Build & Iterate: Design, develop, and maintain high-quality back-end services, RESTful/GraphQL APIs, and microservices using .NET.
Storage: Work with relational databases (primarily SQL Server) – design schemas, write efficient queries, and optimise performance.
Data Access: Implement data access layers using Entity Framework Core.
Auth: Build and integrate authentication & authorisation mechanisms.
Collaborate: Work within a loose Agile/Sprint framework, contributing to storyboarding and regular sprint planning meetings, and work closely with front-end developers, QA engineers, and product owners to deliver end-to-end features.
Code Quality: Implement clean, maintainable, and automated code testing following Clean Architecture principles and current best practices.
Performance: Identity and resolve performance bottlenecks, security issues, and production incidents.
Documentation: Help maintain technical documentation for APIs and services (Swagger / OpenAPI).

Multiple years of commercial experience in back-end development; at least 5 years with .NET C#.
At least 2-3 years with .NET 6+ / .NET 8+, Entity Framework Core, LINQ, SQL Server, and asynchronous programming.
You are proficient with Entity Framework Core (code-first approach) and have experience managing relational databases (primarily SQL Server) including schema design and query optimisation.
You have a firm grasp of Clean Architecture and Domain-Driven Design (DDD). You advocate for decoupled systems using Dependency Injection and modular monolith or microservices patterns.
You have hands-on experience implementing JWT, OAuth2, and OpenID Connect, specifically using Azure Entra or Duende IdentityServer to build secure, identity-aware applications.
Azure DevOps for task management (Boards) and maintaining CI/CD Pipelines. You understand how to use Docker for containerising services.
You prioritise code reliability by writing unit and integration tests using xUnit, and you utilise FluentValidation to ensure data integrity across your APIs.
You know how to profile applications and implement structured logging using Serilog, integrated with Application Insights for real-time monitoring.

.NET Back-End Developer

Key skills