Senior Web Developer

dunnhumby; London; On-site; GBP 50,000 - 80,000; Full time

Job summary

A leading company in Customer Data Science is seeking a Senior Web Developer for their Retail Media team in London. You will leverage your expertise to integrate innovative web applications, optimize adtech functionalities, and collaborate with cross-functional teams to enhance digital experiences for major brands. Join us to shape the future of retail media!

Benefits

Flexible working hours

Birthday off

Qualifications

• Background in advertising or adtech.
• Familiarity with Google Ad platforms.
• Experience in digital media workflows.

Responsibilities

• Integrate adtech functions with key platforms.
• Maintain and enhance web frameworks for performance.
• Mentor junior developers.

Skills

Problem-solving

Communication

Collaboration

Tools

Google Ad Manager

React

Node.js

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 aSenior Web Developerto join ourRetail Mediateam 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

• Background in theadvertising or adtech space, with a solid understanding of digital media workflows
• Exposure toGoogle ad platforms, ideally includingGoogle 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.

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

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Global Diversity and Inclusion Questions

At dunnhumby, we utilise our diversity of thought as our competitive edge .

We are proud of our diversity and committed to making dunnhumby an even more inclusive place to work that we can be proud of.

Our diversity and inclusion work is designed tocultivate a culture of belonging,where every dunnhumbian feels safe to bring their whole self to work, where everyone is welcome and we practice what we preach.

We have a full D&I strategy to implement this long-term behaviour change; in addition, we have five employee-led network groups to support colleagues in the areas of gender, sexual orientation, multiculturalism, mental health and wellbeing, and family.