We build software products for clients across embedded, IoT, SaaS, AI/ML, e-commerce, mobile, and web. Were looking for a Senior .NET Backend Engineer to join a strong, high-bar team building high-performance, secure .NET services. Youll be a hands-on contributor - designing and writing production backend code, shaping technical decisions alongside your teammates, and delivering for clients (including large enterprise and banking environments).
What youll do:
Design and build robust, high-performance, secure backend services in C# / .NET.
Contribute to backend architecture and technical decisions alongside the team.
Design and document APIs (Swagger / OpenAPI) for clean, well-versioned integrations.
Take part in code reviews and help uphold the teams engineering standards.
Drive performance, reliability, and secure-by-design practices in your code.
Contribute to build, packaging, and deployment so releases are repeatable and reliable.
Requirements: Must-have qualifications:
5+ years in backend engineering.
1+ years experience in AI Tools Claude Code, Copilot, Cursor
Expert-level command of the core .NET stack: C#, .NET / .NET Core, ASP.NET Core, Entity Framework, LINQ, and async/concurrent programming.
Strong networking fundamentals (TCP/IP, HTTP/S, sockets) and API/service communication.
Proven performance-engineering skills: profiling, optimization, and advanced debugging of complex systems.
Strong background in secure code writing (OWASP, secure SDLC, common vulnerability classes and mitigations).
Experience with API design and documentation using Swagger / OpenAPI (e.g. Swashbuckle).
Software packaging and deployment experience (NuGet, containers/Docker, CI-driven artifacts, installers).
Fluent with modern dev tooling: Git, JIRA, Jenkins.
Professional-level English.
Excellent interpersonal and communication skills.
Nice to have:
Cloud experience (Azure / AWS) and microservices or messaging (e.g. gRPC, RabbitMQ, Kafka).
Experience with AI-first development (Claude Code, Cursor).
Additional programming languages and frameworks.
Experience working in large organizations (e.g. banking / financial services).
This position is open to all candidates.