Backend Developer (.NET) in the EU (Remote)

Czym będziesz się zajmować?

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.

Kogo poszukujemy?

Must-haves:

• Hands-on .NET (v6+) development experience, with .NET 8 required, for 3+ years.
• Strong understanding of Clean Architecture principles, including strict layer dependency rules, separation of business logic from the API layer, and Result-based error handling instead of exceptions for business errors.
• Hands-on experience with ITemporalClient, IWorkflow, IActivity, task queue registration, and cross-task-queue dispatch.
• Strong experience with Azure services, including Key Vault, Managed Identity, Blob Storage, and Application Insights.
• Experience with structured error-handling patterns; familiarity with Result/Maybe patterns preferred.
• Strong experience with Entity Framework Core or equivalent ORM technologies, including migrations, value objects, and aggregate roots.
• Hands-on experience with automated testing using xUnit, FakeItEasy, and Shouldly, including integration testing patterns.
• Strong hands-on experience with containerized local development using Docker, Podman, or equivalent technologies.
• Good understanding of Dockerfiles and multi-stage builds.
• Experience running and troubleshooting a complete local development stack with Podman Compose, including application services, Temporal, and databases.

Czego wymagamy?

3 lata doświadczenia na podobnym stanowisku
Znajomości:

• .NET
• Clean Architecture

Języki:

• Angielski

Jakie warunki i benefity otrzymasz?

• 6.6k–11.8k PLN brutto/m (Umowa o pracę)
• Umowa o pracę - Elastyczne godziny pracy (100%)
• Praca zdalna: W całości
• Ubezpieczenie, Pakiet sportowy
• Kawa / Herbata, Zimne napoje

Kim jesteśmy?

Andersen – your global software development partner Andersen is a global software development company with over 18 years of experience supporting businesses worldwide in their digital transformation.

Headquartered in Poland, we operate development centers across Germany, the USA, the UK, Lithuania, Hungary, Kazakhstan, Georgia, Azerbaijan, Cyprus, and the UAE, enabling us to deliver high-impact solutions close to our customers. We offer end-to-end IT services — from custom software development, API integration, and system architecture to legacy modernization and long-term support. With deep technical expertise and a focus on business value, we build tailored, scalable, and secure digital products. Harnessing the power of AI, Machine Learning, Data Science, Big Data, and Visual Technologies, we create intelligent, future-ready solutions that support digital transformation and solve real-world business problems.

Recognized among the world’s Top 1,000 B2B service providers, Andersen has earned the trust of industry leaders. Our portfolio includes long-term partnerships with Siemens, Samp;P Global, Ryanair, IHS Markit, TUI, Johnson amp; Johnson, T-Systems, and many more. With a team of 3,700+ highly qualified experts in 16+ global locations, we have successfully delivered over 1,000 projects across industries such as Healthcare, FinTech, Logistic, Automotive,

Manufacturing, E-commerce, Multimedia amp; Entertainment and more. Driven by responsibility, client-focus, and commitment to results, Andersen is your reliable tech partner for building high-ROI, future-proof digital solutions — anywhere in the world.