Description
Andersen is hiring a Senior Backend Developer (.NET) in the EU for a project developing a digital insurance platform and delivering secure, scalable APIs and seamless system integrations. The customer is a large international organization operating in the insurance and risk protection domain, providing a wide range of services for both individual and corporate clients.
Responsibilities
•Designing and building .NET 8 microservices – FastEndpoints, clean architecture (Domain / Application / Infrastructure / API layers).
•Implementing Temporal workflow orchestration – typed workflow and activity interfaces, cross-task-queue dispatch, signal/query patterns.
•Building rules evaluation integrations with GoRules ZEN engine (GoRules.Zen NuGet, Rust FFI in-process).
•Developing platform capabilities – config registry, rules API, workflow gateway, payment and policy adapters.
•Implementing cross-cutting concerns – Managed Identity service-to-service auth, Cerbos authorization integration, structured logging via Serilog/Anotar.
•Writing and maintaining xUnit tests – FakeItEasy for mocking, Shouldly for assertions; integration tests against real dependencies (no mock DB).
•Collaborating with platform and domain teams on API contracts, OpenAPI specs, and shared NuGet libraries.
Requirements
•Commercial experience with C# / .NET for 5+ years.
•Strong hands-on experience with .NET 8.
•Experience designing and developing microservices.
•Strong understanding of Clean Architecture, SOLID principles, and layered architecture.
•Strong understanding of distributed systems and asynchronous processing.
•Experience with system design, transactions, concurrency, idempotency, and error handling.
•Strong hands-on experience with Azure.
•Strong experience with Entity Framework Core.
•Experience writing unit and integration tests.
•Experience with Docker and containerized development.
•Ability to independently and quickly learn new technologies and libraries.
•Willingness to study project-specific libraries before the technical interview.
•Level of English – Intermediate+ and above.
Nice to have
•Experience with Temporal workflow orchestration and Temporal .NET SDK.
•Experience with FastEndpoints.
•Experience with GoRules ZEN, JDM, and ZEN expressions.
•Experience with Cerbos.
•Experience with JSONata .NET.
•Experience with Azure Key Vault, Managed Identity, Blob Storage, and Application Insights.
•Experience with xUnit, FakeItEasy, and Shouldly.
•Experience with Podman / Podman Compose.
•Experience with ASP.NET Core Minimal APIs.
•Experience with Kafka and event-driven architecture.
•Experience with SOAP/WCF integrations.
•Experience with Result/Maybe patterns.
Conditions
•The opportunity to change the project and/or develop expertise in an interesting business domain.
•Job conditions – you can work both fully remotely and from the office or can choose a hybrid variant.
•Guarantee of professional, financial, and career growth; mentoring and adaptation systems for each new employee.
•The opportunity to earn up to an additional 1,000 EUR per month, depending on the level of expertise, which will be included in the annual bonus, by participating in the company's activities.
•Access to the corporate training portal, where the entire knowledge base of the company is collected and which is constantly updated.
•Bright corporate life (parties / pizza days / PlayStation / fruits / coffee / snacks / movies).
•Certification compensation (AWS, PMP, etc).
•Referral program.
•Private health insurance and sports compensation, depending on the type of employment.
