Senior Full Stack Engineer

Salary: £85,000 - 85,000 per year

Requirements:

• Senior-level experience building and running production services in C# / ASP.NET Core and TypeScript / Next.js / React, with working knowledge of the other side and an appetite to grow into both
• Comfortable owning a service on Kubernetes, including deployments, probes, autoscaling, NetworkPolicies, and RBAC, and debugging real failures from kubectl alone
• Solid working knowledge of Kubernetes operators and CRDs, including reconciliation loops, custom resources, and how operator-driven infrastructure differs from imperative provisioning
• Hands-on experience with at least one cloud platform such as GCP or Azure, including relevant services like GKE, Cloud SQL, Pub/Sub, Secret Manager, AKS, Azure Database for PostgreSQL, or Key Vault, and willingness to learn the other
• Clear written communication skills for producing RFCs, ADRs, runbooks, and actionable PR descriptions
• Nice to have: Crossplane experience, including authoring Compositions, CompositeResourceDefinitions, or custom providers
• Nice to have: GitOps fluency with ArgoCD and Helm, and CI/CD authorship in GitLab
• Nice to have: Experience building custom Kubernetes operators with Operator SDK or Kubebuilder
• Nice to have: Service mesh experience with Istio or Linkerd
• Nice to have: Prior experience migrating a product from bundled releases to continuous deployment
• Nice to have: Contributions to Backstage or an internal developer portal

Responsibilities:

• Shape clear, testable acceptance criteria with Product and Design
• Build and own end-to-end products across .NET services, TypeScript frontend, PostgreSQL, and GitOps deployment
• Design scalable backend systems, including APIs, event handling, and clean architecture patterns
• Deliver high-quality frontend experiences with accessible components and strong data and state management
• Work with cloud-native, declarative infrastructure including Kubernetes, Crossplane, and CRDs
• Maintain high standards across testing, including unit, integration, and contract testing, as well as code quality
• Apply strong security practices across backend and frontend systems
• Build meaningful observability through tracing, logging, and SLOs focused on real user impact
• Take a cost-aware approach to scaling and resource usageParticipate in an on-call rotation once ramped up
• Use AI-assisted development tools effectively in day-to-day work

Technologies:

• AI
• ASP.NET
• ArgoCD
• Azure
• Backend
• C#
• CI/CD
• Cloud
• Frontend
• GCP
• GitLab
• GitOps
• Helm
• Istio
• Support
• Kubernetes
• PostgreSQL
• REST
• RBAC
• React
• SQL
• Security
• TypeScript
• Copilot
• DevOps
• Network
• Fullstack

More:

We are dunnhumby, the global leader in Customer Data Science, partnering with ambitious retailers and brands to put the customer at the heart of every decision. Our team of nearly 2,500 experts works across Europe, Asia, Africa, and the Americas for transformative brands including Tesco, Coca-Cola, Nestlé, Unilever, and Metro. We are hiring a Senior Full Stack Engineer to join our Application Platform team in Manchester on a hybrid basis. You will be one of the first product engineers on our new continuous-deployment paved road, building a customer-facing analytics product end to end and helping show the rest of engineering what production-ready on the platform looks like. We offer a comprehensive rewards package, flexible working hours, your birthday off, cutting-edge technology, and a collaborative culture with strong support for diversity, inclusion, and flexible working.