Backend Developer

We are looking for a Backend Developer to take ownership of the backend architecture, APIs, and core services that power both our existing web platforms and a new, modern, real-time operational system.

This is a hands-on role focused on developing scalable backend solutions, maintaining and enhancing our existing ASP.NET applications, and building cloud-based services using ASP.NET Core and Microsoft Azure. You will work closely with our developers to deliver modern, API-driven applications while helping to modernise our technology stack and improve the performance, security, and reliability of our systems.

You can find out more about us here: https://nationalgas.org.uk/

WHAT YOU’LL DO

• Maintain, enhance, and support existing ASP.NET-based websites hosted on IIS
• Build and extend backend services and REST APIs using ASP.NET Core / .NET
• Implement real-time features using SignalR.
• Support and integrate WebRTC audio-only calling functionality.
• Design, optimise, and maintain SQL Server and MariaDB databases.
• Build features involving mapping, GPS, geolocation, and geofencing.
• Collaborate with product, engineering, and DevOps teams on system architecture.
• Write clean, testable, and maintainable code across the full stack.
• Contribute to performance, scalability, and security improvements.
• Participate in code reviews, technical planning, and system design discussions

REQUIRED SKILLS AND EXPERTISE

• Strong experience with ASP.NET Core / .NET
• Experience maintaining or building ASP.NET websites
• Strong background building RESTful APIs
• Solid knowledge of SQL Server or MariaDB
• Experience with Entity Framework Core and/or Dapper
• Understanding of async programming, concurrency, and performance
• Experience implementing authentication and authorisation (JWT, OAuth2)

DevOps & Cloud

• Experience with CI/CD pipelines (Azure DevOps, GitHub Actions)
• Comfortable using Docker for development and deployment
• Exposure to Microsoft Azure (App Services, SignalR Service, Storage)
• Familiarity with logging and monitoring tools (Application Insights, Serilog)
• Comfortable working with IIS and Windows-based hosting environments

WHAT WE OFFER

• Ownership of both existing platforms and new system builds
• Opportunity to modernise and shape our long-term tech stack
• Engineering-led environment with real technical ownership
• Clear career progression and skills development

Pay: £40,000.00 per year

Benefits:

• Company pension

Work Location: In person