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Senior Web Developer

role at

dunnhumby

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 is to enable businesses to grow and reimagine themselves by becoming advocates and champions for their Customers. With deep heritage in retail, dunnhumby enables businesses across industries to be Customer First. We employ nearly 2,500 experts in offices around the world, working with brands such as Tesco, Coca-Cola, Meijer, Procter and Gamble and Metro.

We’re looking for a

Senior Web Developer

to join our

Retail Media

team. You’ll play a key role in integrating innovative, scalable, and high-performance web applications that power retail media solutions for some of the world’s biggest brands and retailers. As part of a cross-functional team, you’ll collaborate with product managers, designers, data scientists, and engineers to deliver seamless digital experiences that help retailers monetise their media assets and drive measurable outcomes for advertisers.

What You’ll Do

Support the technology and integration of our adtech functions, ensuring seamless connectivity with key platforms like Google Ad Manager

Regularly test, maintain, and enhance our web frameworks to ensure performance, reliability, and scalability

Troubleshoot and resolve technical issues across the stack, from frontend bugs to backend integration challenges

Collaborate closely with internal product teams and stakeholders to align technical solutions with business goals

Lead the integration of our systems with third-party ad servers and platforms, particularly Google’s adtech ecosystem

Contribute to the continuous improvement of our development practices, including code reviews, testing, and deployment automation

Mentor junior developers and share knowledge across the team

What We’re Looking For

Strong experience with core web technologies: HTML, CSS, and JavaScript

Background in the advertising or adtech space, with a solid understanding of digital media workflows

Exposure to Google ad platforms, ideally including Google Ad Manager

Proven ability to engage and collaborate with stakeholders across product, tech, and commercial teams

Familiarity with modern frontend frameworks (e.g. React) and backend technologies (e.g. Node.js) is a plus

A proactive mindset with strong problem-solving and communication skills

What You Can Expect From UsWe won’t just meet your expectations. We’ll defy them. You’ll enjoy the comprehensive rewards package you’d expect from a leading technology company, plus flexible working options, thoughtful perks like flexible hours and your birthday off. You’ll benefit from an investment in cutting-edge technology that reflects our global ambition, with a nimble, small-business feel that gives you freedom to play, experiment and learn. We live our commitment to diversity and inclusion through networks such as dh Gender Equality Network, dh Proud, dh Family, dh One, dh Enabled and dh Thrive. If you need adjustments to the recruitment process, please let us know how we can help.

Our approach to Flexible WorkingAt 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 outside of work. If flexible options are 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) .

Seniority level

Mid-Senior level

Employment type

Full-time

Job function

Engineering and Information Technology

Industries

Technology, Information and Media

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