Principal Software Engineer

Job description

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