Senior AI Engineer - Legal AI

• Join 9fin as a Senior AI Engineer in Legal AI, working hybrid from London two days a week. • Build AI systems that convert complex financial and legal documents into structured, reliable data. • Power financial analysis and workflow automation for global debt markets, the world's largest asset class. • Work in an internal startup-style environment within a fast-growing Data Science team using machine learning and NLP. • Help lead the adoption of AI across 9fin's teams and products. • Learn and apply the latest AI research alongside talented researchers and engineers.

• Bring deep experience working with complex legal and financial documents such as credit agreements, indentures and bond offering memoranda. • Show expertise in extracting structured data from long documents, including covenant provisions, definitions, parties, dates and ratios. • Use LLMs for high-precision extraction, including schema-driven extraction, citation grounding, validation and confidence scoring. • Know document understanding and NLP, including section hierarchy, cross-references, defined terms and tables. • Build and operate production ML pipelines covering experimentation, training, testing, monitoring and deployment. • Write production-ready Python. • Show a strong product focus and a drive to understand the impact of your work on end users. • Know AWS's AI infrastructure well.

• Know leveraged finance, debt capital markets, covenant packages and restructuring processes. • Build labelled datasets, annotation frameworks, synthetic data and evaluation sets for document extraction. • Understand chunking, document segmentation and retrieval for long-document reasoning. • Design review, verification and reconciliation workflows that keep extracted data accurate and auditable. • Apply experience with chatbots and general-purpose retrieval-based AI applications.

• 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 reproducible research and well-managed model delivery and deployment. • Collaborate cross-functionally to understand business problems and share ideas. • Mentor and elevate your teammates. • Translate complex problems into well-scoped bets in a fast-paced environment. • Apply cutting-edge research and iterate quickly with a fail-fast mentality. • Share compelling ideas and work to push the adoption of AI throughout 9fin.

• Enjoy a competitive salary benchmarked at the top end of the market, plus equity. • Work hybrid from the London office on Tuesdays and Wednesdays from January 2027, with flexibility on the other days. • Take 25 holiday days a year, local public holidays and the option to work abroad for up to 3 months a year. • Receive a pension with 9fin matching your contributions up to 7%. • Benefit from private medical insurance, group life assurance, and paid sick leave with income protection. • Take advantage of enhanced parental leave and flexible working arrangements. • Get a one-month paid sabbatical after 5 years of service. • Use a professional development budget, an £800 AI experimentation budget, and season ticket loan and Cycle to Work schemes.

9fin is the AI platform powering global debt markets, centralising proprietary credit data, deep analysis and high-value workflows in one place. It serves 300+ blue-chip institutions worldwide, including global banks, asset managers, private equity firms and law firms. The company is scaling quickly with strong product-market fit and rapid expansion in the US.