> Markdown version of [/jobs/ext/13329-principal-software-engineer](https://www.wearedevelopers.com/jobs/ext/13329-principal-software-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Software Engineer - **Company:** MHR International UK Ltd - **Location:** Ruddington, UK - **Salary:** £80,000.0 - **Contract:** Permanent contract - **Skills:** Clean Code Principles, .NET Framework, Agile Methodology, Artificial Intelligence, Microsoft Azure, Software as a Service, Cloud Computing, Cloud Engineering, DevOps, Distributed Systems, Microsoft Software, Test-Driven Development (TDD) - **Published:** May 16, 2026 - **Apply:** https://uk.indeed.com/viewjob?jk=8c066c82757f4250 ## About the Role Do you have experience in Test-driven development?, * Strong experience with Microsoft technologies (.NET, Azure) and modern engineering practices * Expertise in scalable architecture and cloud-native systems * Proven ability to deliver technical strategy and complex initiatives * Advocate of TDD, continuous improvement, and AI-assisted engineering * Strong collaboration and stakeholder communication skills * Experience mentoring engineers and raising technical standards ## Description Join MHR as a Principal Software Engineer, leading complex engineering challenges that shape our products and technical direction. In this role, you will operate across the organisation-defining strategy, influencing architecture, and guiding delivery within a modern SaaS environment. Drawing on experience with Microsoft technologies such as .NET and Azure, you'll apply modern programming practices including cloud-native design, distributed systems, and test-driven development. You will also champion AI-assisted development to improve engineering efficiency, quality, and innovation. This is a high-impact position combining hands-on expertise with technical leadership and mentoring. Your Team You'll work across cross-functional Agile teams, partnering closely with engineers, architects, and stakeholders. Through influence rather than authority, you'll help align teams and foster a collaborative, inclusive culture focused on continuous improvement. Your Impact This role will see you defining and executing technical strategy, shaping scalable, resilient architecture aligned with business goals. You'll drive engineering excellence through best practice-embedding test-driven development and using AI-assisted tooling to enhance delivery. Working across teams, you'll help align priorities, mitigate risks, and ensure consistent, high-quality outcomes, while mentoring engineers to strengthen capability. As a trusted technical leader, you'll balance long-term vision with delivery outcomes. ## Related Videos - [From DevOps to Scaled DevOps: How We’re Rebuilding Continuous Delivery as a Platform](https://www.wearedevelopers.com/videos/100018-from-devops-to-scaled-devops-how-we-re-rebuilding-continuous-delivery-as-a-platform) - [This Is Not Your Father's .NET](https://www.wearedevelopers.com/videos/967-this-is-not-your-father-s-net) - [Developer Tools for Microsoft Azure](https://www.wearedevelopers.com/videos/450-developer-tools-for-microsoft-azure) - [Why you must use TDD now!](https://www.wearedevelopers.com/videos/114-why-you-must-use-tdd-now) - [DevOps Maturity Check – a way to balance autonomy and alignment](https://www.wearedevelopers.com/videos/58-devops-maturity-check-a-way-to-balance-autonomy-and-alignment) - [Practical tips for keeping your C# code base clean](https://www.wearedevelopers.com/videos/100149-practical-tips-for-keeping-your-c-code-base-clean) ## Related Articles - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [Data Engineer Salary UK](https://www.wearedevelopers.com/magazine/253-data-engineer-salary-uk) - [What is Software Engineering in the Age of AI?](https://www.wearedevelopers.com/magazine/640-what-is-software-engineering-in-the-age-of-ai)