Senior Backend .NET Developer

About the role

A full-time, on-site Senior Backend .NET Developer is needed to own the backend of a commercial real estate software platform that helps companies manage property leases, documents, key dates, tasks and lease accounting compliance. The candidate will be the senior .NET expert on the team, working independently and taking accountability for what ships. The role focuses on backend development, with occasional React/TypeScript frontend tasks.

Key responsibilities

• Design, build and maintain backend services in C#/.NET and ASP.NET Core
• Build and maintain the GraphQL API layer consumed by the frontend
• Design database schemas and data access for SQL and NoSQL databases, including Azure SQL and Cosmos DB
• Integrate with Azure services for storage, identity/authentication, functions and search
• Implement authentication, authorisation and security best practices, including OAuth2, JWT and role-based access control
• Own features end to end, from scoping with the architect through implementation, unit testing, code review and deployment via Azure DevOps CI/CD
• Keep the codebase clean and well-structured, following Clean Architecture, DDD and CQRS patterns
• Add logging and monitoring to help diagnose production issues
• Support feature delivery by working on React/TypeScript frontend tasks

Required profile

• Degree in Computer Science, Software Engineering or a related field
• 5+ years of hands-on backend development experience in C#/.NET and ASP.NET Core
• Hands-on experience building GraphQL APIs (the platform uses Hot Chocolate)
• Strong SQL and NoSQL database skills, including schema design and querying
• Experience with an ORM or data access framework such as Entity Framework Core
• Working knowledge of Azure services such as App Service/Container Apps, Azure SQL, Cosmos DB, Blob Storage, Key Vault and Entra ID
• Understanding of CI/CD and experience deploying through a pipeline (Azure DevOps, GitHub Actions or similar)
• Experience with secure API design, unit testing (e.g. NUnit or xUnit) and .NET architecture patterns
• Nice to have: foundational React/TypeScript experience, FluentValidation, AutoMapper and NLog, and observability tools such as Application Insights and OpenTelemetry