Senior React Engineer in London

We are evolving and optimising the acquisition journey at the company — and we’re looking for a Senior React Engineer to help lead the way. Sitting within our Customer Channels engineering team, you’ll play a key role in designing, building and evolving business-critical applications that support our partner products, including brands like Argos and John Lewis. This is a hands‑on role where you’ll combine modern front‑end engineering and strong technical judgement to deliver high‑quality, scalable, secure solutions and shape how we build across multiple brands and platforms.

How you’ll contribute:

• Design, build and maintain scalable front‑end applications using modern React frameworks
• Contribute to architecture and engineering standards, helping shape how we build and evolve our platforms
• Support complex customer journeys, particularly within acquisition and onboarding experiences
• Work across the full lifecycle, including APIs and backend services where needed
• Take ownership of production quality, including monitoring, performance and on‑call support
• Champion best practice in engineering, including testing, accessibility, security and performance
• Mentor and support other engineers, setting the standard across the team
• Leverage AI tools (e.g. GitHub Copilot) thoughtfully to improve efficiency and code quality

What you’ll be working on:

• Building white‑label applications used across multiple brands
• Developing design systems to enable consistent, reusable UI development at scale
• Enhancing customer acquisition journeys and digital experiences
• Supporting shared platforms and infrastructure, working beyond just front‑end development

What we’re looking for:

You’re a strong senior engineer who combines technical depth with ownership and influence. You’re comfortable working in a regulated environment and confident contributing beyond just code. Strong communication skills are key as you will be working closely with senior stakeholders.

You’ll likely bring:

• Strong experience with React (Next.js, Remix or similar), TypeScript and modern front‑end development
• Experience building scalable UI systems, including design systems and component libraries (Storybook, atomic design)
• Solid understanding of API integration (RESTful services) and Node.js
• Experience working with micro‑frontend architecture and monorepos (e.g. Nx, Turborepo)
• Strong grounding in testing practices (TDD, quality, performance, accessibility)
• Exposure to DevOps / SRE concepts, including monitoring and production ownership
• A self‑starter approach, with the ability to influence decisions and improve how things are done

Why this role matters:

• Delivering seamless, scalable customer experiences across multiple brands
• Ensuring our platforms are secure, accessible and high‑performing
• Supporting faster delivery of new features and improvements
• Enabling a consistent and reusable approach to front‑end engineering across the company

At the company, we value all types of diversity. We’re an equal opportunity employer and believe that our differences create a vibrant, authentic working culture. We want all our colleagues to feel able to bring their whole selves to work. We don’t discriminate on the basis of protected characteristics or identities. We make sure that every job is crafted to be inclusive and that people with disabilities or caring responsibilities can take part in the application and interview process. Tell us if you need accommodations: We’ll put reasonable adjustments in place to support you. We work with Textio to make our job design and hiring inclusive.