Senior Software Engineer(Frontend)

dunnhumby is the global leader in Customer Data Science, empowering businesses everywhere to compete and thrive in the modern data-driven 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 multi-dimensional data dunnhumby today enables businesses all over the world, across industries, to be Customer First.

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, Meijer, Procter & Gamble and Metro.

We are looking for a Senior Frontend Engineer to help build a modern, performant, and scalable frontend foundation for our retail media SaaS platform. You will be part of an agile squad working on independently deployable microfrontends built using React and TypeScript, supported by a shared monorepo, backend-for-frontend (BFF) APIs, and a robust CI/CD pipeline.

Youll collaborate across product, design, and engineering to deliver modular interfaces, contribute to architectural decisions, and set high standards for code quality, testing, and maintainability. If you enjoy solving complex problems, care deeply about frontend engineering excellence, and want to work on a modern tech stack that enables velocity and scale, wed love to hear from you.

Key Responsibilities

Frontend Engineering

• Build scalable, dynamic web applications using React, TypeScript, and modern JavaScript fundamentals.
• Develop accessible, responsive, and well-tested UI components using CSS-in-JS (Emotion), utility-first CSS, or similar approaches.
• Design and implement efficient state management patterns using Context API, Zustand, or Redux.

Microfrontend Architecture & Integration

• Contribute to the design and implementation of microfrontend architecture within a monorepo setup powered by Nx.
• Develop independently deployable modules with clear ownership and maintain reusable components using Storybook.

API Integration & BFF

• Integrate frontend components with RESTful and GraphQL APIs, using BFF layers built with Fastify or Express to simplify backend access and optimize performance.

Testing & CI/CD

• Maintain a high standard of code quality through unit and integration tests using Jest, React Testing Library, and Playwright.
• Work with DevOps to set up and maintain CI/CD pipelines using tools like GitLab CI, Octopus, and Docker for containerized frontend builds on Kubernetes.

Collaboration & Ownership

• Collaborate with backend engineers, UX designers, and product managers to ship high-quality, end-to-end solutions.
• Document decisions, mentor junior engineers, and contribute to continuous improvements in engineering practices and tooling.

Required Skills & Experience

• Experience from 5-8years only
• Strong hands-on experience with React, TypeScript, and modern JavaScript (ES6+)
• Deep understanding of state management, component design, and styling techniques
• Experience integrating APIs (REST/GraphQL) and handling async flows
• Proficiency in frontend testing frameworks (Jest, RTL, Playwright)
• Working knowledge of CI/CD workflows, especially using GitLab, Octopus, or equivalent
• Familiarity with monorepos and modular frontend architecture
• Good grasp of performance, accessibility, and browser compatibility
• Strong communication, documentation, and troubleshooting skills

Preferred Qualifications

• Experience with Nx, Webpack, or Vite for build optimization
• Exposure to microfrontend patterns and independent deployment
• Hands-on experience with Fastify/Express for backend-for-frontend (BFF)
• Understanding of frontend observability (New Relic, Sentry, Google Analytics)
• Familiarity with design systems and reusable UI libraries
• Knowledge of deploying applications on Google Cloud Platform (GCP) or Azure
• Comfortable working in agile squads with clear ownership and shared infrastructure

What Sets This Role Apart

• Opportunity to work at scale with a modern frontend stack and architecture that prioritizes performance and autonomy
• Be part of a team that values modular delivery, shared responsibility, and technical excellence
• Exposure to cutting-edge CI/CD, Kubernetes, and containerized frontend builds
• A collaborative environment that encourages ownership and continuous learning

What you can expect from us

We wont just meet your expectations. We'll defy them. So you'll enjoy the comprehensive rewards package you'd 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.

You'll also benefit from an investment in cutting-edge technology that reflects our global ambition. But with a nimble, small-business feel that gives you the freedom to play, experiment and learn.

And we don't 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, dh Enabled 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.

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.