At a Glance
- Tasks: Design and build AI applications for complex financial workflows using cutting-edge technologies.
- Company: Join 9fin, the leading AI platform transforming global debt markets.
- Benefits: Competitive salary, private medical insurance, hybrid working, and generous holiday allowance.
- Other info: Enjoy a culture of inclusivity, professional growth, and exciting company events.
- Why this job: Make a real impact in AI while working with top-tier professionals in a dynamic environment.
- Qualifications: Deep experience in AI, machine learning, and recommendation systems is essential.
The predicted salary is between 81000 - 99000 £ per year.
About 9fin
9fin is the AI platform powering global debt markets — the world’s largest asset class at over $145 trillion. Debt markets are vast, global, and mission-critical, yet still run on fragmented data, PDFs, and manual workflows. 9fin replaces this broken infrastructure with a single platform that centralises proprietary credit data, deep analysis, and high-value workflows across global markets. Today, 9fin powers teams at 300+ blue-chip institutions worldwide, including global banks, asset managers, private equity firms, law firms, and advisors. The business is scaling at exceptional speed, with rapid expansion in the US and best-in-class retention driven by deep workflow adoption. With proven product-market fit and strong, global market pull, 9fin is accelerating toward becoming the category-defining platform for debt markets worldwide.
The Data Science team is growing at 9fin! 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. We are looking for a Senior AI Engineer to accelerate our application of AI across teams and products. Come and join us, you will get to build large-scale AI powered systems, learn and apply the latest techniques, and work alongside other great researchers and engineers!
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.
- Help lead/push the adoption of AI throughout 9fin.
- Learn from user behaviour, workflow context, and content signals to optimise discovery, prioritisation, and decision-making across feeds, alerts, search, and AI experiences.
- Build recommendation systems across feeds, alerts, search, and workflow products.
- Expertise with pointwise, pairwise, and listwise ranking approaches, including reranking, diversity, freshness, novelty, deduplication, and relevance optimisation.
- Experience modelling user intent, preferences, workflows, and engagement patterns.
- Familiarity with session-based learning, sequence modelling, and balancing short-term versus long-term user interests.
- Design and analyse A/B tests, define success metrics, understand selection bias, and evaluate ranking systems using both online and offline methodologies.
- Strong background in feature engineering, tabular machine learning, calibrated scoring systems, and production use of models such as gradient-boosted trees, logistic regression, and related approaches.
- Experience combining embeddings, semantic similarity, collaborative signals, and content understanding to build recommendation systems that perform well in sparse and cold-start environments.
- Incorporate relationships between companies, sponsors, lenders, law firms, instruments, documents, and events into ranking and recommendation decisions.
- Experience building feature pipelines, online and batch inference systems, low-latency ranking services, experimentation platforms, and monitoring for production machine learning systems.
- Strong proficiency in Python for production ready delivery.
- Good knowledge of AWS’s AI infrastructure.
We also offer huge amounts of responsibility, an abundance of opportunity for growth and a platform to truly excel.
Financial & Insurance:
- Competitive Salary (our salary bands are benchmarked at the top end of the market)
- 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, to allow you the flexibility to decide how, where and when you do your best work
- 1 month paid sabbatical after 5 years of service
- Enhanced parental leave & flexible working arrangements available
Training & Culture:
- Professional learning and development budget
- AI experimentation budget of £800 (UK) per employee to trial AI tools
- Summer and Winter company social events
At 9fin we are dedicated to building and promoting a fair and inclusive workplace where everyone can reach their full potential and truly belong. We recognise that building diverse teams enables a more creative and productive environment.
Senior AI Specialist (w/m/d) employer: 9fin
9fin is an exceptional employer located in Greater London, offering a dynamic work culture that fosters innovation and collaboration. With a focus on employee growth, the company provides competitive salaries, private medical insurance, and the flexibility of hybrid working arrangements, including opportunities for international work. Join us to be part of a forward-thinking team dedicated to delivering high-quality data solutions.
