Role - Python Focused Senior Software Engineer

Location - London

0 to 1 Senior Software Engineer (Small Team real impact)

Stack - Python, Go, AWS

Joining a small team who are building a 0 to 1 product, so this is properly early, shaping the architecture, product direction and core technical decisions from day one.

What makes it a bit different:

• You’re not joining a big existing team — this is closer to a founding engineer environment, but with the backing, data access and distribution of a large, established business
• The product is data-first (not feature-first), multiple data sources, messy real‑world financial data and a focus on building something genuinely useful for decision‑making rather than dashboards for the sake of it
• They’re intentionally keeping things greenfield and modern (AI‑assisted workflows, no legacy constraints)

We are looking for someone comfortable operating in ambiguity, making e...