Senior AI Engineer

9Fin

Contract type

Ongoing

Work mode

Hybrid · 2 days/week in office · London, United Kingdom

Experience

Senior · Not stated

Level inferred from job title

Job description

Senior AI Engineer on 9fin's Data Science team, building large-scale AI-powered systems and generative AI applications for complex financial and legal workflows.

At a glance

Employment: Full-time · Employee (employment agreement)
Work mode: Hybrid · 2 days/week in office · London, United Kingdom

What you'll do

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. We want you to help lead/push the adoption of AI throughout 9fin.

What we're looking for

Strong proficiency in Python for production ready delivery.
Expert in any of the following areas - deep expertise in one and familiarity with others is ideal: Information Retrieval: chunking strategies, (finetuning) embedding models, training re-rankers; Entity/relationship extraction/resolution; Knowledge Graphs; building and inference, graphRAG; Recommendation systems and ranking: personalisation, learning-to-rank, feed ranking, user modelling, etc.; Tab
Deep understanding of the GenAI landscape and agentic frameworks.
Experience working in the full model lifecycle (including experimentation, training, testing, monitoring, and deployment). We are data centric and love our evals!
Strong product focus with a desire to understand the end-to-end impact of your solutions for our end users.
Good knowledge of AWS's AI infrastructure.

Your team

Data Science team

We are doing world-class work with groundbreaking technologies to build data-driven products using machine learning, computer vision, natural language processing, speech and audio, and knowledge/data mining.

Benefits

Competitive Salary (our salary bands are benchmarked at the top end of the market)
Equity
Pension (your minimum contributions are 4% with 9fin matching up to 7%)
Private Medical Insurance
Paid sick leave with Income Protection for long periods of illness
Group Life Assurance
Season Ticket Loan & Cycle to Work schemes
25 holiday days per year
Local public holidays (with the ability to exchange them for alternative days)
Hybrid working model
Work abroad for up to 3 months a year
1 month paid sabbatical after 5 years of service
Enhanced parental leave & flexible working arrangements available
Professional learning and development budget
AI experimentation budget of £800 (UK) per employee to trial AI tools
Quarterly team socials
Summer and Winter company social events

Save

About 9fin

The AI platform powering global debt markets

9fin is the AI platform powering global debt markets — the world's largest asset class at over $145 trillion. 9fin replaces fragmented data, PDFs, and manual workflows with a single platform that centralises proprietary credit data, deep analysis, and high-value workflows across global markets.

Key facts

Financial technology / debt markets data platform
Powers teams at 300+ blue-chip institutions worldwide, including global banks, asset managers, private equity firms, law firms, and advisors
Rapid expansion in the US and best-in-class retention driven by deep workflow adoption
Hybrid company; from January 2027, all employees will work from their designated 9fin office on Tuesdays and Wednesdays