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backend software engineer Jobs in Amsterdam

backend software engineer

backend engineer

Nebius

<div>
 
 
 Why work at Nebius
 
 
 
 
 
 
 Nebius is leading a new era in cloud computing to serve the global AI economy. We create the tools and resources our customers need to solve real-world challenges and transform industries, without massive infrastructure costs or the need to build large in-house AI/ML teams. Our employees work at the cutting edge of AI cloud infrastructure alongside some of the most experienced and innovative leaders and engineers in the field.
 
 
 
 
 
 
 Where we work
 
 
 
 
 
 
 Headquartered in Amsterdam and listed on Nasdaq, Nebius has a global footprint with R&amp;D hubs across Europe, North America, and Israel. The team of over 800 employees includes more than 400 highly skilled engineers with deep expertise across hardware and software engineering, as well as an in-house AI R&amp;D team.
 
 
 
 
 
 
 The role
 
 
 
 
 
 
 We&rsquo;re looking for a Senior Backend Software Engineer to help develop our hyperscaling platform. We have a lot of tasks on Golang and little less on Java and Python.
 
 
 You&rsquo;re welcome to work from our office in Prague, Berlin or in Amsterdam, hybrid or remotely.
 
 
 
 
 
 
 In this position, your responsibility will be to:
 
 
 
 Developing fault-tolerant, reliable cloud services: cloud infrastructure, managed databases, managed Kubernetes, billing, monitoring systems, ML service and more.
 
 
 
 
 
 
 We expect you to have:
 
 
 
 
 
 <ul>
 <li>
 5+ years of professional software engineering experience
 </li>
 <li>
 Excellent knowledge of Golang or you are ready to quickly switch to this programming language
 </li>
 <li>
 Ability to write reliable code and dig into complex problems
 </li>
 <li>
 Teamwork-oriented approach
 </li>
 </ul>
 
 
 
 
 
 It would be an added bonus if you had:
 
 
 <ul>
 <li>
 Experience designing high-load and scaling services
 </li>
 </ul>
 
 
 
 
 
 We conduct coding interviews as part of the process.
 
 
 
 
 
 
 
 What we offer
 
 
 
 
 
 <ul>
 <li>
 Competitive salary and comprehensive benefits package.
 </li>
 <li>
 Opportunities for professional growth within Nebius.
 </li>
 <li>
 Flexible working arrangements.
 </li>
 <li>
 A dynamic and collaborative work environment that values initiative and innovation.
 </li>
 </ul>
 
 
 
 
 We&rsquo;re growing and expanding our products every day. If you&rsquo;re up to the challenge and are excited about AI and ML as much as we are, join us!
 
</div>

Senior Backend Engineer

Frank Energie

<div>
 At Frank Energie we're looking for a Backend Software Engineer to join our team.
 
 
 
 About Frank Energie
 
 
 
 Frank Energie is a rapidly growing company located in the Amsterdam Zuidas district. We are revolutionizing the energy market, accelerating the energy transition, and making affordable sustainable energy accessible to everyone.
 
 
 We are young and ambitious, and we want to move fast. Working towards a greener world. We are already a major player in the Netherlands and are on the verge of conquering the rest of Europe. We expanded to Belgium, Spain and France. This year, we are heading to Denmark and Italy. Will you join us on this journey? Your job will be challenging, but for an ambitious person like you, definitely achievable. Your learning curve will be steep, and the growth opportunities are limitless. In addition to hard work, we also believe in relaxation and team-building activities &ndash; work hard, play hard.
 
 
 
 About The Job
 
 
 
 If you would like to develop backend features in a state-of-the-art infrastructure, have a self-starter attitude and tech-driven curiosity, know that a good opinion must be shared, and are willing to contribute together with a commited team, you can proceed with reading.
 
 
 We are looking for an experienced Software Engineer who will play a key role in building our high-performance, real-time power sourcing and optimization software. Our systems must efficiently process large volumes of data and energy market events, ensuring optimal energy sourcing &amp; optimization in a dynamic market.
 
 
 What you will be doing
 
 
 <ul>
 <li>
 Develop real-time power sourcing &amp; optimization software;
 </li>
 <li>
 Implement event-driven and non-blocking architectures to ensure rapid and scalable data processing;
 </li>
 <li>
 Work with Co/Goroutines to handle large-scale energy market data streams efficiently;
 </li>
 <li>
 Optimize system performance to manage fluctuating energy demand and supply conditions;
 </li>
 <li>
 Collaborate with data scientists, energy analysts, and backend engineers to improve forecasting and automation in power sourcing;
 </li>
 <li>
 Write clean, scalable, and well-tested code to support a reliable and adaptive energy sourcing platform;
 </li>
 <li>
 Have fun with your team!
 
 
 </li>
 </ul>
 
 What will help you succeed?
 
 
 
 
 Being An Expert In
 
 
 
 <ul>
 <li>
 You master at least Go or Kotlin and you are not afraid to start working with both of them;
 </li>
 <li>
 Data structures, algorithm design, problem-solving, complexity analysis, secure coding best practices and remediation;
 </li>
 <li>
 Designing, building and maintaining large-scale, high-performance, real-time systems and frameworks;
 </li>
 <li>
 Knowledge of databases (SQL/NoSQL) and message brokers like Kafka or RabbitMQ;
 </li>
 <li>
 Object-oriented concepts and systems design patterns;
 </li>
 <li>
 Analyzing and troubleshooting distributed systems;
 </li>
 <li>
 Tackling problems of load, scale, and optimizations of complex large-scale deployments;
 </li>
 <li>
 Modern server scaling technologies on Linux (e.g., async, non-blocking I/O, multithreading).
 
 
 </li>
 </ul>
 We offer
 
 
 <ul>
 <li>
 A challenging role in a fast growing company doing new things;
 </li>
 <li>
 An exciting adventure: Feels good to do something no one ever did before;
 </li>
 <li>
 Great colleagues: Young, international and dedicated team;
 </li>
 <li>
 Transparency. You don&rsquo;t execute the roadmap; you are part of it. No office politics here!
 </li>
 <li>
 Team building activities &ndash; &lsquo;work hard, play hard&rsquo;;
 </li>
 <li>
 Personal development focus and support;
 </li>
 <li>
 Entrepreneurship: Become a self-starter and take ownership;
 </li>
 <li>
 Momentum: We move at lightning speed.
 
 
 </li>
 </ul>
 Apply for the job
 
 
 Do you want to join our team as our new Backend Software Engineer? Then we'd love to hear about you!
</div>

Backend Software Engineer

TicketSwap

<div>
 
 At TicketSwap, we&rsquo;re on a mission to become the experience marketplace every fan loves. With over 19 million users across 42 countries, we&rsquo;re building a safe, fair, and easy way for fans to buy and sell tickets to live events around the world. Technology plays a central role in how we solve problems for fans. From scaling our platform and improving event creation to building safer ticketing flows, we&rsquo;re constantly working on products that make live experiences more accessible and trustworthy.
 
 
 
 
 We&rsquo;re built by fans, for fans. That means we care deeply about creating products that genuinely help people, and we believe the best ideas come from curious, collaborative teams who enjoy building together. Right now, we&rsquo;re looking for a Software Engineer Backend (PHP) to join our Engineering team in Amsterdam.
 
 
 
 
 Ready to help shape the future of live events? Keep reading 👇
 
 
 
 What You&rsquo;ll Do
 
 As a Backend Engineer at TicketSwap, you&rsquo;ll work on the systems that power millions of safe ticket transactions worldwide. You&rsquo;ll join a cross-functional product team alongside frontend, mobile, product, and design colleagues to build scalable features and improve the core marketplace experience. You&rsquo;ll have ownership, room to experiment, and the opportunity to see your work reach fans almost immediately.
 
 
 
 
 Your key responsibilities:
 
 <ul>
 <li>
 
 Build and improve backend services and APIs that power our platform
 
 </li>
 <li>
 
 Develop new product features used by millions of fans across web and mobile
 
 </li>
 <li>
 
 Help scale and maintain a reliable, secure, and high-performing marketplace
 
 </li>
 <li>
 
 Work with PHP, Symfony, MySQL, Redis, RabbitMQ, GraphQL, AWS, and Kubernetes
 
 </li>
 <li>
 
 Contribute to our event-driven architecture and asynchronous systems
 
 </li>
 <li>
 
 Collaborate closely with Product Managers, Designers, and Engineers across disciplines
 
 </li>
 <li>
 
 Write clean, maintainable, and well-tested code
 
 </li>
 <li>
 
 Participate in code reviews and contribute to improving engineering standards
 
 </li>
 <li>
 
 Help improve developer experience, tooling, and platform reliability
 
 </li>
 <li>
 
 Contribute ideas that simplify complex technical or product challenges
 
 </li>
 <li>
 
 Continuously learn, experiment, and share knowledge with the team
 
 </li>
 <li>
 
 Some of the projects we&rsquo;re currently working on:
 
 </li>
 <li>
 
 Expanding support for more ticket file types as the ticketing industry evolves
 
 </li>
 <li>
 
 Improving SecureSwap integrations to make events safer and easier to configure for partners
 
 </li>
 <li>
 
 Rebuilding and improving event creation flows across the platform
 
 </li>
 </ul>
 
 About You
 
 We know great engineers come from different backgrounds and experiences. If this role excites you, we&rsquo;d love to hear from you, even if you don&rsquo;t tick every box.
 
 
 What we&rsquo;re looking for:
 
 <ul>
 <li>
 
 3+ years of experience as a Software Engineer
 
 </li>
 <li>
 
 Strong experience with PHP and relational databases like MySQL
 
 </li>
 <li>
 
 Experience with frameworks like Symfony is a strong plus
 
 </li>
 <li>
 
 Comfortable working with Git and modern development workflows
 
 </li>
 <li>
 
 You care about code quality, testing, and maintainability
 
 </li>
 <li>
 
 You enjoy solving real user problems through technology
 
 </li>
 <li>
 
 You&rsquo;re curious, proactive, and open to learning new things
 
 </li>
 <li>
 
 You enjoy collaborating in cross-functional teams
 
 </li>
 <li>
 
 Experience with React, mobile development, AWS, Kubernetes, or DevOps tooling is a bonus
 
 </li>
 <li>
 
 You&rsquo;re based in the Netherlands, have an EU passport, or already hold a valid visa to work here
 
 </li>
 <li>
 
 Please note: we don&rsquo;t offer relocation support for this role.
 
 </li>
 </ul>
 
 
 Why You&rsquo;ll Love It Here
 <ul>
 <li>
 
 Work on products used by millions of fans around the world
 
 </li>
 <li>
 
 Join a high-talent, international team that values ownership and collaboration
 
 </li>
 <li>
 
 Ship meaningful work fast and see the impact directly
 
 </li>
 <li>
 
 Collaborate in an environment where ideas matter more than hierarchy
 
 </li>
 <li>
 
 Learn from experienced engineers who care deeply about quality and innovation
 
 </li>
 <li>
 
 Help shape the future of live events and ticketing
 
 </li>
 </ul>
 
 
 Practical Details
 <ul>
 <li>
 
 Full-time role
 
 </li>
 <li>
 
 Hybrid working setup
 
 </li>
 <li>
 
 Based in Amsterdam
 
 </li>
 <li>
 
 No relocation package provided
 
 </li>
 <li>
 
 This role sits within Function Group 6 or 7, depending on experience and seniority level. We&rsquo;re open to considering both mid-level and senior Backend Engineers
 
 </li>
 </ul>
 
 
 
 
 Excited to join us?
 
 
 
 Research shows that women and people from traditionally underrepresented groups often apply only when they meet every requirement. We&rsquo;d much rather hear from someone who&rsquo;s excited about the role and motivated to grow.
 
 
 At TicketSwap, we welcome people of all backgrounds, identities, and experiences. If this role feels like a good fit for you, we&rsquo;d love to hear from you 🚀
 
</div>

Software Engineer Backend

Together AI

<div>
 
 About The Role
 
 
 
 Together.ai is looking for a Software Engineer to join the Identity &amp; Collaboration team &mdash; a great role for a full-stack or backend engineer who wants to grow into functional programming and the identity space. As part of the Product Foundations engineering group, the Identity &amp; Collaboration team owns authentication flows (including SSO and OAuth), organizations, projects, API keys, and the role-based access controls that enable secure collaboration at scale.
 
 
 Every customer interaction with Together relies on the systems we build. Whether it's a researcher accessing their models, an enterprise team collaborating on a shared project, or a developer making an API call, we make authentication seamless and invisible for simple cases while providing robust, enterprise-grade capabilities for complex organizational structures. Our work directly enables Together's growth from individual users to large enterprise teams, and we're actively building the next generation of collaboration features that will unlock new ways for customers to work together securely and efficiently across all Together products.
 
 
 <ul>
 <li>
 Location: Hybrid in Amsterdam, NL or remote UK, Ireland &amp; Germany
 </li>
 <li>
 Full-time: This means 40 flexible hours, Monday through Friday.
 
 
 </li>
 </ul>
 You'll own well-defined features and small projects end-to-end, shipping work that lands in front of customers. You'll get guidance as you take on unfamiliar problem spaces, with plenty of room to grow toward more autonomy over time. We pair, review each other's code, and learn in the open &mdash; it's a strong environment to level up in.
 
 
 
 Responsibilities
 
 
 
 <ul>
 <li>
 Build and ship features across the stack &mdash; TypeScript/Next.js on the frontend and Elixir/Phoenix services on the backend (which you can grow into)
 </li>
 <li>
 Own well-defined pieces of work end-to-end, from implementation through testing and rollout
 </li>
 <li>
 Contribute to our identity and access features: SSO, OAuth, organizations, projects, API keys, and role-based access control
 </li>
 <li>
 Learn the Elixir/Erlang VM (BEAM) and how we run it in production
 </li>
 <li>
 Participate meaningfully in code review and build your familiarity with our testing, tooling, and workflow
 </li>
 <li>
 Surface blockers early and collaborate with the team to work through them
 </li>
 <li>
 Work with relational (PostgreSQL) and non-relational (MongoDB) data
 
 
 </li>
 </ul>
 
 Requirements
 
 
 
 <ul>
 <li>
 Around 2&ndash;3 years of professional experience writing and shipping production code
 </li>
 <li>
 Solid full-stack or backend engineering, especially with TypeScript (backend and/or frontend, for example with Next.js) &mdash; or another modern stack whose ideas you can bring across
 </li>
 <li>
 Genuine enthusiasm to learn Elixir and Phoenix &mdash; production experience isn't required, and we'll support you in getting there
 </li>
 <li>
 Writes clean, well-organized, well-tested code, and treats code review as a way the team grows together
 </li>
 <li>
 Comfortable owning scoped work and surfacing blockers early
 </li>
 <li>
 Curious, open to feedback, and willing to propose new approaches and make mistakes
 
 
 </li>
 </ul>
 
 Nice to Have
 
 
 
 <ul>
 <li>
 Interest in, or some exposure to, identity and access concepts &mdash; authentication, authorization, SSO, OAuth (this is a great team to learn them on)
 </li>
 <li>
 Any exposure to functional programming (Elixir, Erlang, or similar)
 
 
 </li>
 </ul>
 If you don't meet 100% of the above, you should still consider applying. It's completely fine if you haven't used Elixir yet &mdash; if you're excited to learn it and have a passion for this kind of work, we want to talk to you.
 
 
 
 About Together AI
 
 
 
 Together AI is a research-driven artificial intelligence company. We believe open and transparent AI systems will drive innovation and create the best outcomes for society, and together we are on a mission to significantly lower the cost of modern AI systems by co-designing software, hardware, algorithms, and models. We have contributed to leading open-source research, models, and datasets to advance the frontier of AI, and our team has been behind technological advancement such as FlashAttention, Hyena, FlexGen, and RedPajama. We invite you to join a passionate group of researchers and engineers in our journey in building the next generation AI infrastructure.
 
 
 
 Compensation
 
 
 
 We offer competitive compensation, startup equity, and other competitive benefits. Our salary ranges are determined by location, level and role. Individual compensation will be determined by experience, skills, and job-related knowledge.
 
 
 
 Equal Opportunity
 
 
 
 Together AI is an Equal Opportunity Employer and is proud to offer equal employment opportunity to everyone regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, veteran status, and more
</div>

Software Engineer(Amsterdam)

Workato

<div>
 
 About Workato
 
 
 
 Workato delivers enterprise infrastructure for the agentic era, redefining iPaaS and helping enterprises unify data, applications, processes, and AI into a single, governed platform. A leader in Enterprise MCP and trusted by 50% of the Fortune 500, Workato&rsquo;s cloud-native architecture connects every application, data source, and process to power real-time orchestration at scale. With enterprise-grade security and continuous innovation at its core, Workato provides the trusted foundation for organizations to automate with confidence and operationalize AI across the business. To learn more, visit www.workato.com
 
 
 
 Why join us?
 
 
 
 Ultimately, Workato believes in fostering a
 
 flexible, trust-oriented culture that empowers everyone to take full ownership of their roles
 
 . We are driven by
 
 innovation
 
 and looking for
 
 team players
 
 who want to actively build our company.
 
 
 But, we also believe in
 
 balancing productivity with self-care
 
 . That&rsquo;s why we offer all of our employees a vibrant and dynamic work environment along with a multitude of benefits they can enjoy inside and outside of their work lives.
 
 
 If this sounds right up your alley, please submit an application. We look forward to getting to know you!
 
 
 
 Also, Feel Free To Check Out Why
 
 
 
 <ul>
 <li>
 Business Insider named us an &ldquo;enterprise startup to bet your career on&rdquo;
 </li>
 <li>
 Forbes&rsquo; Cloud 100 recognized us as one of the top 100 private cloud companies in the world
 </li>
 <li>
 Deloitte Tech Fast 500 ranked us as the 17th fastest growing tech company in the Bay Area, and 96th in North America
 </li>
 <li>
 Quartz ranked us the #1 best company for remote workers
 
 
 </li>
 </ul>
 
 Responsibilities
 
 
 
 We are looking for a
 
 Staff AI Engineer
 
 to play a key role in building the core of our AI platform. In this position, you will design and develop production-grade systems that power intelligent automation, agentic workflows, and large-scale retrieval services. This is a highly technical, hands-on role that involves close collaboration with product and platform teams to transform advanced AI concepts into reliable, scalable, and secure solutions used across our enterprise ecosystem. You will also be responsible to:
 
 
 <ul>
 <li>
 Design, build, and maintain AI-powered services and APIs, leveraging LLMs (OpenAI, Anthropic, Qwen, OSS models) and custom ML models.
 </li>
 <li>
 Develop an enterprise-grade agentic framework that enables orchestration, retrieval, and collaboration between multiple AI agents.
 </li>
 <li>
 Implement and optimize knowledge retrieval systems and agentic search capabilities using vector databases such as Qdrant and ElasticSearch.
 </li>
 <li>
 Write well-structured, efficient, and testable Python code for production services, experimentation, and internal developer tools.
 </li>
 <li>
 Build and maintain shared Python libraries and SDKs used across multiple applications and microservices.
 </li>
 <li>
 Collaborate with cross-functional teams on architecture, internal protocols, and API standards to ensure consistency and reliability across the platform.
 </li>
 <li>
 Develop and enhance monitoring, validation, and observability for production-grade AI solutions.
 </li>
 <li>
 Drive the full software development lifecycle - from design and implementation to deployment, monitoring, and continuous improvement.
 </li>
 <li>
 Identify and resolve performance bottlenecks, reliability issues, and scaling challenges in complex, data-intensive environments.
 </li>
 <li>
 Participate in code reviews and technical discussions, mentoring other engineers and contributing to a culture of excellence.
 
 
 </li>
 </ul>
 
 Example Projects
 
 
 
 <ul>
 <li>
 Building an evaluation and observability framework for AI model performance and reliability.
 </li>
 <li>
 Developing an agentic orchestration platform that enables collaboration among multiple AI agents and tools.
 </li>
 <li>
 Implementing semantic retrieval and agentic search capabilities over large enterprise knowledge bases.
 </li>
 <li>
 Designing AI services that process and reason over high-volume real-world data at scale.
 
 
 </li>
 </ul>
 
 Requirements
 
 
 
 
 Qualifications / Experience / Technical Skills
 
 
 
 <ul>
 <li>
 Bachelor&rsquo;s or Master&rsquo;s degree in Computer Science, Engineering, or a related field, or equivalent practical experience.
 </li>
 <li>
 5+ years of experience as a Software Engineer, with strong proficiency in Python.
 </li>
 <li>
 Proven track record of building and maintaining production-grade systems using Python.
 </li>
 <li>
 Strong understanding of distributed systems, API design, and data-driven architectures.
 </li>
 <li>
 Experience with relational and non-relational databases (PostgreSQL, Elastic, Qdrant, or similar).
 </li>
 <li>
 Familiarity with AI/ML system design, including LLM integration and evaluation pipelines.
 </li>
 <li>
 Knowledge of DevOps and observability practices (CI/CD, monitoring, metrics, and model validation).
 </li>
 <li>
 Python
 </li>
 <li>
 FastAPI
 </li>
 <li>
 LLM APIs (OpenAI, Anthropic, Qwen, OSS)
 </li>
 <li>
 LiteLLM
 </li>
 <li>
 Qdrant
 </li>
 <li>
 PostgreSQL
 </li>
 <li>
 ElasticSearch
 </li>
 <li>
 Langfuse
 </li>
 <li>
 Kubernetes
 </li>
 <li>
 GitHub Actions
 </li>
 <li>
 ArgoCD
 
 
 </li>
 </ul>
 
 Preferred Skills
 
 
 
 <ul>
 <li>
 Experience working with multiple LLM providers (OpenAI, Anthropic, Qwen, open-source models).
 </li>
 <li>
 Background in developer platforms or AI infrastructure services.
 </li>
 <li>
 Familiarity with vector databases, semantic retrieval, and knowledge graph architectures.
 </li>
 <li>
 Exposure to Langfuse, LiteLLM, LangChain, or similar frameworks.
 </li>
 <li>
 Experience developing enterprise-scale SaaS or distributed backend systems.
 </li>
 <li>
 Contributions to open-source projects in Python, AI, or infrastructure engineering.
 
 
 </li>
 </ul>
 
 Soft Skills / Personal Characteristics
 
 
 
 <ul>
 <li>
 Excellent communication skills, with the ability to convey complex technical ideas clearly to both technical and non-technical audiences.
 </li>
 <li>
 Collaborative and proactive approach, comfortable working across teams in a dynamic environment.
 </li>
 <li>
 Strong analytical and problem-solving abilities, with a focus on continuous improvement and innovation.
 </li>
 <li>
 Curiosity and a genuine interest in emerging AI technologies and modern backend architectures.
 
 
 </li>
 </ul>
 
 (REQ ID: 2460)
 
</div>

Staff AI Engineer

Firely

<div><h4 class="jobSectionHeader">Position details</h4><div>
Amsterdam | Hybrid | 32&ndash;40 hours | No Visa Sponsorships!
About the role
At Firely, we build enterprise-grade software that makes health data more accessible and more useful. Our FHIR server is at the heart of that work, helping healthcare organizations around the world exchange data more reliably and efficiently.
Yes, it&rsquo;s technical. But it&rsquo;s also meaningful. Better health data exchange means better informed care.
To help us push that further, we&rsquo;re looking for a talented and curious Backend Developer (.NET) to join our development team. This role is for someone who enjoys owning their work, diving into hard problems, and contributing to a standard that&rsquo;s shaping the future of healthcare.
You&rsquo;ll work in a small, collaborative team alongside a product owner, lead developer/architect, and fellow engineers. You&rsquo;ll have real autonomy over your technical scope and senior colleagues to think alongside when the problems get complex.
What you&rsquo;ll be doing
You&rsquo;ll contribute to the development and improvement of Firely Server, our flagship FHIR server product. That means building new features, improving performance, and helping shape the technical direction of what we ship.
In this role, you will:<ul><li>
Design and implement backend features in .NET / C#</li><li>
Work with REST APIs to enable reliable health data exchange</li><li>
Write and optimize queries across MS SQL Server and/or MongoDB; including indexing strategies and schema design for healthcare data</li><li>
Handle and validate JSON/XML payloads in line with FHIR specifications</li><li>
Contribute to code reviews, technical discussions, and architectural decisions</li><li>
Use AI tools to support development, planning, and quality assurance</li><li>
Collaborate with colleagues and, where relevant, engage with the wider FHIR community</li></ul>
Who we think will thrive here
You&rsquo;re someone who takes ownership, asks good questions, and cares about the quality of what you ship. You&rsquo;re energized by technically challenging work, comfortable with ambiguity, and not put off by a spirited debate in the FHIR community.
Required</div><div><ul><li>
Proficiency in .NET / C# backend development</li><li>
Solid understanding of REST APIs and how to work with them effectively</li><li>
Database experience with MS SQL Server and/or MongoDB</li><li>
Experience with AWSor Azure</li><li>
Experience handling JSON/XML payloads, including validation and storage</li><li>
Experience using AI tools to support development, planning, and quality assurance</li><li>
Familiarity with Git and tools like Jira, GitHub Projects</li><li>
Already authorized to work in the Netherlands</li><li>
Fluent English (written and spoken)</li></ul>
Nice to have<ul><li>
A bachelor&rsquo;s degree in computer science or equivalent working level</li><li>
At least 2 years of .NET / C# backend development experience</li><li>
Knowledge of HL7 and/or FHIR</li><li>
Familiarity with additional data stores such as PostgreSQL or cloud-native databases (e.g.Azure Cosmos DB, AWS RDS)</li><li>
A background in or curiosity about the healthcare sector</li></ul>
What you&rsquo;ll get from us
We want this to be a place where you can do great work, keep growing, and feel genuinely trusted with things that matter. You can expect:<ul><li>
Real ownership of your work, with support from experienced colleagues</li><li>
Plenty of room to develop your skills across a technically rich stack</li><li>
Active involvement in hackathons and international FHIR working group meetings</li><li>
A salary between &euro;5,000 and &euro;6,000 gross per month based on a 40-hour workweek</li><li>
27 holidays based on a 40-hour work week</li><li>
A hybrid role (with 2 days in the office), full-time or 4 days &mdash; you choose</li><li>
NS Business Card to travel 1st class to work</li><li>
Bring your own device or budget to purchase a new one</li><li>
Budget to set-up your home office</li><li>
Annual budget to support your growth and development</li><li>
A cozy office in the heart of Amsterdam with a canal view 
 
Questions about this role? Reach out to our HR &amp; Recruitment team at recruitment@fire.ly</li></ul></div><h4 class="jobSectionHeader">
About us</h4><div>
Be part of the revolution in Health Informatics! 
 
Firely is a digital healthcare scale-up. We specialize in software and services in healthcare and research. The company is one of the initiators of HL7 FHIR (pronounced &ldquo;fire&rdquo;), a new international standard for information exchange in healthcare. By making health data more accessible, Firely helps developers worldwide build apps that ultimately benefit patients. Our customers are healthtech vendors, care providers, payers/insurance companies, governments, and health agencies in Europe and the US. 
 
Firely is a group of software engineers, support engineers, FHIR consultants, and a commercial team. Our head office is based in Amsterdam (the Netherlands), our international team works from Europe and the US. 
 
An important part of our activities is the involvement in the development of both the FHIR standard itself and FHIR tooling and open-source libraries. Besides that, we are the organizers of FHIR DevDays, and founding member of the FHIR Business Alliance (FHIRBall). We live and breathe FHIR, we talk FHIR to our computers, our colleagues, and even our friends which &hellip; frankly &hellip; drives them crazy! Working with Firely means working with FHIR, building software, and doing consultancy in an international team. It means FHIR DevDays. It means being part of the FHIR revolution. If you have the curiosity, passion, and collaborative spirit, work with us, and let's fire it up together! 
 
Apply by clicking on the 'apply for this position' button below. Please make sure you send us your CV and a motivation letter. 
 
Our Commitment to Equality 
 
Firely is proud to be an equal opportunity workplace. We are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, Veteran Status, or any other characteristic protected by law.</div></div>

FHIR Backend Developer | .NET

Planner 5D

<div>
 About us:
 
 
 
 Planner 5D
 
 is a global hub for home design, uniting over 100+ million users in 230 territories around our planet (yes, we have 2 users connecting from Antarctica each month!). Our platform simplifies the home renovation process from concept to execution, and this process has never been more straightforward with our cutting-edge software. You don't need to be a professional designer to enhance your home or workspace. We are dedicated to streamlining the design experience, making the customization of dream homes accessible to everyone.
 
 
 Our cross-platform presence spans Web, iOS, Android, Windows, and MacOS, ensuring seamless synchronization for our users. Planner 5D is more than just software; it's a vibrant community of enthusiastic and product-oriented professionals. From diverse backgrounds, our team collaborates across time zones, fueled by a shared passion to revolutionize the home design market.
 
 
 We are constantly looking for like-minded talent eager to take ownership and drive innovation within our expanding suite of tools. Join us in shaping the future of home design.
 
 
 We&rsquo;re looking for a
 
 Java/Kotlin Engineer
 
 who will develop tools and pipelines related to AI, rendering, data conversion, and similar areas.
 
 
 Our tech stack:
 
 
 <ul>
 <li>
 Languages: Kotlin, Python
 </li>
 <li>
 Core development: Kotlin/JVM, Java, coroutines, serialization, reflection, dependency injection with Dagger
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 3D and rendering workflows: Blender Python scripting, glTF processing, 3D model conversion, geometry/math-related tooling, scene and asset preparation pipelines
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 Data and storage: MongoDB, SQLite, FlatBuffers
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 Infrastructure and observability: Prometheus metrics, Sentry, CI/CD, Git, Git LFS, internal monitoring and logging
 
 
 
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 </ul>
 
 Responsibilities:
 
 
 
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 Develop and maintain Kotlin/JVM-based backend tools, console applications, utilities, and automation pipelines;
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 Develop and support Python-based Blender rendering pipelines, including scene processing, automation and production rendering workflows;
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 Work on platform components for preparing catalogs, launching processing pipelines, converting 3D models, and supporting internal production workflows;
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 Build and maintain tooling related to 3D content processing, geometry, scene preparation, wall generation, model conversion, and other math-heavy tasks;
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 Research and evaluate current and upcoming technologies related to 3D, rendering, media formats, data processing, and production automation;
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 Write maintainable, high-performance, and high-quality code using best practices, SOLID principles, automated tests, code reviews, and clean architecture
 
 
 
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 </ul>
 
 Required knowledge of:
 
 
 
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 <li>
 Strong experience with Java and/or Kotlin on JVM;
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 Practical experience with Python, willingness to work deeply with Python-based Blender rendering pipelines;
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 Good understanding of JVM ecosystem: Gradle, dependency management, modular code structure, debugging, profiling, logging, and performance optimization;
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 Solid SQL knowledge (SQLite, MySQL, PostgreSQL);
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 Good understanding of object-oriented programming, SOLID principles, clean architecture, and maintainable code design;
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 Ability to work with math-heavy, data-heavy, or algorithmic tasks and turn them into stable production solutions;
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 Ability to write clean, reliable, high-performance code and cover critical logic with tests;
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 <li>
 Knowledge of Linux, common tools, and Linux ecosystem;
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 Fluent in English
 
 
 
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 </ul>
 
 Nice to have:
 
 
 
 <ul>
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 Experience with Python, C / C++ languages;
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 Experience with popular libraries like Spring, Dagger, JUnit, Apache Commons;
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 Understanding of 2D / 3D technologies and software (for example OpenGL, WebGL, Raytracing, Blender);
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 Understanding of Mathematics, Geometry, Computer Vision;
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 <li>
 Understanding of Kubernetes, Docker and nearby technologies
 
 
 
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 </ul>
 
 Several example of tasks you will be doing:
 
 
 
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 Process data from APIs, databases, JSON, XML, and other sources;
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 Transform assets (images, 3D models, videos, etc.) into different formats;
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 Import and export of 2D/3D data from and to .dxf/.dwg/.blend formats;
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 Write a Blender plugin to load data and provide additional modeling functionality;
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 Write high performance code using CPU and GPU to the max (using parallel, concurrent programming like coroutines, threads, Rx, promises, futures, etc.);
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 Build processing pipelines, where multiple threads are used to max out CPUs and do lots of different processing on multiple threads/coroutines/Rx/java streams/etc
 
 
 
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 </ul>
 
 What we offer:
 
 
 
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 Great work environment that balances freedom and responsibility
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 Our team is made up of friendly and passionate enthusiasts who are eager to help and share their knowledge
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 We believe in work-life balance, so you'll receive around 30+ days of paid holidays per year
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 Company computer equipment by request
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 Education courses for our team members, and we're willing to allocate funds toward your training expenses
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 <li>
 English classes on our corporate platform
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 <li>
 Offline company events in Lithuania and online team-building
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 <li>
 Unlimited free Planner5D subscriptions
 
 
 
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 </ul>
 We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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Java/Kotlin Internal Tools Developer

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