Senior .NET Engineer (#5461)

• 4+ years of C# and .NET backend development experience with solid knowledge of ASP.NET and ASP.NET Core.
• Proven hands-on experience migrating .NET Framework applications to .NET Core / .NET 8, .NET 10 in production.
• Solid experience with Entity Framework Core.
• Strong knowledge of DDD, CQRS, and repository patterns in layered .NET architectures.
• Familiarity with Docker multi-stage builds and Linux container fundamentals for .NET applications.
• Proficient with xUnit and Moq for unit testing; comfortable with container-wired test setups.
• Experience with AWS ECS, Fargate, and ECR for deploying containerized .NET applications.
• Familiarity with MassTransit and RabbitMQ or Amazon MQ for event-driven messaging.
• Experience with Hangfire or similar background job processing frameworks.
• Proficient in Git and familiar with Agile/SCRUM team processes.

Nice to have:

• Experience building CI/CD pipelines for .NET projects.
• Familiarity with micro-frontend architecture and Angular-based single-page applications.
• Experience with automated code coverage tooling and enforcing coverage thresholds in CI.
• Experience with performance optimization and scalable enterprise backend systems.

• Migrate a .NET Framework 4.8 application to .NET 10.
• Migrate a large database-first Entity Framework 6 model to EF Core 8 across multiple bounded contexts.
• Identify and replace Windows-only libraries and assembly references to enable Linux compatibility.
• Establish unit test coverage measurement and enforce quality gates as part of the migration pipeline.
• Collaborate with DevOps engineer on Dockerfile authoring, environment configuration, and secrets injection.
• Participate in Agile/SCRUM processes, conduct code reviews, and document migration decisions.

N-iX Krakow, ​Zabłocie Business Park business centre, Zabłocie 43A, 30-701​​