We are looking for an experienced Senior Full Stack .NET Engineer to join an international engineering team working on production applications and distributed systems.
This is a backend-focused Full Stack role, with the main focus on C#/.NET development, backend services, APIs, databases, and distributed systems. You will also contribute to frontend development using React when needed.
This is a hands-on engineering position. You will build, maintain, debug, and improve production systems, taking ownership of code quality, performance, and reliable delivery.
Location: Remote (EU only) Engagement: Full-time contract Start Date: ASAP Experience: 5+ years Language: English
Key Responsibilities * Design, develop, and maintain production applications using C# and .NET. * Build backend services, APIs, and system-level components. * Write and optimize complex SQL queries for performance and scalability. * Debug production .NET applications, including memory, concurrency, and performance issues. * Contribute to frontend development using React when required. * Work with microservices and distributed system architectures. * Build and maintain unit, integration, and end-to-end tests. * Deploy and maintain services in containerized Kubernetes environments. * Implement logging, monitoring, metrics, tracing, and alerting. * Identify technical blockers and delivery risks early. * Participate in technical design and architecture discussions. * Communicate technical decisions and trade-offs clearly to engineers, Product Managers, and other stakeholders. * Participate actively in code reviews and support other engineers through knowledge sharing and mentoring. * Use AI coding tools such as Claude, Cursor, or GitHub Copilot responsibly while maintaining ownership of code quality and security.
Required Experience * 5+ years of backend and systems engineering experience in production environments. * Strong commercial experience with C# and .NET. * Strong knowledge of modern C#, including async/await, generics, LINQ, records, pattern matching, and nullable reference types. * Good understanding of the .NET runtime, garbage collection, memory management, and application performance. * Strong understanding of asynchronous programming and concurrency. * Experience with ASP.NET Core, including web APIs, minimal APIs, gRPC services, or background workers. * Strong production debugging and troubleshooting skills. * Experience diagnosing exceptions, memory leaks, deadlocks, and performance bottlenecks. * Understanding of dependency injection, configuration, and modern .NET hosting patterns. * Experience with CI/CD and production deployment workflows. * Strong automated testing experience using xUnit, NUnit, MSTest, or similar tools. * Experience with mocking frameworks such as Moq or NSubstitute. * Hands-on experience using AI-assisted/agentic coding tools.
SQL and Data * Strong SQL skills, including complex joins, window functions, indexing, and query optimization. * Production experience with relational databases such as SQL Server, PostgreSQL, MySQL, or similar. * Experience with Entity Framework Core and/or Dapper. * Ability to understand when ORM solutions are appropriate and when hand-written SQL is required.
Infrastructure and Operations * Experience working with Kubernetes and containerized environments. * Ability to deploy, scale, monitor, and troubleshoot containerized services. * Experience with observability and monitoring for production distributed systems. * Experience with tools or technologies such as Serilog, OpenTelemetry, Jaeger, Prometheus, Grafana, or Application Insights.
Nice to Have * Strong experience with microservices and distributed systems. * Experience with service decomposition, gRPC, message queues, eventual consistency, and failure handling. * Experience with React and micro frontend architectures. * Experience integrating React applications with .NET backend services. * Experience with Azure or AWS, including managed services, IAM, networking, and infrastructure as code. * Experience modernizing or migrating legacy .NET Framework applications to modern .NET.
What We’re Looking For
The ideal candidate is a strong hands-on .NET engineer who is comfortable taking ownership of production systems rather than working only on prototypes or proof-of-concept projects.
We’re looking for someone who: * Is independently productive and takes ownership of their work. * Has strong backend engineering fundamentals. * Can investigate and solve complex production issues. * Understands performance, scalability, and reliability. * Communicates clearly with both technical and non-technical stakeholders. * Knows when to investigate independently and when to ask for help. * Gives and receives feedback well. * Can mentor and support less experienced engineers. * Uses AI coding tools effectively without compromising code quality.
Project Environment * Modern C# / .NET * ASP.NET Core * SQL and relational databases * Entity Framework Core / Dapper * Microservices and distributed systems * Kubernetes and containers * CI/CD * Production monitoring and observability * React / micro frontends * Azure or AWS * AI-assisted development tools
Interview Process * Round 1: Technical interview * Round 2: Final interview with the client/team
Why Join? * Work on complex production .NET systems. * Join an experienced international engineering team. * Work with modern backend, cloud, and distributed system technologies. * Take ownership of meaningful engineering challenges. * Use modern AI-assisted development tools as part of the engineering workflow. * Long-term contract opportunity.
