Senior Product Engineer

Zapp; Greater London; Hybrid; GBP 100,000 - 135,000; Full time

Benefits offered by this job

£100,000 – £135,000 base salary

Equity package

25 days holiday + bank holidays

Private health insurance

Enhanced sick pay and parental leave

Cycle to work

Job summary

Zapp is seeking a senior full‑stack engineer in London for a hybrid role. You will own end-to-end delivery across backend, web, and mobile features, and help shape AI-powered product enhancements.

You will work with TypeScript, GraphQL, and SQL, using NestJS and React. A strong cloud, DevOps mindset, and on-call responsibility are required for this hands-on role in a fast-moving, customer-focused team.

Qualifications

• 5+ years building production software.
• Strong Full-stack capabilities across backend, web, and infrastructure.
• Proficiency in TypeScript, GraphQL, and SQL.
• Experience with NestJS and React.
• Experience with cloud platforms (GCP or similar) and CI/CD.
• Ability to build AI-powered features daily.

Responsibilities

• Build a world-class customer experience across the stack.
• Ship across backend, web, and infrastructure, and into mobile when features cross over.
• Bring AI into daily work and share patterns.
• Prototype AI features and bring to life.
• Own delivery end-to-end from design to production.
• Own on-call and production reliability.
• Improve latency and release processes.
• Contribute to architectural discussions and patterns.

Skills

Senior engineer

Full-stack

TypeScript

GraphQL

SQL

NestJS

React

Cloud

CI/CD

Testing

AI integration

API design

Observability

Security

Communication

Tools

Kubernetes

Terraform

CI/CD tooling

Job description

Location: Nine Elms, London. Full time- hybrid with at least 3 days a week on site. You'll need the right to work in the UK and be based in London. We are not able to offer visa sponsorship for this role.

The Role

Join Zapp and take full lifecycle ownership of the apps our customers use every day. We're building a world-class experience across iOS, Android, and web, and you'll help us get there.

Quick commerce moves fast and lives in the real world. AI is changing how we build it. That's the part we love. We need engineers who are curious, energetic, and thrive at the front line of both.

What You'll Do

• Build a world-class customer experience across the stack. Ship across backend, web, and infrastructure, and into mobile when features cross over.
• Bring AI into how we build. Use AI in your daily work. Share patterns that help the team move faster, and learn from what others discover.
• Help shape AI in our product. AI features in our app are still early. Spot the customer moments where AI can create magic, prototype them, and bring them to life.
• Own delivery end-to-end. Pick up a problem, design the solution, ship the work wherever the feature lives, and see it through to production.
• Own on-call. Be on the rotation, and stand behind what you ship in production.
• Keep production fast and trusted. Watch latency, harden release processes, and protect what customers rely on.
• Raise the bar for the team. Contribute to architectural discussions and the patterns that shape our codebase. Lift the people around you.

You're a great fit if you

• Senior engineering experience. 5+ years building production software.
• Full-stack range. Comfortable across backend, web, and infrastructure.
• Strong fundamentals. Confident with TypeScript, GraphQL, and SQL. At home in NestJS (or a similar Node.js framework) and React.
• Cloud and DevOps minded. Comfortable across GCP or a similar cloud, CI/CD, observability, and modern infrastructure tooling.
• Use AI daily. AI assistants are part of how you build. You bring back patterns that help others get more out of them too.
• Think product, not just code. You measure your work by what changed for the customer, not the lines of code shipped.
• Production minded. Solid grasp of API design, observability, scaling, reliability, and security.
• Care about craft. Clean APIs, attention to detail, and how the system feels to work in.
• Comfortable in uncertainty. You move forward when the path isn't clear, instead of waiting for someone to define it.
• Test as you build. Automated tests are how you ship code you trust.
• Passionate about execution. Curiosity, energy, and a habit of moving things forward.
• Excellent communicator. Clear in how you write and speak, and you love sharing what you learn.

Even better if you know

• NestJS. Our backend is a NestJS service, and you'd feel at home when features need backend work.
• React Native. Our apps run on React Native and Expo. You'll touch them when features cross stack boundaries.
• GraphQL Federation. We run a federated gateway across multiple subgraphs, and federation experience makes schema and subgraph work easier.
• Distributed systems at scale. Event-driven patterns, async processing, real-time data flows.
• Infrastructure as code. Terraform, Kubernetes, or similar.
• Quick commerce or similar domain. Logistics, on-demand delivery, or another real-time, high-throughput customer-facing environment.

You won't be a great fit if

• Need a fully defined process and a large, structured team to do your best work.
• Chase technical perfection at the expense of what the customer actually needs.
• Stall when the path forward isn't clear, or wait to be told what to do.
• Want to stay strictly inside your specialty and avoid unfamiliar parts of the stack.

Benefits

• £100,000 – £135,000 base salary, depending on experience.
• Equity package, depending on experience.
• 25 days of holiday per year, plus all bank holidays.
• Private health insurance.
• Enhanced sick pay and maternity or paternity leave.
• Cycle to work scheme.