Senior Backend Engineer (.NET/C#) - Fulltime - EU/UK

About the company

Cera Care is Europe’s largest digital-first home care provider. We are rebuilding the technology platform
to be event-based, multi-tenant, and agent-ready using .NET on Kafka and Postgres for the new estate.
The legacy platform remains active while domains migrate.
Our small, senior team works closely with the business. We ship on a modern stack and use Claude
Code by default. We seek a pragmatic engineer who takes ownership across new and legacy platforms
and delivers reliably.

What You’ll Actually Do

• Work in a domain on the new platform. Scheduler, finance, care planning, operator surfaces, or whichever needs the next push. The architectural choices in your domain run for years.
• Ship .NET / C# across the event-sourced estate. Typed contracts, gateways, projections, the lot.
• Build agents as ordinary services. Bounded remit, defined role, audit trail, recall procedure. The same standards we apply to human operators.
• Migrate domains from the legacy platform. A bridge runs in parallel, so old and new live alongside until the evidence says it is safe to switch. Strong legacy-stack instincts matter here (as well as experience in implementing the Strangler Fig pattern to success).
• Push agentic coding. Claude Code, Copilot, Cursor, or whatever ships fastest. Contribute back our shared foundational framework.
• Sit with the business. Operations, clinical, finance, commercial. Understand how the work happens, then build from there.
• Keep CQC and clinical audit baked in. Audit by default is the architecture, not a feature.
• Own the platform. CI/CD, observability, deployment, AWS or GCP. Small team, you will touch everything.

What We’re Looking For

• Strong .NET / C# at senior level. Real command of the language and the runtime.
• Strong domain modelling / DDD experience. You know how to slice complex systems into the correct boundaries, lowering complexity and increasing maintainability and business cooperation.
• Event-sourcing, CQRS and event-streaming in production. Akka.NET,, EventStore, Marten, Kafka, or similar. You understand event-sourced systems beyond the marketing, where you apply and where you don’t.
• Postgres at scale. Schema design, performance, multi-tenant patterns.
• Real legacy-migration instinct. You have lifted production systems off old foundations onto new ones, with a bridge running in parallel, without breaking the business.
• Multi-tenant architecture. You know what makes tenant isolation real and what makes it leaky.

Who You Are

#####Six attributes we screen against as carefully as the technical bar:

• AI Native Expertise. Most of your daily work already runs through Claude Code, Copilot, or Cursor. You can point to what it has unlocked.
• Ownership Instinct. You see a problem, you take it. You do not wait for someone to assign it.
• Pragmatism. You ship the smallest thing that works, iterative over incremental.
• Business Curiosity. You go and find out how the work actually happens.
• Learning Speed. The stack changes; you do not get attached to what you learned last year.
• Low Ego. You can be wrong, change course, and credit others.

Carries Real Weight

• Regulated industry experience (health tech, social care, fintech, defence). Compliance and audit-aware engineering shortens ramp time.
• NHS-adjacent stack experience — FHIR UK Core, OMOP, SNOMED-CT, GP Connect, DTAC.
• Building LLM-powered features in production — evals, drift monitoring, observability.
• Scheduling, matching, or constraint-solving algorithms at production scale.
• Tele-ICU like, command-centre, or supervised-automation systems from any domain.

Why This Role

You will work on the platform Cera Care runs on. Cera reaches more clients than any other UK provider;
what you ship reaches real carers and real clients on day one. The team is senior, AI-native, and works
at pace.