Principal Engineer / Software Lead (IC Role) London | Hybrid (3 days onsite), Up to £140K Bonus Benefits We're hiring into one of the most elite engineering teams in financial services — known internally as the Rocket Scientists . Think fintech meets deep tech : solving complex, high-stakes problems across trading, risk, and finance. This is a hands-on IC role (not management), working alongside top-tier engineers and quants. You’ll be building and evolving business-critical systems that power a company redefining financial security at scale. What you bring: MSc/PhD in a STEM subject or standout academic record Strong Python skills and engineering best practices Proven track record in high-pressure environments (e.g. trading, gambling, gaming) Passion for clean, scalable code and solving complex technical challenges Why apply: Work on genuinely hard, high-impact and real world problems Collaborate with an incredibly smart team of engineers and quants Up to £140K base bonus excellent benefits For more information on the role, please send your CV to me on Kamni.Sharma@lafosse.com