SeniorFrontendEngineer

dunnhumby is the global leader in Customer Data Science, partnering with the world’s most ambitious retailers and brands to put the customer at the heart of every decision. We combine deep insight, advanced technology, and close collaboration to help our clients grow, innovate, and deliver measurable value for their customers. dunnhumby employs nearly 2,500 experts in offices throughout Europe, Asia, Africa, and the Americas working for transformative, iconic brands such as Tesco, Coca-Cola, Nestlé, Unilever and Metro. Most companies try to meet expectations, dunnhumby exists to defy them. Using big data, deep expertise and AI-driven platforms to decode the 21st century human experience – then redefine it in meaningful and surprising ways that put customers first. Across digital, mobile and retail. For brands like Tesco, Coca-Cola, Procter & Gamble and PepsiCo. We’re looking for a Senior Engineer to join our team and help build and evolve the company’s design system. This role focuses on developing high-quality, reusable React components and supporting the infrastructure required to build, test, and release them. Key Responsibilities Conduct requirements analysis for new components and enhancements. Develop new react components, and maintain our existing components. Provide advice and guidance to junior colleagues as required to resolve specific challenges they're having and conduct design and code reviews. Work with consumers to support integration, and investigate and address any issues. Pass on knowledge through documentation and presentations to prevent key person dependencies. Identify and advise on improvement opportunities and automate and simplify, test, and operations processes. Essential Skills(Must Have) React.js TypeScript/JavaScript CSS HTML Desirable Skills(Good to have) React Testing Library Vite Playwright Jira Gitlab Desirable Experience Building and maintaining design systems or UI component libraries Practical experience with accessibility (WCAG 2