Principal Software Engineer

Our client is a UK-based B2B software company specialising in technology for the energy and commodity markets.

They are looking for a hands-on Principal Software Engineer to join a small engineering team building complex software for the European energy and trading market.

This is a technical leadership role first, with people management alongside it. You’ll continue writing and reviewing production code every week while also leading and developing a small team of engineers.
Requirements

You’ll take ownership of the technical direction of a core product area, working from well-defined requirements through design, development and delivery.
Key responsibilities include:
- Write, review and ship production code regularly using C#/.NET and Azure
- Lead technical design and make architecture decisions, balancing delivery speed with long-term maintainability
- Design, develop, refactor, debug, test and support high-quality software
- Line-manage and mentor a small team of engineers
- Lead code and design reviews and constructively challenge technical decisions
- Own automated unit testing and promote strong engineering practices
- Identify root causes of complex technical issues and implement long-term solutions
- Contribute to planning, estimation and requirements refinement

What We’re Looking For
- 10+ years of commercial software engineering experience
- Strong, recent and hands-on C#/.NET experience, including .NET Core/Web API
- Experience with Azure and cloud-based software development
- Strong system design and software architecture skills
- Experience with SQL and NoSQL databases
- Docker, containerisation and orchestration experience
- Strong understanding of SOLID principles, design patterns and integration patterns
- Experience with automated testing and code reviews
- Proven people management / line management experience while remaining hands-on technically
- Fluent English and strong communication skills
- A stable career history and experience working in complex products

Nice to Have
- Experience in fintech, payments, trading, energy or another complex/regulated domain
- Experience in a smaller product-focused company
- Infrastructure as Code, such as Terraform, Bicep or ARM
- GitHub Actions, SonarCloud or CodeQL
- Experience with multi-tenant SaaS products
- TypeScript, Angular, JavaScript or Python

Benefits

Fully remote within India

Competitive salary + annual bonus

Private medical insurance

Flexible working hours

24 days’ annual leave plus bank holidays

Regular in-person team gatherings with travel and accommodation covered

Opportunity to work on complex software used in live European energy markets