Wave Group
Staff Software Engineer
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Debt is the world's largest asset class, over $145 trillion, and it still runs on PDFs, phone calls, and spreadsheets. I'm working exclusively with a fast scaling fintech platform that's changing that, serving blue chip institutions across banking, asset management, and law.
I'm growing their backend engineering team, and I'm hiring at two levels:
- Senior Software Engineer (£90k to £110k)
- Staff Senior Engineer (£120k to £140k)
Both roles work across the same backend stack: Python, FastAPI/Flask, PostgreSQL, AWS (Lambda, ECS, Docker), with strong typing and Pydantic throughout.
What you'll actually be doing:
- Building the systems behind complex financial data modelling, access control, ML/AI driven services, and automation
- Collaborating closely with in-house financial, legal, and editorial domain experts to turn scattered credit data into something usable
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For the Staff Senior Engineer II level specifically, you'll be leading on distributed systems problems: scaling decisions, event-driven architecture, migrations under real production load, and mentoring across the team.
What they're looking for:
- Computer Science, Maths, or Physics degree
- 5+ years experience, with at least 2 years at Senior level or above
- Strong Python and API/SOA experience
- Solid SQL and relational data modelling
- For Senior Engineer II: a real track record with distributed systems and scaling, you should be able to talk through an example end to end
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Logistics:
- Hybrid, 1 to 2 days onsite at their Central London office
- Interview process: live coding (60 min), then skills interview with two senior engineers (60 min), then 30 min with VP of Engineering.
This company offers top of market salary bands, equity, private medical, enhanced parental leave, a month's paid sabbatical after 5 years, and the ability to work abroad up to 3 months a year.
If you're a backend engineer who wants to work on genuinely hard problems in a market that's still stuck in the 80s, I would like to hear from you.
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