Senior Full Stack Engineer

dunnhumby is the global leader in Customer Data Science partnering with the worlds 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 2500 experts in offices throughout Europe Asia Africa and the Americas working for transformative iconic brands such as Tesco Coca-Cola Nestlé Unileverand Metro.

Were looking for a Senior Full Stack Engineer to join our Application Platform team in Manchester on a hybrid basis. Youll be one of the first product engineers on dunnhumbys 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.

What we expect from you:

• Senior-level experience building and running production services in C# / Core and
• Comfortable owning a service on Kubernetes deployments probes autoscaling NetworkPolicies 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 PostgreSQL Key Vault) and willing to learn the other.
• Clear written communication RFCs ADRs runbooks PR descriptions other engineers can act on.

Nice to have:

• Crossplane experience authoring Compositions CompositeResourceDefinitions or custom providers.
• GitOps fluency with ArgoCD and Helm and CI/CD authorship in GitLab.
• 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.

Responsibilities:

• Shape clear testable acceptance criteria with Product and Design
• Build and own endtoend products services TypeScript frontend PostgreSQL and GitOps deployment
• Design scalable backend systems (APIs event handling clean architecture patterns)
• Deliver highquality frontend experiences with accessible components and strong data/state management
• Work with cloudnative 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 costaware approach to scaling and resource usage
• Participate in an oncall rotation once ramped up
• Use AIassisted development tools (e.g. Copilot Claude) effectively in daytoday work

What you can expect from us

We wont just meet your expectations. Well defy them. So youll enjoy the comprehensive rewards package youd 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.

Youll 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 dont 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)