Lead Software Engineer Python API – Fintech

Company: Client Server
Apply for the Lead Software Engineer Python API – Fintech
Location: London
Job Description:

Lead Software Engineer / Developer London / WFH to £120k

Are you a skilled backend focused Python technologist with team leadership experience?

You could be progressing your career at a well-funded and profitable FinTech start-up.

As a Lead Software Engineer you’ll head up a small, talented tech team to deliver new features and enhancements as well as some refactoring work, contributing to the core banking platform which integrates with major players such as HSBC. There’s a relatively young codebase and lots of new projects to get stuck into.

You’ll be collaboratively problem solving in a hands‑on role with approximately 50/50 split between architecture / design and people management. You’ll set the standards and mentor more junior developers, fostering a culture of continuous improvement and self development.

Location / WFH

You’ll join colleagues in the Central London office with flexibility to work from home twice a week in a hybrid model.

About you

  • You’re an experienced Software Engineer with Python expertise and a strong knowledge of software engineering best practices and full SDLC experience
  • You have team leadership experience, happy to mentor and develop others as well as provide 1-2-1s and performance reviews
  • You have a good knowledge of cloud based services (they use GCP but AWS or Azure experience is fine)
  • You have experience of building APIs, ideally FastAPI experience
  • You have a good knowledge of CI/CD, testing and deployment
  • You have a thorough understanding of Computer Science fundamentals such as OOP, Data Structures, Design Patterns, Algorithms
  • You’re collaborative and pragmatic with great communication skills
  • You’re degree educated in a STEM discipline, having achieved a 2.1 or above

What’s in it for you

As a Lead Software Engineer you will earn a competitive salary (to £120k) plus pension and other benefits.

Apply now to find out more about this Lead Software Engineer / Developer opportunity.

At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We’re an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

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Posted: June 11th, 2026