Updated SSE 17/06/2026

9fin is the AI platform powering global debt markets — the world’s largest asset class at over $145 trillion.

Debt markets are vast, global, and mission-critical, yet still run on fragmented data, PDFs, and manual workflows. 9fin replaces this broken infrastructure with a single platform that centralises proprietary credit data, deep analysis, and high-value workflows across global markets.

Today, 9fin powers teams at 300+ blue-chip institutions worldwide, including global banks, asset managers, private equity firms, law firms, and advisors. The business is scaling at exceptional speed, with rapid expansion in the US and best-in-class retention driven by deep workflow adoption.

We’re at a defining inflection point. With proven product-market fit and strong, global market pull, 9fin is accelerating toward becoming the category-defining platform for debt markets worldwide.

• Experience with Python and modern web frameworks (we use FastAPI with strong typing and Pydantic — but we'd rather hire the right search engineer and have them pick up the language than compromise on search depth).

• Familiarity with distributed systems concepts — consistency, partitioning, replication — and how they apply to search infrastructure under load.

• Experience with cloud-managed search deployments (we run on Elastic Cloud / AWS).

• Exposure to how search and retrieval intersect with AI/ML systems — vector search, hybrid retrieval, or RAG pipelines.

Python (Flask & FastAPI), PostgreSQL, AWS (Lambda, ECS, Docker), Elastic Cloud. We have our own internal developer platform with standardised paved-road approaches to infrastructure, managed preview environments, and feature flags — so you can ship with confidence and iterate quickly.

• 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

• Professional learning and development budget

• Quarterly team socials

• Summer and Winter company social events

At 9fin we are dedicated to building and promoting a fair and inclusive workplace where everyone can reach their full potential and truly belong. We recognize that building diverse teams enables a more creative and productive environment. If you’re excited about this role but your experience doesn’t perfectly align with the job description, we encourage you to apply anyway. You might just be who we’re looking for — either for this role, or perhaps another.