Senior Software Engineer

Job in City Of London, Central London, Greater London, England, UK

Listing for: Needl

Full Time position
Listed on 2026-05-17

Job specializations:

Software Development
Senior Developer, Software Engineer, Python

Salary/Wage Range or Industry Benchmark: 125000 - 150000 GBP Yearly GBP 125000.00 150000.00 YEAR

Location: City Of London

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 early architectural calls and helping shape something from first principles.

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