Middle .NET Backend Developer (German-speaking)

We are looking for a .NET Backend Developer to join our team! We’re building a large-scale, enterprise-grade web platform on a modular microservice architecture. As a backend engineer, you’ll own the full lifecycle of domain services — from data modelling and business logic through API design, messaging contracts, database migrations, and production deployment. You’ll work in a multi-vendor setup alongside DevOps, architecture, and product teams. Responsibilities: - Design, build, test, and operate microservices following a read/write service-pair pattern (read-only delivery APIs + write-capable update/ingestion services) - Implement event-driven communication between services - Own your domain end-to-end: schema design, API contracts, persistence, messaging, and production monitoring - Contribute to shared platform libraries and tooling - Document architectural decisions and service designs for both technical and non-technical stakeholders Required Technical Skills and Experience: - C# / .NET 8 / .NET Framework 4.7 — Web API development, modern C# features (records, pattern matching, nullable reference types, async/await best practices), experienced in both worlds - Entity Framework Core — code-first migrations, specification pattern, repository abstraction - Microservice architecture — clear separation of concerns across layered services (controller → service → repository) - Event-driven messaging — publishing and consuming messages on a service bus (MassTransit, NServiceBus, or similar), contract-first design, idempotency - Entity Framework Core — code-first migrations, specification pattern, repository abstraction - Authentication & Authorization — JWT validation, Azure AD / Entra ID, OIDC - Third-party API integrations (DAM systems, CRM/marketing platforms, email dispatch) Nice to have: - Event-driven messaging — publishing and consuming messages on a service bus (MassTransit, NServiceBus, or similar), contract-first design, idempotency - Azure — AKS (Kubernetes), Azure SQL, Blob Storage, Table Storage, Key Vault, Managed Identity, Azure Functions (isolated worker model), Azure AI Search - Experience with CDN cache invalidation (e.g. Akamai FastPurge API) - Redis caching strategies - Roslyn Analyzers / Code Fix Providers - PDF generation libraries Other Requirements: - Fluent German skills strongly preferred - Experience working in a client-facing role, interacting with both technical and non-technical stake-holders - Experience working in agile, multi-vendor environments - Must be fluent in English, written and verbal communications Відгукнутись на вакансію