9fin

Senior AI Engineer - Legal AI

9fin
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3 months ago
London, United KingdomSenior

Responsibilities

  • Design and build generative AI applications for complex financial and legal workflows.
  • Lead the end-to-end model development lifecycle, including experimentation, training, testing, evaluation, deployment, and monitoring.
  • Build high-precision document extraction systems using schema-driven extraction, citation grounding, validation, and confidence scoring.
  • Develop review, verification, reconciliation, retrieval, context-engineering, and data-quality workflows for long documents.
  • Create labelled datasets, annotation frameworks, synthetic data, and evaluation sets for document extraction.
  • Build and operate production extraction pipelines, evaluation systems, model-serving infrastructure, and monitoring.
  • Collaborate cross-functionally, translate business problems into scoped initiatives, mentor teammates, and promote AI adoption across the organization.

Requirements

  • Deep experience with complex legal and financial documents, including bond offering memoranda, credit agreements, indentures, court filings, and transaction documentation.
  • Expertise extracting structured financial and legal information such as terms, covenants, definitions, parties, dates, thresholds, baskets, ratios, and transaction mechanics.
  • Strong understanding of document structure, section hierarchies, cross-references, defined terms, tables, exhibits, and legal-document patterns.
  • Experience applying LLMs to high-precision structured extraction tasks, including grounding, validation, and confidence scoring.
  • Experience designing data-quality, review, verification, reconciliation, training-data, annotation, synthetic-data, and evaluation systems.
  • Strong understanding of chunking, document segmentation, retrieval, and context construction for long-document reasoning.
  • Familiarity with leveraged finance, debt capital markets, credit agreements, covenant packages, bond documentation, restructuring, and related legal concepts.
  • Ability to build and operate production ML pipelines, evaluation systems, model-serving infrastructure, and monitoring.
  • Strong proficiency in Python for production-ready delivery.
  • Experience across the full model lifecycle, including experimentation, training, testing, monitoring, and deployment.
  • Strong product focus and desire to understand the end-to-end impact of solutions on users.
  • Good knowledge of AWS AI infrastructure.

Benefits

  • Competitive salary, equity, pension contributions with employer matching, private medical insurance, paid sick leave with income protection, and group life assurance.
  • Season ticket loan and Cycle to Work schemes.
  • 25 holiday days per year plus local public holidays, with the option to exchange holidays for alternative days.
  • Hybrid working model with flexibility over when and where to work.
  • Ability to work abroad for up to three months per year.
  • One month of paid sabbatical after five years of service.
  • Enhanced parental leave and flexible working arrangements.
  • Professional learning and development budget and an £800 annual AI experimentation budget.
  • Quarterly team socials and summer and winter company events.
9fin

About 9fin

501-1,000 employees
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