Principal Engineer at Omnis Partners, United Kingdom, £Contract Rate

🚀 Principal Engineer - AI-Assisted Engineering / Developer Productivity🚀

📍 Remote (UK)

📅 ASAP Start

💰 Outside IR35

⏳ Initial 3 months (likely extension)

We’re supporting a consultancy delivering a major engineering transformation programme across a complex SaaS and Microsoft CRM platform estate.

They’re looking for a Principal-level Engineer who can combine strong modern .NET engineering experience with AI-assisted development practices to materially improve engineering velocity, developer productivity and software delivery.

This is a highly hands-on role focused on modern engineering workflows, AI harnesses/tooling, and improving how teams build, test, review, and deploy software at scale.

🔑 What you’ll be doing

• Driving AI-assisted engineering practices across delivery teams

• Building and improving AI harnesses, agentic workflows, and developer tooling around LLMs

• Improving engineering velocity, SDLC maturity, and developer experience

• Working across a distributed microservices/platform ecosystem

• Introducing automation into testing, code review, documentation, and delivery workflows

• Helping shape architectural decisions and engineering standards

• Coaching teams on modern software engineering and AI-native development practices

🎯 What they’re looking for

• Strong experience as a Principal, Staff, or Lead Engineer

• Deep hands-on .NET / C# experience

• Strong cloud experience across AWS or GCP

• Experience with microservices, distributed systems, and event-driven architectures

• Exposure to AI-assisted development tooling such as Claude Code, GitHub Copilot, Cursor etc

• Experience building AI tooling, harnesses, MCP tooling, RAG systems, or agentic workflows

• Strong CI/CD, DevOps, and engineering automation experience

• Comfortable working closely with engineering leadership and product stakeholders