Senior Software Engineer

We're partnering with a fast-scaling fintech that's building the intelligence layer for debt markets. Think financial analysis, credit data, legal and ESG insights, all delivered at speed to some of the biggest names in banking, asset management and law.

They need a Senior Software Engineer to join a cross-functional product team and help shape the backbone of their platform.

What you'll be doing

Backend-heavy engineering across a Python/FastAPI stack, working on everything from data pipelines and API design to ML/AI service integration. You'll be a proper senior IC, running code reviews, mentoring engineers, and getting involved early in research and experimentation, not just building to spec.

The stack

• Python (FastAPI, Flask, strong typing, Pydantic)
• PostgreSQL
• AWS (Lambda serverless + ECS/Docker)
• Internal dev platform with standardised CI/CD pipelines
• Feature flags and automated preview environments

What you'll need

• Strong Python and web framework experience (FastAPI preferred)
• Solid API design and service-oriented architecture background
• Hands-on with data flow design, from persistent storage to API endpoints
• Good SQL knowledge
• Experience writing testable, maintainable code and conducting code reviews
• Ability to communicate technical decisions clearly to non-technical stakeholders

What's in it for you

• Top-of-market salary, equity
• 7% pension match, private medical
• 25 days holiday, hybrid working, and the ability to work abroad up to 3 months a year.
• High ownership, real influence, and a codebase worth caring about.

2 days onsite (Central London)

Salary - Up to £120 + equity

If this sounds like you, please apply for more details.