Job Description

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 world's 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're looking for a Senior Web Developer to join our Retail Media team at dunnhumby. ou'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
As a Senior Web Developer in our Retail Media team, you will:

• 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 us
We won't 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.
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