{"id":15461,"url":"https://alion.io/job/9fin-senior-ai-engineer","title":"Senior AI Engineer","company":{"id":4757,"name":"9fin","domain":"9fin.com","url":"https://alion.io/company/9fin","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":79,"open_postings":7,"ghost_share":0,"stale_share":0.857,"repost_share":0,"time_to_fill_p50_days":44,"computed_at":"2026-10-17T05:46:00Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":125000,"max_usd":232000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":38},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Anomaly Detection","optional":false},{"name":"AWS","optional":false},{"name":"Computer Vision","optional":false},{"name":"Fine-tuning","optional":false},{"name":"GraphRAG","optional":false},{"name":"Knowledge Graph","optional":false},{"name":"Machine Learning","optional":false},{"name":"Python","optional":false},{"name":"Recommender Systems","optional":false}],"status":"live","first_seen_at":"2025-07-10T15:15:40Z","employer_posted_date":"2025-07-10","last_verified_at":"2026-10-17T15:33:52Z","board_verified":true,"closed_at":null,"days_open":464,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":463},"description":"About 9fin\n9fin is the AI platform powering global debt markets - the world’s largest asset class at over $145 trillion.\nDebt 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.\nToday, 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.\nWe’re at a defining inflection point. With proven product-market fit and strong, global market pull, 9fin is accelerating toward becoming the category-defining platform for debt markets worldwide.\nThe Opportunity\nThe 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!\nEvery day is different, but here's an example of the kind of things you'll work on:\nDesign 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.\n\nDrive end to end model development lifecycle, leading the team in best practices, ensuring reproducible research and well managed model delivery/deployment.\n\nCollaborate cross functionally to share diverse ideas, understand business problems, and elevate/mentor your teammates.\n\nTranslate complex problems into well-defined scoped bets in an internal startup style environment, dynamic and fast-paced.\n\nLearn and apply ground-breaking research and approaches in advanced topics, iterating improvements with a fail fast mentality.\n\nBe 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.\n\nAbout You\nThis role will be a great fit if you:\nStrong proficiency in Python for production ready delivery.\n\nYou’re an expert in any of the following areas - deep expertise in one and familiarity with others is ideal:\nInformation Retrieval: chunking strategies, (finetuning) embedding models, training re-rankers.\n\nEntity/relationship extraction/resolution\n\nKnowledge Graphs; building and inference, graphRAG\n\nRecommendation systems and ranking: personalisation, learning-to-rank, feed ranking, user modelling, etc.\n\nTabular ML: feature engineering, structured data modelling (GBDTs, etc.)\n\nStatistical & Predictive Modelling: supervised ML, anomaly detection, temporal modelling, etc.\n\nDeep understanding of the GenAI landscape and agentic frameworks.\n\nExperience working in the full model lifecycle (including experimentation, training, testing, monitoring, and deployment). We are data centric and love our evals!\n\nYou have a strong product focus with a desire to understand the end-to-end impact of your solutions for our end users.\n\nGood knowledge of AWS’s AI infrastructure.\n\nBenefits\nWe’re a scaling start up, and we enjoy sharing our success, when the company succeeds, we always reinvest that in our people. We also offer huge amounts of responsibility, an abundance of opportunity for growth and a platform to truly excel.\nFinancial & Insurance\nCompetitive Salary (our salary bands are benchmarked at the top end of the market)\n\nEquity\n\nPension (your minimum contributions are 4% with 9fin matching up to 7%)\n\nPrivate Medical Insurance\n\nPaid sick leave with Income Protection for long periods of illness\n\nGroup Life Assurance\n\nSeason Ticket Loan & Cycle to Work schemes\n\nTime off\n25 holiday days per year\n\nLocal public holidays (with the ability to exchange them for alternative days)\n\nHybrid working model\n\nWork abroad for up to 3 months a year\n\n1 month paid sabbatical after 5 years of service\n\nEnhanced parental leave & flexible working arrangements available\n\nTraining & Culture\nProfessional learning and development budget\n\nAI experimentation budget of £800 (UK) per employee to trial AI tools\n\nQuarterly team socials\n\nSummer and Winter company social events\n\n9fin is a hybrid company, and the office is a regular part of how we work. From January 2027, all employees will work from their designated 9fin office on Tuesdays and Wednesdays. Some teams may be asked to be in the office more often, where the nature of their work calls for it. For the rest of the week, you may work from wherever works best for you and your team.\n\n9fin is an equal opportunities employer\nAt 9fin we are dedicated to building and promoting a fair and inclusive workplace where everyone can reach their full potential and truly belong. We recognize that building diverse teams enables a more creative and productive environment. If you’re excited about this role but your experience doesn’t perfectly align with the job description, we encourage you to apply anyway. 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