9fin - Staff Engineer - Core Markets
Requirements
• Experience designing and building large-scale backend systems and distributed architectures. • Strong systems design skills and experience leading cross-team technical initiatives. • Experience with cloud infrastructure (AWS), Kubernetes, APIs, and modern backend development. • Familiarity with AI-powered systems, Retrieval-Augmented Generation (RAG), search platforms, or vector databases. • Strong programming experience in Python or another modern backend language. • Comfortable influencing technical direction without direct authority. • Excellent communication skills and a passion for mentoring engineers and raising engineering standards. • Experience as a founding engineer or CTO at a startup, or building systems from scratch in early-stage environments • Experience modernising legacy systems.
Responsibilities
• Define technical strategy and architecture across Platform, AI, Retrieval, and shared engineering services. • Partner with Engineering Leaders and Staff Engineers to drive technical direction and platform investments. • Design scalable backend systems, APIs, and shared platform capabilities. • Guide architecture across teams, helping reduce complexity and establish common patterns. • Partner with AI and Retrieval teams to build scalable search and RAG capabilities. • Lead complex cross-team technical initiatives from design through production. • Improve platform reliability, scalability, observability, and developer experience. • Contribute hands-on to critical technical work and set a high engineering bar through design reviews, mentoring, and technical leadership. • Leverage AI-assisted engineering to improve productivity and accelerate delivery.
Benefits
• We’re a scaling start up and we enjoy sharing our success, when the company succeeds, we always reinvest that in our people. We also offer huge amounts of responsibility, an abundance of opportunity for growth and a platform to truly excel. • Financial & Insurance • Competitive Salary (our salary bands are benchmarked at the top end of the market) • Equity options • Pension (your minimum contributions are 4% with 9fin matching up to 7%) • Private Medical Insurance • Paid sick leave with Income Protection for long periods of illness • Group Life Assurance • Season Ticket Loan & Cycle to Work schemes • 25 holiday days per year • Local public holidays (with the ability to exchange them for alternative days) • Hybrid working model, to allow you the flexibility to decide how, where and when you do your best work • Work abroad for up to 3 months a year • 1 month paid sabbatical after 5 years of service • Enhanced parental leave & flexible working arrangements available • Training & Culture • Professional learning and development budget • Quarterly team socials • Summer and Winter company social events • 9fin is an equal opportunities employer
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