senior web engineer

HOMETRACK

<div>Hybrid working pattern - 2 days per week from London Bridge Office
Hometrack is seeking an experienced Senior Data Engineer to join our product team to help us deliver Hometrack's Data Services ambitions. By building the best property data sets available, which back the market leading AVM, trusted by 17 out of the top 20 mortgage lenders in the UK, we open the door to helping all our customers make the decisions that matter to them - to buy, to lend, to build.
The Data Services team works with 100s of customers across the property sector ranging from mortgage lenders, house builders, investors, fin &amp; proptech, insurers, telco, retail and utilities, as well as others involved in the housing market. Our mission is to inform decision makers by putting the UK&rsquo;s most trusted property data and insights at the heart of the property ecosystem.
Our market intelligence and customer acquisition, retention and engagement solutions are relied upon by leading industry professionals.
Data Services has a diverse product range covering market, property and mover intelligence, delivered through varying mechanisms including data platforms, reports and APIs, providing maximum flexibility when matching our customers&rsquo; needs to the most effective data solution.
Hometrack is looking for an experienced senior data engineer to help us make this a reality.
What we&rsquo;re looking for in a Senior Data Engineer:<ul><li>
Be accountable for team outcomes, playing your part in achieving team goals and ensuring your contribution positively impacts overall success</li><li>
Be a continual improver, looking for ways to help the team do better and be better, again and again</li><li>
Write maintainable, testable code and enjoy providing code reviews</li><li>
Be experienced with Databricks, Delta Lake and Lakehouse architecture for efficient data management; experience with ETL processes and optimizing data pipelines for performance</li><li>
Be strong in Python, SQL, and PySpark</li><li>
Be passionate about building data products for stakeholders and customers, ensuring they are stable, scalable, secure, accurate, observable, and performant</li><li>
Enjoy collaborating closely with colleagues in Product, Analytics, Security, and Software, explaining technical concepts to non-technical audiences</li></ul></div>

Senior Data Engineer

Bloomberg

<div><div><div><div><div>The Login Platform group covers all aspects of user authentication and experience across Terminal and Enterprise (non-Terminal) workflows. This includes teams that manage Bloomberg&rsquo;s Single Sign-On (SSO), Multi-Factor Authentication, user login experience, and the sessions platform used to propagate authentication and authorization context throughout the Bloomberg ecosystem.</div> 
<div></div> 
<div>Sessions are the backbone of authorization decisions across Bloomberg. They are created from entry points including the Terminal, Mobile, Enterprise applications, Web, and more. These sessions need to include the correct entitlements, customer data, and security context so that application teams can make the accurate entitlement decisions.</div>
<div>Whenever you access any data in Bloomberg, the information that determines what you can do and what data you can access flows through our systems!</div> 
<div></div> 
<div>We&rsquo;re evolving our session and authorization infrastructure to support AI agents, MCP-based integrations, and machine-to-machine workflows across Bloomberg systems.</div> 
<div></div> 
<div>We are hiring Senior Software Engineers for two closely related teams in London focused on session infrastructure and session lifecycle management.</div> 
<div></div> 
 
<div>Where we sit: 
</div><div></div> 
<div>We&rsquo;re part of Login Platform within the Platform Security organization, operating deep in the infrastructure stack. Our teams own the framework that orchestrates sessions enrichment flows, while data-owning teams provide and manage the underlying datasets.</div> 
<div></div> 
<div>Almost every business unit at Bloomberg depends on our platform to make authorization and access-control decisions. Our software is critical to maintaining Bloomberg&rsquo;s reliability, compliance, and continued growth. Because of our position in the stack, we enforce security not only for others, but for ourselves as well.</div> 
<div></div> 
<div>What you&rsquo;ll do: 
</div><div></div> 
<div>As a Senior Software Engineer, you&rsquo;ll play a key role in shaping and scaling the infrastructure that powers session creation, enrichment and authorization across Bloomberg.</div> 
<div></div> 
<div>You will: 
 
 
</div><ul><li>Design, build, and optimize low-latency, multi-threaded backend systems that handle session and authorization data at scale.</li></ul>
<ul><li>Collaborate with multiple Engineering and Product teams to deliver a reliable and secure login experience.</li></ul>
<ul><li>Contribute to architectural decisions and long-term technical strategy for the Login Platform.</li></ul>
<ul><li>Improve tooling, observability, scalability, and performance across critical infrastructure services .</li></ul>
<ul><li>Explore and champion new ideas to evolve our systems responsibly over time. 
</li></ul> 
<div>Engineers on the team are involved throughout the software lifecycle, including design, deployment, observability, incident response, and long-term platform evolution.</div> 
<div></div> 
<div>Our technologies: 
</div><div></div> 
<div>We work primarily in C++ and some Python, running mostly on Linux, with continued support for Solaris clients until full migration is complete.</div>
<div>Because we sit deep in the infrastructure stack, you&rsquo;ll often need to balance innovation with compatibility, designing modern, robust solutions that coexist with legacy systems.</div> 
<div></div> 
<div>You&rsquo;ll need to have: 
</div><div></div> 
<ul><li>Strong software engineering experience in C++, ideally building backend, infrastructure, platform, or systems-level software.</li></ul>
<ul><li>Experience designing, building, or operating distributed backend systems, ideally in high-availability, low-latency, or infrastructure-heavy environments.</li></ul>
<ul><li>Strong experience designing and building multi-threaded or concurrent applications.</li></ul>
<ul><li>Experience owning software across the full lifecycle, including design, implementation, testing, deployment, observability, incident response, and long-term evolution.</li></ul>
<ul><li>Ability to make pragmatic system design decisions across performance, scalability, reliability, maintainability, and compatibility constraints.</li></ul>
<ul><li>An eagerness to understand a large, non-trivial stack and propose incremental improvements without compromising reliability or security.</li></ul>
<ul><li>Strong communication and collaboration skills, with the ability to work effectively across Engineering, Product and platform-dependent teams.</li></ul>
<ul><li>A Degree in Computer Science, Engineering, Mathematics, similar field of study or equivalent work experience.</li></ul> 
<div></div> 
<div>We&rsquo;d love to see: 
</div><div></div> 
<ul><li>Background in authentication, authorization, identity, access control, entitlement systems, SSO, MFA, session management, or security-sensitive infrastructure.</li></ul>
<ul><li>Familiarity with systems that propagate authentication, authorization, entitlement, or security context across distributed services.</li></ul>
<ul><li>A track record of building low-latency, reliable backend or infrastructure services.</li></ul>
<ul><li>Hands-on involvement in improving observability, scalability, performance, reliability, or operational tooling for production systems</li></ul>
<ul><li>Exposure to platform teams that support multiple internal product or application teams.</li></ul>
<ul><li>Experience working across multiple business units or products, with an understanding of their operational and integration challenges.</li></ul> 
</div></div><div></div> 
 
<div><div> 
If indicated, please note that years of experience are a guide; we will consider applications from all candidates who can demonstrate the skills necessary for the role.
</div></div><div><div>Discover what makes Bloomberg unique - watch our podcast series for an inside look at our culture, values, and the people behind our success.</div></div></div></div>
 <div><h2 class="jobSectionHeader">Accommodations</h2>
Bloomberg provides reasonable adjustment/accommodation to individuals with disabilities. Please tell us if you require a reasonable adjustment/accommodation to apply for a job. Examples of reasonable adjustment/accommodation include but are not limited to making a change to the application process or work procedures, providing documents in an alternate format or using specialized equipment. To request an adjustment/accommodation to apply for a job, please email AMER_recruit@bloomberg.net (Americas), EMEA_recruit@bloomberg.net (Europe, the Middle East and Africa), or APAC_recruit@bloomberg.net (Asia-Pacific), based on the region you are submitting an application for. We may share your information with a third party provider of accommodations services who may use this information to reach out to you for the purposes of accommodating your application.
<h2 class="jobSectionHeader">Equal Opportunity</h2>
Bloomberg is an equal opportunity employer and prohibits discrimination in employment. It is Bloomberg&rsquo;s policy to provide equal opportunity and access for all persons, and the Company is committed to attracting, retaining, developing, and promoting the most qualified individuals without regard to age, ancestry, color, gender identity or expression, genetic predisposition or carrier status, marital status, national or ethnic origin, race, religion or belief, sex, sexual orientation, self-identified or perceived sex, sexual and other reproductive health decisions, parental or caring status, physical or mental disability, pregnancy, childbirth or related medical conditions, or parental leave, protected veteran status, status as a victim of domestic violence, or any other classification protected by applicable law (each, a &ldquo;Protected Characteristic&rdquo;). Bloomberg prohibits treating applicants or employees less favorably in connection with the terms and conditions of employment, in all phases of the employment process, because of one or more Protected Characteristics.</div>

Senior Software Engineer - Login Platform

Harmonic Security

<div>AI is being run everywhere, by humans and agents. Harmonic Security governs all of it. The AI Governance and Control (AIGC) platform understands user / agent intent and data context in real time, giving security teams visibility and control across every tool and workflow so companies can move faster with AI while minimizing risk.
We operate in one of the fastest-moving spaces in tech: the emerging intersection of AI and cybersecurity. It's a market still being defined, and we're among the first to build natively for it - protecting sensitive data in real time, at the endpoint, with minimal friction for the teams using it. Enterprises get full visibility and control. Their people get to innovate without guardrails slowing them down.
Named to the Rising in Cyber 2026 list, Harmonic is gaining serious recognition and serious traction. We're led by deep cybersecurity expertise and backed by investors who know the space: N47, Ten Eleven Ventures, and In-Q-Tel.
As AI adoption inside the enterprise accelerates, the ability to safely observe, control, and enforce policy in real time isn't a nice-to-have. It's mission-critical infrastructure. That's what we build.<h2 class="jobSectionHeader">
How We Work: AI-First by Design</h2>
Harmonic exists to help enterprises adopt AI safely and at scale. We hold ourselves to that same standard. Everyone here actively leverages AI tools to perform their best work &mdash; from deep research and writing to building robust processes and automating complex workflows. We expect every new hire to bring a genuine curiosity for AI and a commitment to using it to work smarter, faster, and with greater creativity.
For some, this involves tinkering and remaining open to emerging tools; for others, it means architecting entirely new systems with AI at the core. We will be transparent about expectations for every role and provide the tools and support needed for you to thrive.<h2 class="jobSectionHeader">
About the Team</h2>
Our Product Delivery team is the engine that turns vision into impact. We ship early and often, getting valuable features into the hands of customers quickly and iterating from there. We work in the open by default, sharing progress and ideas, and we trust each other to own outcomes. We&rsquo;re a small but mighty crew where every person plays a critical role and we&rsquo;re committed to using AI to work smarter and faster.<h2 class="jobSectionHeader">
About the Role</h2>
We&rsquo;re looking for a Backend Engineer who has an appreciation for all things security and system interconnectivity. This is a very hands-on technical role where you will be responsible for designing, building and maintaining scalable integrations between our core applications, identity providers and data security platforms.<h2 class="jobSectionHeader">
What You'll Do</h2><ul><li>
Own deliveries and features from start to finish</li><li>
Design, build, and own backend services in a microservices-based, event-driven architecture</li><li>
Implement core domain logic that drives key product workflows and system behavior</li><li>
Ingest and process high-volume usage and event data from customer-facing endpoints</li><li>
Build backend services that support operational, analytics, and reporting use cases</li><li>
Model, persist, and manage domain data, enabling querying, filtering, and lifecycle management</li><li>
Expose well-designed APIs and webhooks consumed by customers, UIs, and external systems</li><li>
Power customer-facing UI experiences by providing backend APIs for visibility, analytics, and configuration</li></ul><h2 class="jobSectionHeader">
What You Bring</h2><ul><li>
3&ndash;5+ years of professional software engineering experience building backend services and distributed systems in the Java ecosystem (Java, Spring Boot, Maven/Gradle)</li><li>
Strong understanding of event-driven architectures, asynchronous processing patterns, messaging systems, and distributed system design</li><li>
Proven experience designing and maintaining RESTful APIs, web hooks, and service-to-service integrations</li><li>
Comfortable operating in AWS, GCP, or Azure environments and working with modern observability tooling, logging, and monitoring platforms</li><li>
A track record of delivering performant, reliable and scalable applications</li><li>
Excellent collaboration and communication skills in cross-functional teams</li></ul><h2 class="jobSectionHeader">
You Might Be a Fit if You</h2><ul><li>
Have experience building products in cybersecurity, identity, governance, compliance, data protection, or enterprise SaaS environments</li><li>
You understand not just how to build systems, but why architectural decisions matter</li><li>
You can balance scalability, reliability, maintainability, and speed of execution</li><li>
You think critically about security, observability, and operational excellence from day one</li><li>
Love the idea of blending software development, distributed systems and data-intensive applications</li><li>
Strong familiarity with authentication and identity technologies such as OAuth, OpenID Connect (OIDC), SAML, SCIM, Entra ID (Azure AD), Okta, or other enterprise identity providers</li><li>
Thrive in fast-paced startup environments where ambiguity is the norm</li><li>
Enjoy shaping culture and engineering practices, not just writing code</li><li>
Leverage AI tools as an engineer to help you build smarter, faster and better</li></ul><h2 class="jobSectionHeader">
Why Join Us</h2>
This isn't just a job - it's a chance to help define a category. Harmonic Security was named to the Rising in Cyber 2026 list, and we're just getting started. We're building at the intersection of AI and security, carving out an emerging market where the rules haven't been written yet, and the people who join now will write them.
We believe today's talent is tomorrow's success, and we're committed to creating an environment where you can do the best work of your life.<ul><li>
Recognized momentum - We made the Rising in Cyber 2026 list, a signal that the market is taking notice</li><li>
Rare market opportunity - Join early in a category-defining company at the convergence of AI and security, where your work directly shapes how enterprises tackle one of the biggest unsolved problems in tech</li><li>
Competitive pay and meaningful equity - A real stake in Harmonic's success, not a token gesture</li><li>
Comprehensive benefits - 401K, pension plan, generous PTO, and flexible hybrid work</li><li>
A small, high-trust team that values transparency, creativity, and continuous learning - no politics, no bureaucracy</li><li>
Thoughtful leadership - that cares deeply about your growth, not just your output</li><li>
Annual global off-sites - past trips include Lisbon, Portugal and Nashville, TN</li><li>
Real ownership - you'll shape the product, the culture, and the direction of the company from day one</li></ul><h2 class="jobSectionHeader">
Harmonic's Core Values</h2>
Flourish in the Unknown
We embrace new, unfamiliar situations that require initiative and rapid decision-making. We orient ourselves quickly and deliver results with minimal guidance.
Never Full
We raise our hands, take on challenges, and assist others whenever possible. We hunger for opportunities to learn and do more.
Perfect Harmony
We support one another to create cohesion and unity. We collaborate openly, share feedback honestly, and help everyone produce their best work
Compensation Range: &pound;89K - &pound;105K</div>

Senior Backend Engineer

Speechify

<div>The mission of Speechify is to make sure that reading is never a barrier to learning.

Over 50 million people use Speechify's text-to-speech products to turn whatever they're reading &ndash; PDFs, books, Google Docs, news articles, websites &ndash; into audio, so they can read faster, read more, and remember more. Speechify's text-to-speech reading products include its iOS app, Android App, Mac App, Chrome Extension, and Web App. Google recently named Speechify the Chrome Extension of the Year and Apple named Speechify its App of the Day.

Today, nearly 200 people around the globe work on Speechify in a 100% distributed setting &ndash; Speechify has no office. These include frontend and backend engineers, AI research scientists, and others from Amazon, Microsoft, and Google, leading PhD programs like Stanford, high growth startups like Stripe, Vercel, Bolt, and many founders of their own companies.

This is a key role and ideal for someone who thinks strategically, enjoys fast-paced environments, passionate about making product decisions, and has experience building great user experiences that delight users.

We are a flat organization that allows anyone to become a leader by showing excellent technical skills and delivering results consistently and fast. Work ethic, solid communication skills, and obsession with winning are paramount.

Our interview process involves several technical interviews and we aim to complete them within 1 week.

What You'll Do
<ul>
<li>Actively ship production code to the web products</li>
<li>Work closely with your dedicated product team</li>
<li>Participate in product discussions to shape the product roadmap</li>
<li>Have the opportunity to work on new and exciting features that will impact millions of lives</li>
</ul>
An Ideal Candidate Should Have
<ul>
<li>Experience. You've built and ship products that have scaled to thousands or millions of users</li>
<li>Customer obsession. You are passionate about the field and have the desire to build high quality product that serves customer needs</li>
<li>Speed. You work quickly to generate ideas and know how to decide which things can ship now and what things need time</li>
<li>Focus. We're a high-growth startup with a busy, remote team. You know how and when to engage or be heads down</li>
<li>Collaboration. You know how to inspire, play, and negotiate with opinionated designers, marketers, and PMs</li>
<li>Tech Stack: Vanilla JS, ReactJS, Redux, Firebase, Typescript</li>
</ul>
What We Offer
<ul><li>A fast-growing environment where you can help shape the culture</li>
<li>An entrepreneurial crew that supports risk, intuition, and hustle</li>
<li>A hands-off approach so you can focus and do your best work</li>
<li>The opportunity to make an impact in a transformative industry</li>
<li>A competitive salary, a collegiate atmosphere, and a commitment to building a great asynchronous culture</li>
</ul>
Think you're a good fit for this job?

Tell us more about yourself and why you're interested in the role when you apply.
 
And don't forget to include links to your portfolio and LinkedIn.

Not looking but know someone who would make a great fit?

Refer them!

Speechify is committed to a diverse and inclusive workplace.

Speechify does not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status.</div>

Tech Lead, Web Core Product & Chrome Extension - London, United Kingdom

Codurance

<div>Codurance is a global software consultancy, focused on raising the bar in the software industry through supporting tech communities and working with our clients. We help our clients build remarkable digital products, evolve strategic legacy systems, and equip them to continuously deliver value through the adoption of quality practices and expertise.
We are looking for a Contract Senior Data Engineer who shares our values of craftsmanship, pragmatism, and professionalism. You understand that data engineering is, at its core, great software engineering, applied at scale, with rigour, and with production in mind.
Databricks is our primary data engineering platform, and you will be expected to use it fluently, but the goal is always durable, well-crafted data systems, not tool advocacy.
This is an initial 6-month contract, inside IR35.
What You&rsquo;ll Work On
Our data engineering engagements fall into three primary shapes:<ul><li>
Data Foundations</li><li>
Data Modernisation, re-platforming legacy ETL, introducing automated testing and data contracts, and aligning data models with application domains</li><li>
AI-Ready Data Enablement, preparing data systems to safely support AI and ML use cases, including feature pipelines, scalable compute, and guardrails around data quality and lineage</li></ul>
These engagements sit within wider software modernisation and platform evolution work, not as standalone data projects. You&rsquo;ll work alongside software craftspeople, architects, and client engineers, with data as one part of a broader delivery picture. 
Requirements 
You consider yourself a data engineer with strong software engineering instincts. You care deeply about the quality, testability, and operability of what you build, not just whether it runs.
You are comfortable working in small increments, tightening feedback loops, and letting tests inform your pipeline design. You understand that data systems live in production long after they are first delivered, and you build with that in mind.
You are a team player who values frequent collaboration with software engineers, data scientists, business analysts and client stakeholders alike. You invest in your craft, stay curious about emerging tooling, and are enthusiastic about sharing what you learn.
Data Engineering Practices
You have solid experience applying software engineering disciplines to data: writing testable pipelines, using version control rigorously, and treating data models as first-class software artefacts. You are familiar with data contracts, schema evolution, and the principles of incremental delivery applied to data work.
Platform and Architecture
You have hands-on experience with Databricks and are comfortable across its core capabilities: Delta Lake, Unity Catalog, Databricks Workflows, and notebook-to-production pipeline patterns. You have a working understanding of lakehouse architecture and medallion design, and can articulate trade-offs clearly to clients and colleagues.
Beyond Databricks, experience with the broader data engineering landscape, including tools such as dbt, Apache Spark, and data quality frameworks, is a plus.
Data Engineering for ML and AI
You understand how machine learning and AI systems consume data, and you build the pipelines that feed them to production. You are comfortable with engineering reproducible feature pipelines, managing feature tables in Unity Catalog, and using MLflow for experiment tracking and model registry so that training data and model lineage stay traceable. You prepare and version the datasets that models depend on, and you treat that data with the same rigour you apply to any production system.
You are familiar with the data engineering behind modern AI use cases: building embedding and retrieval pipelines, populating and maintaining vector stores, and assembling the evaluation and ground-truth datasets that make model behaviour measurable.
Software Engineering Foundations
Your data engineering work is grounded in solid software fundamentals. You understand clean code principles, meaningful abstraction, and the difference between code that works and code that can be maintained. You are familiar with CI/CD applied to data pipelines and are comfortable contributing to infrastructure-as-code environments.
Observability and Production Readiness
You understand what it means to run data systems in production. This includes pipeline monitoring, alerting, data quality validation, lineage tracking, and the operational disciplines needed to maintain trust in data over time.
Cloud Platforms
You have experience working on at least one major cloud provider (AWS or Azure) and are comfortable with the infrastructure patterns that underpin modern data platforms. Familiarity with cloud-native services for storage, compute, and orchestration is expected.
Collaboration and Client Engagement
You can work effectively within a client&rsquo;s environment and communicate clearly with both technical and non-technical stakeholders. You understand how to manage expectations, navigate legacy constraints, and make pragmatic decisions under real-world delivery conditions.
Legal / Eligibility
You must be eligible to work in the UK. 
Benefits</div>

Senior Data Engineer (Contract)

Zoopla

<div>Who We Are
Zoopla is one of the UK&rsquo;s most instantly recognisable property brands. In fact, we&rsquo;re known and loved by over 91% of the nation (and we&rsquo;re working hard on the other 9%). Our mission is to help the nation make better home decisions - by connecting everyone to their home and giving them personalised insights to help with moving, managing or financing. Over 50 million people visit Zoopla every month to access exclusive data and information on every UK property, search over 500,000 homes for sale and rent, find the best agents and secure the latest mortgage deals.
We&rsquo;re a growing, dynamic team that embraces innovation and isn&rsquo;t afraid to push the boundaries. We&rsquo;re only just starting our journey to redefine the digital property landscape, with much more to explore and achieve. Join us, and transform the way the nation makes home decisions.
What You'll Do
At Zoopla you will design and run the search and retrieval systems behind the consumer portal, serving millions of users. Search relevance, ranking, and the services and data pipelines that feed them sit at the centre of this role. If you care about robust APIs, fast and relevant search, scalable distributed services, observability, and personalisation, this is for you.
You will work primarily in Python and TypeScript across Node.js and GraphQL, with some services in Golang or Perl. You will own search infrastructure end to end on OpenSearch (or Elasticsearch): indexing, query design, relevance tuning, and performance at scale. You will design and maintain the APIs and data pipelines that power it, working across both SQL and NoSQL stores on AWS.
This is a backend role. You will touch the frontend (React and TypeScript) occasionally when a feature needs it, but deep frontend specialism is not expected.
Requirements (all essential)<ul><li>
Senior engineer who has built and operated high scale systems serving millions of users, and who can point to the trade offs they made to get there.</li><li>
Production experience with OpenSearch or Elasticsearch: indexing strategy, query and relevance tuning, and keeping clusters healthy under load.</li><li>
Strong distributed systems and systems design skills, with the ability to reason about consistency, latency, failure modes, and scale.</li><li>
Hands on AWS experience running services in production.</li><li>
Fluency in backend development with Python and TypeScript, designing and building APIs and services across SQL and NoSQL stores.</li><li>
A genuine passion for shipping product features with a high level of autonomy and agency, taking an idea from problem to production with minimal hand holding.</li><li>
Excellent communication skills and a track record of working closely with Product and Design to turn ambiguous goals into shipped features.</li></ul>
Also valued<ul><li>
Solid engineering craft: maintainable code, code review, pairing when it helps, and meaningful tests.</li><li>
Building for stability, security, observability, and performance, not just the happy path.</li><li>
A commercial mindset that connects your work to business outcomes.</li><li>
You use AI tools as a core part of how you build, from coding assistants to AI driven workflows, and you have a strong sense of where they speed you up and where they need checking.</li></ul>
Where you&rsquo;ll be
At Zoopla, we embrace hybrid working but emphasise the importance of also spending time together. You&rsquo;ll have the opportunity to work remotely (at home) for two days per week with Mondays and Thursdays as all-Zoopla days in the office together plus a third day in-office day of your choosing.
Our home in Tower Bridge is a buzzing hub for collaborative and individual working, with areas to socialise and exercise - within easy reach of London Bridge, Tower Hill and Bermondsey stations. On our doorstep there are plenty of great food spots including a new indoor street food market and landscaped areas to sit by the riverside. 
Benefits 
<ul><li>
Our hybrid setup means you&rsquo;ll join us in the Tower Bridge office 3 days each week</li><li>
25 days annual leave + additional leave benefits Including extra days for length of service, plus other leave perks</li><li>
Cycle to work and electric car schemes</li><li>
Free Calm App membership</li><li>
Enhanced Parental leave</li><li>
Fertility Treatment Financial Support</li><li>
Group Income Protection and private medical insurance</li><li>
Gym on-site in London</li><li>
7.5% pension contribution by the company</li><li>
Discretionary annual bonus up to 10% of base salary</li></ul></div>

Senior Backend Engineer (Search)

Lottie

<div>Title: Senior Growth Engineer
Department: Engineering
Salary: &pound;75,000 - &pound;95,000
Benefits &amp; Culture: Lottie&rsquo;s careers page here, Lottie&rsquo;s tech careers page here
Meet our CTPO: Solving hard problems in care
Equity: A very generous EMI share offering.
Holiday: 26 days + bank holidays.
Mission: Elevate later life for everybody and build the care sector of the future.
Office Policy: Hybrid with a two core office days per week.
Office Location: London Bridge, London, UK<h1 class="jobSectionHeader">
The Opportunity:</h1>
Lottie's marketplace connects millions of families with the right care at the right time. We've built something real - now we need to grow it faster, smarter, and with more precision than a traditional engineering team can.
We're looking for a Senior Growth Engineer to join a small, focused Marketplace team and own the full experiment loop - from hypothesis to code to result. You'll work closely with a PM and designer to run high-velocity tests, feed signal back to Google to sharpen our ad performance, and build the lightweight tooling that lets us learn faster than our competitors.
This is a role for someone who ships first, learns fast, and doesn't look back. If you need things to be perfect before they go live, this probably isn't the right fit.<h1 class="jobSectionHeader">
What does this role involve?</h1><ul><li>
Running end-to-end experiments across Lottie's marketplace, from ideation through implementation to result analysis</li><li>
Building and optimising conversion-focused front-end experiences, often with limited design input</li><li>
Writing code that sends performance data back to Google to improve ad targeting and campaign efficiency</li><li>
Automating parts of our Google Ads configuration and campaign management</li><li>
Owning A/B test pipelines and iterating quickly based on real usage data</li><li>
Working autonomously within a lean, fast team</li></ul><h1 class="jobSectionHeader">
What problems will you be solving?</h1><ul><li>
Turning traffic into outcomes. Our marketplace is trusted by half a million families a month. You'll be closing the gap between the families who land on Lottie and the ones who find the right care. Every experiment you run is a chance to make that faster, clearer, and more effective.</li><li>
Making our ad spend smarter. You'll build the pipelines and integrations that help Google understand what a good Lottie outcome looks like, so our campaigns optimise toward the things that actually matter.</li><li>
Moving fast in a space that matters. Care decisions are urgent and emotionally charged. Getting families to the right information faster isn't just a conversion metric. It's a meaningful outcome for real people.</li></ul><h1 class="jobSectionHeader">
We think you&rsquo;ll be a great fit if&hellip;</h1><ul><li>
You have 5+ years of software engineering experience, front-end leaning with genuine full-stack breadth</li><li>
You think in experiments. You can articulate what moved because of your work, not just what you built</li><li>
You're comfortable with throwaway work. When a test fails, you kill it and move on</li><li>
You're autonomous and low-dependency. You thrive with a hypothesis and a deadline, not a detailed spec</li><li>
You're data-driven. You define success before you build, and you look at the numbers before you declare a win</li><li>
AI tools like Claude Code are already a big part of how you work, and you&rsquo;re hungry to get better at them</li></ul>
Sound like you but not quite 100%? Apply anyway - we're looking for potential and passion, not perfect CV match!<h1 class="jobSectionHeader">
This role isn&rsquo;t for you if&hellip;</h1><ul><li>
You prefer depth over breadth and one big build over many small bets</li><li>
You need clearly scoped requirements before you can move</li><li>
You're looking for a team with lots of process and structure around you</li><li>
Our mission to transform later life care doesn't resonate with you</li></ul><h1 class="jobSectionHeader">
Lottie&rsquo;s Interview Process</h1><ul><li>
Intro call with our Talent Lead (20 min, remote)</li><li>
Engineering Manager interview (45 min, remote)</li><li>
Technical assessment: coding pairing session and 2nd session (1h each, remote)</li><li>
Behavioural interview with Hiring Manager (45 mins, remote)</li><li>
Final interview with Will Donnelly, Co-Founder &amp; CEO (30 mins, in person, London Bridge)</li></ul>
Candidate Experience: All candidates will be informed of their application status.<ul><li>
Pre-Screen &amp; First Interview: You'll receive an email notification, but no specific feedback will be provided at this stage.</li><li>
Hiring Manager Interview: If you are unsuccessful after this interview, you will receive constructive feedback via email.</li><li>
Technical Interviews: If you are not successful after these, you'll receive constructive feedback via email and be offered a debrief call with our Talent Lead.</li><li>
Final Interview: For final-stage candidates who are not offered the role, we will provide your feedback live via a phone call.</li></ul><h1 class="jobSectionHeader">
Meet Lottie</h1>
Founded in London in July 2021, Lottie is a fast growth HealthTech start-up aiming to build the world&rsquo;s first SaaS enabled marketplace for care and with a goal of allowing families to seamlessly book care online in a similar manner to reserving a holiday stay via Airbnb or Expedia.
Since launching in July 2021, Lottie has supported millions of care seekers find the right care for loved ones and has raised over &pound;25m from leading venture capital funds including Accel, General Catalyst and Kindred, as well as from well known technology entrepreneurs including Mike Hudack (ex-CPTO of Deliveroo &amp; Monzo) and Tom Blomfield (ex-CEO of Monzo Bank). More recently, Lottie was the acclaimed winner of LinkedIn and Startup.co.uk Top Startup awards.
As of today, Lottie offers four core products and services, including:<ul><li>
Lottie (B2B2C Marketplace) - Free service that helps families find the UK&rsquo;s best care homes and home care services.</li><li>
Found by Lottie (B2B Vertical SaaS) - AI-native OS software supporting care providers to effectively manage their enquiries, occupancy and finances.</li><li>
Seniorcare by Lottie (B2B Vertical SaaS) - Employee benefit helping companies deliver outstanding eldercare support to their employees.</li><li>
Eliza by Lottie (B2B Vertical SaaS) AI agents that handle care home enquiries - so no family goes unanswered. Launch video here.</li></ul><h1 class="jobSectionHeader">
Why Lottie?</h1><ul><li>
Career Opportunity - A rare chance to own the full growth loop with real autonomy and real impact from day one.</li><li>
Early Hire Benefits - Be an early hire at one of the UK&rsquo;s fastest growing startups and benefit from fast career progression, as well as a generous stock options package.</li><li>
Mission - Tech for good that aims to build the care industry of the future and to positively impact millions of peoples lives. Care is one of the final remaining large consumer industries that is yet to be disrupted and positively revolutionised by technology.</li><li>
Investors - Series A backed startup having raised &pound;25m+ from tier 1 venture capital investors including Accel and General Catalyst.</li><li>
Global Opportunity &amp; Scalability - Be part of a company that is solving a real tangible problem that every family around the world faces at some point in their life.</li><li>
People - Join a kind, talented and mission driven team that loves coming to work every day.</li><li>
Culture - Excellent employee compensation/benefits, hybrid office policy and outstanding company culture with a 4.9/5 employee review score on Glassdoor.</li><li>
Award Winning - Acclaimed winner of LinkedIn&rsquo;s 2024 &ldquo;Top Startups&rdquo; and named &ldquo;the UK&rsquo;s number one startup for 2025&rdquo; in Startup.co.uk 100 Index.</li></ul> 
We want to create an inclusive environment that celebrates the diversity of our people whilst enabling them to do the best work of their careers. We are committed to ensuring that all our people processes are equitable. All applicants will be considered for employment without attention to ethnicity, religion, sexual orientation, gender identity, family or parental status, national origin, veteran, neurodiversity status or disability status.
If you require reasonable accommodations during the application or interview process, please let us know at Alice.Rooke@lottie.org
Compensation Range: &pound;75K - &pound;95K</div>

Senior Growth Engineer

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