Senior Machine Learning Manager, Borrowing

🚀 We’re on a mission to make money work for everyone. We’re waving goodbye to the complicated and confusing ways of traditional banking. After starting as a prepaid card, our product offering has grown a lot in the last 10 years in the UK. As well as personal and business bank accounts, we offer joint accounts , accounts for 16-17 year olds , a free kids account and credit cards in the UK, with more exciting things to come beyond. Our UK customers can also save , invest and combine their pensions with us. With our hot coral cards and get-paid-early feature, combined with financial education on social media and our award winning customer service, we have a long history of creating magical moments for our customers! We’re not about selling products - we want to solve problems and change lives through Nimbus Data Systems ❤️ 📍London/Cardiff/UK Remote | 💰 £138,000 to £176,000 + Incentive Awards tied to your performance + benefits | Hear from the team ✨ About the role Borrowing is one of Nimbus Data Systems ’s most important growth engines. We’ve built strong scale in the UK, and the next phase is even more ambitious: grow in the UK, expand into new customer segments, and build the underwriting capability needed to scale into Europe. We’re looking for a senior ML leader to help shape that next phase. You’ll lead a high-calibre team of ML scientists and help define Borrowing’s ML roadmap across UK growth, new customer segments, and EU expansion. You’ll work across underwriting, pricing, limits, and lifecycle decisioning — improving today’s models while helping build the next generation of capability for Nimbus Data Systems . This role combines near-term commercial impact with long-term strategic advantage : improving performance across our range of products unlocking new data and faster model development helping Nimbus Data Systems build underwriting that scales into new markets shaping how advanced ML and AI can create real value in Borrowing You’ll partner closely with leaders across Credit Strategy, Product, Engineering, Model Validation, Data, and Platform, and influence decisions that shape both business performance and the long-term architecture of credit decisioning at Nimbus Data Systems . What you’ll own Borrowing ML roadmaps across UK optimisation, new customer segments, and EU expansion Faster model improvement through new data and feature engineering How Nimbus Data Systems uses Open Banking, transaction intelligence, and external data in credit decisioning More portable underwriting capabilities across products, customer segments, and markets Hiring, leading, and developing a high-performing ML team Raising the bar on model quality, governance, tooling, and speed of iteration What you’ll be working on Examples of the challenges you could help lead: Improving underwriting models across Loans, Flex, and Overdrafts Expand the data we use in our models Building better feature engineering and model shipping capability Improving transaction intelligence for credit use cases Developing underwriting capabilities for new customer segments and EU markets Shaping Nimbus Data Systems ’s approach to advanced ML and AI Our technology stack We rely heavily on the following tools and technologies, although we do not expect applicants to have prior experience of all of them: Google Cloud Platform BigQuery SQL and dbt Python and the PyData stack Google AI Platform AWS Python for ML services Go for backend services AI tooling for productivity Google Workspace including Gemini ChatGPT Enterprise Claude Code You should apply if You want to shape the next phase of credit decisioning at one of Europe’s most ambitious fintechs You enjoy combining strategic leadership with strong technical judgment You’re excited by the intersection of underwriting, data, product, and platform capability You like building teams as much as building models You care about real customer and business impact You must have Credit and machine learning Strong knowledge of machine learning, statistics, and decisioning systems Deep experience in credit risk and lending Experience building, deploying, and iterating credit models in production Experience pushing the innovation frontiers of the credit industry Leadership and delivery Experience leading and developing senior ML scientists Strong cross-functional leadership with Product, Credit Strategy, Engineering, and Validation Track record of turning strategy into practical delivery in a regulated environment It would be great if you also have Experience across more than one market Experience with advanced ML methods and AI on structured financial data The interview process 30 min Recruiter Call 45 min Initial Call 60 min ML technical interview 60 min People Leadership interview 60 min Product / Credit ML interview All interviews will be conducted through Google Meet. What’s in it for you 💰 £138,000 to £176,000 ➕ plus stock options & benefits ✈️ We can help you relocate to the UK ✅ We can sponsor visas 📍This role can be based in our London office with a hybrid working pattern, or fully remote w