Senior .NET Backend Developer Location: York (Hybrid - 2 days per week)
Salary: Competitive + Benefits
We're partnering with an established technology business undergoing a significant platform modernisation programme and are looking to appoint a Senior .NET Backend Developer to play a key role in shaping the future of its engineering capability.
This is a hands-on senior engineering position, working closely with product and engineering teams, you'll help drive technical direction, champion best practice and contribute to the evolution of a high-performing development function.
The Role - Design, develop and maintain backend services and APIs using C# and modern .NET / ASP.NET Core.
- Contribute to architectural decisions across backend services, integrations and data.
- Modernise legacy applications into scalable, maintainable web-based solutions.
- Collaborate with cross-functional teams to deliver robust technical solutions.
- Promote engineering best practices, including automated testing, code quality and security.
- Investigate and resolve complex production issues.
- Support technical leadership through mentoring, knowledge sharing and architectural guidance.
Required Experience - Commercial experience with C#, .NET and ASP.NET Core.
- Strong background developing scalable APIs and backend services.
- Experience designing software architecture and distributed systems.
- Solid SQL and relational database knowledge.
- Strong understanding of software design principles, dependency injection and automated testing.
- Experience working on complex or legacy software modernisation projects.
- Excellent communication skills with the ability to influence technical decisions.
Desirable Skills - Docker and Kubernetes.
- PostgreSQL, Redis or Elasticsearch.
- GraphQL.
- RabbitMQ or other messaging technologies.
- CI/CD pipelines and modern DevOps practices.
- Observability tooling such as Grafana, OpenTelemetry or Prometheus.
- Experience using AI-assisted development tools within the software development lifecycle.
What's on Offer - Hybrid working (2 days per week in York).
- Flexible working hours.
- Opportunity to influence architecture and technical strategy.
- Modern technology environment with investment in engineering tooling.
- Excellent benefits package.
Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy.
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