Principal Software Engineer

Description:

Due to continued growth and investment in engineering capability, we’re supporting a well-established UK SaaS provider as they appoint a Principal Back-End Developer. This organisation delivers a core platform used at scale and is committed to evolving its technology landscape to support long-term growth and performance.

About the Role

This is a senior, hands-on position combining deep technical expertise with leadership and mentorship. You will take ownership of back-end architecture and technical strategy, ensuring the platform remains scalable, resilient and aligned to wider business objectives.

Responsibilities

• Influence back-end architecture and platform strategy
• Define engineering standards, improve development practices and enhance tooling and observability
• Mentor and support other engineers, helping to raise the overall technical capability of the team

Required Skills

• Strong commercial experience with C# and .NET (6+)
• Expert knowledge of SQL Server
• Proven experience with Test-Driven Development (NUnit)
• Experience building and maintaining RESTful and GraphQL APIs
• Solid understanding of SOLID principles, OOP and modern back-end design
• Confidence diagnosing and resolving complex production issues
• Excellent communication skills with the ability to influence technical direction

Preferred Skills

• Entity Framework or similar ORMs
• Azure and modern DevOps / CI/CD practices
• Observability tools (logging, metrics, monitoring)
• Strong awareness of security best practice