Senior Full Stack Engineer

dunnhumby is the global leader in Customer Data Science, partnering with the world’s most ambitious retailers and brands to put the customer at the heart of every decision. We combine deep insight, advanced technology, and close collaboration to help our clients grow, innovate, and deliver measurable value for their customers.

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, Nestlé, Unilever and Metro.

We're looking for a Senior Full Stack Engineer to join our Application Platform team in Manchester, on a hybrid basis. You’ll be one of the first product engineers on dunnhumby’s new continuous‑deployment paved road, building a customer‑facing analytics product end‑to‑end and showing the rest of engineering what “production‑ready on the platform” looks like.

• Senior‑level experience building and running production services in C# / ASP.NET Core, or Type Script / Next.js / React — with working knowledge of the other side and an appetite to grow into both.
• Comfortable owning a service on Kubernetes — deployments, probes, autoscaling, Network Policies, RBAC — and debugging real failures from kubectl alone.
• Solid working knowledge of Kubernetes operators and CRDs — you understand reconciliation loops, custom resources, and how operator‑driven infrastructure differs from imperative provisioning.
• Hands‑on with at least one of GCP (GKE, Cloud SQL, Pub/Sub, Secret Manager) or Azure (AKS, Azure DB for Postgre
  
  SQL, Key Vault), and willing to learn the other.
• Clear written communication — RFCs, ADRs, runbooks, PR descriptions other engineers can act on.

• Crossplane experience — authoring Compositions, Composite Resource Definitions , or custom providers.
• Git Ops fluency with ArgoCD and Helm, and CI/CD authorship in Git Lab.
• Building custom Kubernetes operators with the Operator SDK or Kubebuilder.
• Service mesh experience (Istio or Linkerd).
• Prior experience migrating a product from bundled releases to continuous deployment.
• Backstage or internal developer portal contributions.

• Shape clear, testable acceptance criteria with Product and Design.
• Build and own end‑to‑end products across .NET services, Type Script frontend, Postgre
  
  SQL, and Git Ops deployment.
• Design scalable backend systems (APIs, event handling, clean architecture patterns).
• Deliver high‑quality frontend experiences with accessible components and strong data/state management.
• Work with cloud‑native, declarative infrastructure (Kubernetes, Crossplane, CRDs).
• Maintain high standards across testing (unit, integration, contract) and code quality.
• Apply strong security practices across backend and frontend systems.
• Build meaningful observability (tracing, logging, SLOs) focused on real user impact.
• Take a cost‑aware approach to scaling and resource usage.
• Participate in an on‑call rotation once ramped up.
• Use AI‑assisted development tools (e.g. Copilot, Claude) effectively in day‑to‑day work.

We’ll offer a comprehensive rewards package and personal flexibility, including flexible working hours, your birthday off, and thoughtful perks. You’ll benefit from investment in cutting‑edge technology while working in a nimble, small‑business environment that encourages experimentation and learning.

We value and respect difference and are committed to building an inclusive culture. We live diversity and inclusion every day through our thriving networks: dh Gender Equality Network, dh Proud, dh Family, dh One, dh Enabled and dh Thrive. We want everyone to have the opportunity to shine and perform at your best throughout the recruitment process. Please let us know how we can make this process work best for you.

We believe that you will do your best at work if you have a work/life balance. If flexible options are important to you, raise this with your recruiter; we are open to discussing agile working opportunities during the hiring process.

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