Senior Software Engineer C# .NET in Middlesbrough

Middlesbrough Full-Time No working from home possible

Apply Now

Senior Software Engineer (.Net) - York/Hybrid

A well-established software business is modernising a large Windows desktop platform into a modern web product, and theyre looking for a Senior .NET Developer to play a key role in that transformation.

This is a hands-on role with real influence over back-end architecture, technical direction and delivery.

Youll work across C#/.NET, APIs, system design and legacy modernisation, while helping the wider team adopt better engineering practices and make effective use of AI-assisted development.

What your typical day will look like:

Building complex back-end services and APIs using C#, .NET and ASP.NET Core
Making pragmatic architectural and technical decisions
Modernising functionality from a large WinForms/legacy platform
Working closely with Engineering, Product and technical stakeholders
Using AI coding tools and agents across development, testing, refactoring and migration
Supporting high standards around testing, security, observability and code quality
Investigating complex technical issues and driving them through to resolution
Providing technical guidance and helping other engineers develop

About you:

Strong commercial experience with C#, modern .NET and ASP.NET Core

Strong understanding of system architecture, APIs, data and integrations

Experience working with SQL and relational databases

A solid understanding of software design, testing and maintainable code

Experience working with large or unfamiliar codebases

Experience modernising or migrating legacy systems

An interest in, or practical experience of, AI-assisted development

The confidence to make technical decisions, communicate them clearly and influence others

Bonus points for: Kubernetes, Docker, PostgreSQL, Redis, Elasticsearch, GraphQL, observability tooling, CI/CD, microservices or RabbitMQ.

Working pattern

York/Hybrid 2 days per week in the office

37.5 hours per week with flexitime and core hours of 10am3pm.

This is a great opportunity for a senior engineer who wants more than just another development role. Youll have genuine influence over architecture, engineering practices, tooling and the future direction of the platform, while remaining hands-on with the code. If this sounds like something for you, please apply now!
Senior Software Engineer (.Net) - York/Hybrid

JBRP1_UKTJ