Building scalable authentication and authorisation at 9fin

Information Retrieval for agents in finance: Why the top open reranker model made our system worse

How 9fin evaluated open rerankers for agentic RAG in debt markets — and why the top public benchmark model reduced retrieval precision.

9hack: Inside 9fin's second hackathon of 2026

Starting summer on a high, 9finners from across engineering, AI, data science, product and design teams paused their usual work for two days to focus on exchanging ideas and producing practical, valuable solutions to real engineering challenges.

From Postgres RLS to OpenFGA: Lessons from building (and replacing) our authorisation system

How 9fin migrated from PostgreSQL Row Level Security to OpenFGA for scalable relationship-based access control in sensitive financial systems.

Beyond the model: how we’re making AI in debt markets work at scale

Data excellence at 9fin

Watch the recording — Hannes Kindbom's talk at the Data Science Festival