Senior AI Engineer - Legal AI
LondonFull-timePosted 4mo ago
About the role
Senior AI Engineer focused on converting complex legal and financial documents into structured data, applying generative AI and advanced NLP to support financial and legal workflows at 9fin.
Responsibilities
- Design and build generative AI applications tailored to complex financial and legal workflows, leveraging state-of-the-art models to deliver innovative, practical solutions that streamline decision-making and unlock new efficiencies.
- Drive end to end model development lifecycle, leading the team in best practices, ensuring reproducible research and well managed model delivery/deployment.
- Collaborate cross functionally to share diverse ideas, understand business problems, and elevate/mentor your teammates.
- Translate complex problems into well-defined scoped bets in an internal startup style environment, dynamic and fast-paced.
- Learn and apply ground-breaking research and approaches in advanced topics, iterating improvements with a fail fast mentality.
- Be a proactive sharer of compelling ideas/work to the rest of the team and organisation. Help lead/push the adoption of AI throughout 9fin.
Qualifications
- Legal Document Intelligence: Deep experience with complex legal and financial documents (e.g., bond offering memoranda, credit agreements, indentures, court filings, and related transaction documentation).
- Information Extraction: Expertise in extracting structured data from long, complex documents (financial terms, covenant provisions, definitions, parties, dates, thresholds, baskets, ratios, transaction mechanics).
- Document Understanding & NLP: Understanding of document structure, section hierarchy, cross-references, defined terms, tables, exhibits, and patterns common in legal/financial docs.
- LLMs for Structured Extraction: Experience applying LLMs to high-precision extraction tasks, including schema-driven extraction, citation grounding, validation, and confidence scoring.
- Data Quality & Validation Systems: Ability to design review, verification, and reconciliation workflows to ensure extracted data accuracy and audibility.
- Training Data & Annotation: Experience building labelled datasets, annotation frameworks, synthetic data generation, evaluation sets for document extraction tasks.
- Retrieval & Context Engineering: Strong understanding of chunking, document segmentation, retrieval, and context construction for long-document reasoning and extraction workflows.
- Financial & Legal Domain Knowledge: Familiarity with leveraged finance, debt capital markets, credit agreements, covenant packages, bond documentation, restructuring processes.
- Production ML Engineering: Ability to build and operate extraction pipelines, evaluation systems, model-serving infrastructure, and monitoring for production AI workflows.
- Python: Strong proficiency for production-ready delivery.
- Full model lifecycle experience: Experimental design, training, testing, monitoring, and deployment.
Skills
Required:Generative AINatural Language ProcessingStructured Data ExtractionRetrieval & Context EngineeringProduction ML EngineeringPython
Benefits
- Competitive Salary
- Equity
- Pension (min 4% employee, 7% company match)
- Private Medical Insurance
- Paid sick leave with Income Protection
- Group Life Assurance
- Season Ticket Loan & Cycle to Work schemes
- 25 holiday days per year
- Local public holidays with exchange option
- Work abroad for up to 3 months a year
- 1 month paid sabbatical after 5 years
- Enhanced parental leave & flexible working arrangements
- Professional learning and development budget
- AI experimentation budget of £800 per employee (UK)
- Quarterly team socials
- Summer and Winter company social events
- Hybrid policy with planned office days on Tue/Wed from Jan 2027
Last updated Oct 21, 2026. Interested? Apply on the company site.
About 9fin
Faster, smarter, debt market intelligence
9fin is a leading provider of debt market intelligence and offers everything you need to analyse a credit, or win a mandate in one AI-powered platform
Debt Market IntelligenceDataAnalyticsCredit AnalysisFinancial Data
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