Principle and Senior Backend Software Engineer (.NET)

Principle and Senior Backend Software Engineer (.NET)

Location: North London/Hertfordshire
Type: Permanent Strong Salary + Bonus + Equity
Right to Work: UK work eligibility required (no sponsorship)

We're searching for a highly skilled Principle and Senior Backend Engineer with fast, accurate coding skills and a passion for building scalable, reliable systems.

You will play a critical role in designing and developing backend services that power IoT products used across high integrity industries including Fire, Security, Telecare, Retail, Water, and National Infrastructure.

You will:

• Build and maintain backend systems using .NET / C#
• Design clean, scalable, maintainable architectures
• Contribute to high automated test coverage across all services
• Translate business requirements into secure, performant backend solutions
• Collaborate closely with front-end, QA, product, and platform teams
• Solve complex technical challenges with elegant, thoughtful solutions

• Backend: .NET / C#
• Automated Testing: NUnit
• Solution Testing: Playwright
• Strong focus on:
  • Reliability and performance
  • Clean, maintainable code
  • High level automated test coverage
  • Scalable, production ready services

We're building a team centred on collaboration, inclusion, and engineering excellence. You'll be joining an environment where people feel supported, challenged, and empowered.

This is an exceptional opportunity to join a growing British IoT leader at a pivotal moment and contribute to the foundation of a brand new engineering organisation.