Senior AI Engineer

• Join 9fin as a Senior AI Engineer, working hybrid from London with two office days a week from January 2027. • Build large-scale AI-powered systems within a growing Data Science team that uses machine learning, NLP, computer vision and knowledge mining. • Design generative AI applications for complex financial and legal workflows in the global debt markets. • Work in an internal startup-style environment that is dynamic and fast-paced. • Help lead the adoption of AI across teams and products throughout 9fin. • Learn and apply the latest research techniques alongside talented researchers and engineers.

• Bring strong Python skills for production-ready delivery. • Show deep expertise in at least one area, such as information retrieval, entity extraction, knowledge graphs, recommendation systems, tabular ML or statistical modelling, with familiarity in others. • Know the GenAI landscape and agentic frameworks well. • Have experience across the full model lifecycle, including experimentation, training, testing, monitoring and deployment. • Use a data-centric approach and value strong evaluation practices. • Show a strong product focus and a desire to understand the end-to-end impact of your solutions on users. • Know AWS's AI infrastructure well.

• Know chunking strategies, embedding model fine-tuning and re-ranker training for information retrieval. • Have experience building knowledge graphs and using graphRAG. • Show familiarity with recommendation systems, learning-to-rank and user modelling. • Have experience with tabular ML such as GBDTs and anomaly detection.

• Design and build generative AI applications for complex financial and legal workflows. • Drive the end-to-end model development lifecycle and lead the team in best practices. • Ensure research is reproducible and models are delivered and deployed in a well-managed way. • Collaborate cross-functionally to understand business problems and share ideas. • Mentor and elevate your teammates. • Translate complex problems into well-scoped bets and iterate quickly with a fail-fast mentality. • Apply ground-breaking research and approaches in advanced topics. • Share compelling ideas and work with the wider organisation to push AI adoption across 9fin.

• Earn a competitive salary benchmarked at the top end of the market, plus equity. • Work in a hybrid model, with office days on Tuesdays and Wednesdays from January 2027. • Work abroad for up to 3 months a year. • Take 25 holiday days per year, with the option to exchange local public holidays for alternative days. • Save for retirement with a pension where 9fin matches contributions of up to 7%. • Receive private medical insurance, group life assurance, and paid sick leave with income protection. • Benefit from enhanced parental leave and flexible working arrangements. • Grow with a professional learning budget, an £800 AI experimentation budget and a one-month paid sabbatical after 5 years.

9fin is an AI platform for global debt markets, replacing fragmented data, PDFs and manual workflows with a single platform for credit data, analysis and workflows. It powers teams at 300+ institutions worldwide, including global banks, asset managers, private equity firms and law firms. The business is scaling quickly, with rapid expansion in the US.