Senior Frontend Software Engineer - Web

Job Description We are seeking a skilled and motivated Senior Frontend Software Engineer to join our Group Technology team in Milton Keynes. In this role, you will design and build the front end of our brand websites, migrating our portfolio onto a new headless content platform (Contentstack).

You will work closely with the technology and marketing teams to deliver reusable component libraries that can serve our many brands from a shared codebase, supporting a rolling schedule of brand go-lives. We offer a hybrid working arrangement with 2 days per week in our Milton Keynes office.

Key Responsibilities

Consume content from our headless CMS (Contentstack) via its APIs, agreeing content models and API contracts Build and maintain a reusable, themeable component library and page templates that serve multiple brands from a shared codebase Design and develop commercial/enterprise web applications, owning the architecture of the shared front-end platform Translate brand design systems and designs into accessible, responsive and high performing front-end code Deliver to defined standards for Core Web Vitals, WCAG accessibility and technical SEO, including structured data to support search and AI-driven discovery Provide technical leadership for the front end, including setting coding standards, supporting code reviews and mentoring other engineers Ensure application performance, quality, and responsiveness Support rolling brand go-lives, including theme onboarding, cross-browser and device testing, cutover support and post-launch fixes Experience and Skills Required:

Essential

Strong expertise in JavaScript/TypeScript and modern web architectures, specifically React and server-side rendering or static site generation (e.g. Next.js, Node.js) Proven experience designing and delivering enterprise-scale front-end applications Strong HTML5 and CSS skills, including responsive design and design-token based theming Experience building component libraries or design systems Strong knowledge of WCAG accessibility standards and web performance optimisation Experience consuming REST or GraphQL APIs, ideally from a headless CMS Developing and maintaining multiple connected software solutions Skilled in software testing methodologies including TDD, and front-end test tooling Experience with Git-based workflows, CI/CD pipelines and cloud hosting, ideally Azure Experience of working with AI in a software engineering team Highly

Desirable

Experience with a headless CMS such as Contentstack, Contentful or similar Knowledge of technical SEO, structured data and search/AI visibility optimisation Aw...

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