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Senior Software Engineer - Backend

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About dunnhumby
dunnhumby is the global leader in Customer Data Science, helping the world's most ambitious retailers and brands put the customer at the heart of every decision. With nearly 3,000 experts across Europe, Asia, Africa and the Americas, we partner with iconic businesses like Tesco, Coca-Cola, Meijer, Procter & Gamble and Metro to turn data into growth, innovation and measurable value for their customers.

Tesco Media

Tesco Media is the ultimate media partner to brands. Built on unrivalled customer insight, it’s a media owner with soul, scale, and storytelling power. Tesco Media helps brands and agencies connect meaningfully with customers, drive creative effectiveness, and grow at the point of purchase.

About the Role

Retail Media is transforming how advertisers connect with consumers through personalised and targeted campaigns across retailers’ digital and physical touchpoints. As a Senior Software Engineer within Tesco Media, you will help build and scale products that enable advertisers and retailers to measure, optimise and improve campaign performance.
Working as part of a collaborative engineering team, you will contribute to the design, development and delivery of high-quality software solutions. You'll combine strong technical expertise with a customer-first mindset, helping create innovative products that drive measurable business value.

What You'll Be Doing

You'll play a key role in delivering reliable, scalable and maintainable software solutions.
  • Build and enhance customer-facing applications and platform capabilities using modern engineering practices.
  • Collaborate with Product Managers, Designers and Engineers to translate business requirements into technical solutions.
  • Design and develop scalable services, APIs and integrations that support Retail Media products.
  • Champion software quality through testing, code reviews, CI/CD practices and continuous improvement.
  • Contribute to technical discussions, knowledge sharing and the adoption of engineering best practices across the team.

What We're Looking For

You'll bring a strong software engineering foundation and a passion for solving complex technical challenges.
  • Experience developing and delivering scalable software applications in a modern engineering environment.
  • 6+ years of hands-on experience in backend development, focusing on performance, scalability, security, and maintainability.
  • Strong proficiency in C# and .NET Core, with expertise in developing RESTful APIs and
  • Drive code quality, ensuring adherence to best practices, design patterns, and SOLID
  • Experience with cloud platforms (Google Cloud Platform C Azure), implementing cloud-native best practices for scalability, security, and resilience.
  • Hands-on experience with containerization (Docker) and orchestration (Kubernetes, Helm).
  • Strong focus on non-functional requirements (NFRs) such as performance tuning, observability (monitoring/logging/alerting), and security best practices.
  • Experience implementing unit testing, integration testing, and automated testing
  • Proficiency in CI/CD automation, with