Lead Engineer - Frontend

dunnhumby is the global leader in Customer Data Science empowering businesses everywhere to compete and thrive in the modern datadriven economy. We always put the Customer First.

Our mission: to enable businesses to grow and reimagine themselves by becoming advocates and champions for their Customers. With deep heritage and expertise in retail one of the worlds most competitive markets with a deluge of multidimensional data dunnhumby today enables businesses all over the world across industries to be Customer First.

dunnhumby employs nearly 2500 experts in offices throughout Europe Asia Africa and the Americas working for transformative iconic brands such as Tesco CocaCola Meijer Procter & Gamble and Metro.

We are seeking a Lead FrontEnd Engineer to drive excellence in frontend development and user experience for our highscale SaaS platform. This role will be instrumental in shaping the frontend architecture defining best practices ensuring high performance security and accessibility standards and mentoring engineers.

You will collaborate closely with backend engineers product teams UX designers and platform engineers to ensure our applications are scalable resilient and userfriendly. You will also work with New Relic and Google Lighthouse to monitor frontend performance and observability.

Key Responsibilities

• Technical Leadership: Define and establish frontend engineering best practices including architecture performance optimization and maintainability.
• FrontEnd Architecture: Design and implement scalable modular component architectures using ReactJS and optimize UI performance using tools like Google Lighthouse.
• Collaboration with Backend & BFF Teams: Work with backend teams to design API interactions that balance efficiency and security without overloading the frontend.
• Mentorship & Upskilling: Guide and mentor engineers establishing a strong frontend culture.
• CI/CD & Deployment: Improve frontend build pipelines automated deployments and observability using GitLab and Octopus Deploy.
• User Experience & Accessibility: Ensure the UI is fast accessible and intuitive aligning with UX design best practices.

Required Skills & Experience

• 8 years of frontend development experience with ReactJS TypeScript and JavaScript (ES6 Design patterns and modern UI frameworks.

• Experience with Micro Frontends architecture and component libraries (e.g. Storybook Material UI).
• Deep understanding of frontend performance optimization Core Web Vitals accessibility (WCAG) Webpack Bundle Analyzer and React Profiler.
• Experience integrating frontend applications with RESTful APIs and GraphQL.
• Strong knowledge of componentbased architectures and UI state management (Redux React Query etc..
• Handson experience with CI/CD pipelines automated testing (Jest Cypress React Testing Library) and deployment automation (GitLab Octopus Deploy).
• Experience working in cloudbased SaaS environments with GCP preferred.
• Strong collaboration skills to work effectively with crossfunctional teams including backend engineers UX designers and product managers.
• Experience with styledcomponents and Emotion in ReactJS for modular and scoped CSSinJS enabling efficient and dynamic styling.
• TestDriven Development (TDD) approach to ensure code reliability and quality in complex projects.
• Proficiency with Webpacks advanced features like treeshaking lazy loading codesplitting and bundle optimization.
• Indepth knowledge of Webpack Babel ESLint Prettier and other modern build tools and task runners for optimizing development workflows.

What you can expect from us

We wont just meet your expectations. Well defy them. So youll enjoy the comprehensive rewards package youd expect from a leading technology company. But also a degree of personal flexibility you might not expect. Plus thoughtful perks like flexible working hours and your birthday off.

Youll also benefit from an investment in cuttingedge technology that reflects our global ambition. But with a nimble smallbusiness feel that gives you the freedom to play experiment and learn.

And we dont just talk about diversity and inclusion. We live it every day with thriving networks including dh Gender Equality Network dh Proud dh Family dh One and dh Thrive as the living proof. We want everyone to have the opportunity to shine and perform at your best throughout our recruitment process. Please let us know how we can make this process work best for you. For an informal and confidential chat please contact to discuss how we can meet your needs.

Our approach to Flexible Working

At dunnhumby we value and respect difference and are committed to building an inclusive culture by creating an environment where you can balance a successful career with your commitments and interests outside of work.

We believe that you will do your best at work if you have a work / life balance. Some roles lend themselves to flexible options more than others so if this is important to you please raise this with your recruiter as we are open to discussing agile working opportunities during the hiring process.

For further information about how we collect and use your personal information please see our Privacy Notice which can be found (here)