Principal Back-End Developer - Manchester City Centre

Principal Back-End Developer Up to £70,000 | Manchester

We're working with a well-established UK SaaS provider that is investing heavily in its engineering capability and looking to appoint a Principal Back-End Developer to set technical direction and lead the evolution of a core platform used at scale.

This is a senior, hands-on role where you'll combine deep technical expertise with leadership and mentorship, shaping back-end architecture while working closely with other senior engineers and stakeholders across the business.

You'll play a key role in defining standards, improving engineering practices, and ensuring the platform remains scalable, resilient, and aligned with wider business goals.

What you'll be doing:

• Owning and defining back-end architecture and technical strategy

• Building and evolving high-performance SaaS services used by thousands of users

• Acting as a technical leader and mentor, supporting the growth of other engineers

• Driving best practice across TDD, code quality, and system design

• Improving development processes, tooling, and observability

What you'll bring:

• Strong commercial experience with C# and .NET (6+ preferred)

• Expert knowledge of SQL Server and Test-Driven Development (NUnit)

• Proven experience building and maintaining RESTful and GraphQL APIs

• Strong understanding of SOLID principles, OOP, and modern back-end design

• Confidence diagnosing and resolving complex production issues

• Excellent communication skills and the ability to influence technical direction

Desirable experience:

• Entity Framework or other ORMs

• Azure and modern DevOps / CI/CD practices

• Experience with observability (logging, metrics, monitoring)

• Strong awareness of security best practice

What's on offer:

• Salary up to £70,000

• Manchester-based role with an office-first culture and flexible working hours

• Clear progression at Principal level with real influence over technical direction

• Collaborative, engineering-led environment with a strong focus on quality

• Comprehensive benefits package including bonus schemes, training budget, and wellbeing support

To be considered, please apply via this advert or email me directly at .For further information, feel free to call me on or .

By applying for this role, you give express consent for us to process and submit (subject to required skills) your application to our client in conjunction with this vacancy only.