Staff Software Engineer

Senior to Principal Software Engineer | Mission-led Fintech - Hybrid London Here's the thing. If you're a Senior, Staff, or Principal Software Engineer who wants serious impact without the ego-fest, this will probably speak to you. I'm partnering with a fast-growing fintech that helps millions manage how they earn, save, and spend from one simple app. Backed by top VC and impact investors. Real users. Real outcomes. I've seen a lot of roles, and this one stands out because the mission isn't a veneer. It runs through product, data, and engineering decisions day to day. Why this is worth your time Work that matters. You'll ship features that improve financial wellbeing for people who actually need it. Scale that tests your thinking. Millions of active users, real traffic spikes, and data you can do something with. Proper ownership. Fast cycles, low ceremony, and room to shape architecture while mentoring others. What you'll work with as a Staff Software Engineer Stack: Python

TypeScript, React, Svelte, PostgreSQL, Snowflake, AWS. Setup: Cross-functional squads that care about outcomes, not ticket-ticking. You'll improve scalability, evolve architecture, and still ship. I like that balance. Less pontificating, more building. What you'll do Design and build reliable, scalable systems that hold up under load. Lead on architecture decisions. Pick the right pattern for the problem. Mentor engineers. Model high-quality code and thoughtful reviews. Ship usable product. Measure impact. Iterate quickly. What you'll bring Senior to Staff-level experience building distributed systems at scale. Strong technical depth across backend and either frontend or data. Pragmatic problem solving. You know when to go simple and when to go deep. A genuine interest in tech that helps people. I think that matters here. Package and ways of working Strong base salary plus equity Hybrid, 3 days per week in the London office 25 days annual leave, enhanced parental benefits, private healthcare Sabbatical and volunteering leave Tax-efficient pension and flexible benefits schemes If you've been looking for a Principal or Senior Software Engineer role in London where you can build for scale and feel good about the outcome, let's talk. Drop me a message here or email your CV. Even if you're just curious, I'm happy to share the full brief and talk through fit. Senior Software Engineer London, Staff Software Engineer, Principal Engineer, Fintech jobs London, Python, TypeScript, React, Svelte, PostgreSQL, Snowflake, AWS, scalable systems, distributed systems, hybrid jobs London #hiring #softwareengineering #seniorsoftwareengineer #principalengineer #staffengineer #fintech #londonjobs #python #react #typescript #aws #postgresql #snowflake #careers