Senior Web Engineer

Ready for a challenge? Then Just Eat Takeaway.com might be the place for you. We're a leading global online food delivery platform, and our vision is to empower everyday convenience. Whether it's a Friday-night feast, a post-gym poke bowl, or grabbing some groceries, our tech platform connects tens of millions of customers with hundreds of thousands of restaurant, grocery and convenience partners across the globe.

We are looking for a Senior Web Engineer to join our cross-functional team dedicated to powering partner loyalty programmes across Just Eat Takeaway.com. In this role, you will focus on scaling and evolving our core partner loyalty offerings, from foundational initiatives like Stampcards to our newly launched Reorder Rewards programme. You'll collaborate closely with product and engineering teams across the business to deliver high-impact loyalty mechanics and roll these experiences out seamlessly to customers and restaurant partners across all of our global markets.

As a Senior Web Engineer, you will drive our frontend architecture, write scalable and thoroughly tested code, and mentor engineers while challenging the team to raise the technical bar. Cross-team collaboration and inner-sourced software development are our standard ways of working, giving you the opportunity to contribute to and influence shared codebases across the wider JET organization. True ownership is central to our engineering culture: we write it, and we own it. You will take end-to-end responsibility for the systems you build, including participating in our on-call rota to ensure our loyalty products remain resilient, performant, and reliable in production.

Location: Hybrid - 3 days a week from our London/Bristol office & 2 days working from home

Reporting to: Technology Manager

These are some of the key ingredients to the role:

• Drive Frontend Architecture: Lead the technical design, architectural patterns, and end-to-end implementation of resilient, scalable web applications using modern React and TypeScript.
• Shape Cross-Disciplinary Alignment: Partner closely with Product, UX, and Backend engineers to translate product roadmaps into sound technical designs, define API contracts, and evaluate feasibility early.
• Champion Web Performance & Accessibility: Take ownership of web vital metrics (Core Web Vitals, bundle size, rendering performance) and ensure rigorous compliance with accessibility standards (WCAG).
• Maintain Operational Reliability: Champion frontend observability and error monitoring in production, actively participating in the team's on-call rotation to diagnose and resolve critical user-facing issues.
• Raise the Engineering Bar: Mentor mid and junior engineers through pair programming and insightful code reviews, fostering a culture of technical excellence and shared best practices.

What will you bring to the table?

• Advanced React & TypeScript Expertise: Extensive experience architecting and maintaining production-grade web applications using modern React, TypeScript, and ecosystem frameworks (such as Next.js).
• Modern AI Engineering Practices: Hands‑on experience accelerating delivery with AI‑assisted coding tools, and the ability to guide teams on reviewing generated code, maintaining architectural consistency, and keeping automated test coverage high.
• Robust Automated Testing Strategy: Proven experience building multi-layered test suites-including unit/component tests (React Testing Library, Jest, or Vitest) and end-to-end integration tests (Playwright or Cypress).
• State Management & Data Architecture: Deep understanding of modern state management, caching, and data‑fetching patterns (e.g., TanStack Query, Redux Toolkit, or complex async flows like Redux-Saga).
• Accessible & Scalable UI Engineering: Comprehensive knowledge of semantic HTML, responsive layout patterns, modern CSS (e.g., CSS Modules, Tailwind, or CSS‑in‑JS), and practical implementation of WCAG accessibility standards across design systems.
• Frontend Delivery & Cloud Awareness: Practical familiarity with build tooling (e.g., Vite, Webpack), CI/CD pipelines, and cloud-based web delivery (e.g., AWS/GCP, CDN caching, serverless/edge rendering).
• Technical Leadership & Mentorship: Demonstrated ability to influence architectural decisions, author technical RFCs, conduct constructive code reviews, and mentor engineers to elevate team-wide standards.
• Collaborative Inner‑Source Mindset: Strong cross-functional communication skills, with an appetite for contributing to shared tools, platforms, and inner-sourced libraries across the wider engineering organization.

At JET, this is on the menu: Our teams forge connections internally and work with some of the best-known brands on the planet, giving us truly international impact in a dynamic environment. Fun, fast-paced and supportive, the JET culture is about movement, growth and celebrating every aspect of our JETers. Thanks to them we stay one step ahead of the competition.