scratch.</li></ul></li><li>
Final Interview (60 minutes)<ul><li>
Deep dive with the Director of Marketing and Founder on strategy, execution, and ownership.</li></ul></li></ul><h1 class="jobSectionHeader"> 
Life at Ruby Labs</h1>
At Ruby Labs, we move fast, aim high, and expect the same from our team. We&rsquo;re not here to play small&mdash;we&rsquo;re here to build, grow, and win. That means we look for people who are ambitious, driven, and ready to give their best every single day.
This is a place for individuals who thrive under pressure, embrace challenges, and see opportunity in every obstacle. If you&rsquo;re hungry to achieve, motivated by impact, and want to grow at the speed of your own ambition, Ruby Labs offers the platform to make it happen.
Here, effort is matched with reward. We recognize those who go all in and deliver results, and we create space for people who want more&mdash;more responsibility, more growth, and more success.
#LI-Remote</div>

Head of Affiliate Marketing

Join Ruby Labs and explore 7   exciting career opportunities. They're hiring for various roles with options for remote or on-site work. Apply today and become part of their innovative team.