Lead Machine Learning Scientist, Business Banking

Were on a mission to make money work for everyone.

Were 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 aspersonal 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 andcombine 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!

Were not about selling products - we want to solve problems and change lives through Monzo

London/Cardiff/UK Remote 115000 - 150000 Incentive Awards tied to your performance Benefits

Our mission in Business Banking is to simplify banking for small businesses;making business banking fairer simpler and more transparent. Monzo Business Banking is fast-growing is the UKs most recommended business account for overall service quality. We recently hit 1 million customers and are used by 1 in 6 UK SMEs.

We want to help businesses spend less time on financial admin and more time focused on running and growing their business. Were building intelligent data-driven and AI/ML-enabled product experiences that help small businesses feel more in control make better decisions and get more value from Monzo.

ML is at the core of how we build and scale our products enabling Monzo to make better decisions faster and helping us serve businesses more effectively.

As a Lead Machine Learning Scientist in Business Banking youll help build and ship models that power the next generation of Business Banking experiences. Youll work closely with Product Engineering Design Research Data Science and Analytics Engineering to bring ML-enabled product capability into the heart of how we build for businesses.

Whether its helping businesses understand their cash flow reducing manual admin surfacing the right insight at the right moment or helping teams build intelligent product experiences responsibly our work makes business banking smarter simpler and more useful for SMEs.

As a Lead Machine Learning Scientist youll be a technical leader and hands-on individual contributor spearheading our ML and GenAI capabilities and shipping key models that powers magical Business Banking experiences.

Youll:

• Be one of the first ML Scientists in Business Banking bringing leadership through ambiguity by adding structure and direction to our ML capabilities while staying agile and building momentum.
• Develop and deploy advanced ML models on our cloud-native data platform to serve hundreds of thousands of business customers.
• Partner with Product data science and other stakeholders to identify the highest-impact opportunities size impact and define success metrics.
• Decide when to use ML GenAI or simpler approaches and be clear on trade-offs.
• Design robust evaluation and monitoring so we can ship responsibly and measure impact in production.
• Lead the design and implementation of batch and near-real-time models (e.g. LLM-powered experiences predictive models time-series forecasting).
• Collaborate closely with MLOps and Backend Engineering to operationalise models end-to-end and raise the bar on ML lifecycle rigor.
• Set technical standards mentor others and support experimentation and iteration.

What were doing here at Monzo excites you!

• You have a multiple year track record of excellence leading the development and deployment of advanced Machine Learning models to tackle real business problems preferably in a fast-moving tech company.
• You have experience developing and shipping state-of-the-art ML models to production and delivering business impact.
• Youre impact-driven and excited to own the end-to-end journey that starts with a business problem and ends with your solution having a measurable impact in production.
• You have a self-starter mindset; you proactively identify issues and opportunities and tackle them without being told to do so.
• You speak Python fluently and have extensive hands-on experience with scikit-learn. You are comfortable using SQL and keen to learn Go which is used in many of our backend microservices.
• Youre comfortable working in a team that deals with ambiguity and have experience helping your team and stakeholders resolve that ambiguity.
• You want to be involved in building a product that small businesses use to run and manage their financial lives every day.
• You have a product mindset: you care about customer outcomes and you want to make data-informed decisions.
• Youre excited about fast-moving developments in Machine Learning and AI and can communicate those ideas to colleagues who are not familiar with the domain.
• Youre adaptable curious and enjoy learning new technologies and ideas.
• Youre excited by the opportunity to help Business Banking evolve into AI and ML-enabled product capability.
• You can work closely with Product Engineering Design Research and Data colleagues to shape product strategy clarify trade-offs and build things that customers actually use.
• Youre thoughtful about responsible ML/AI; especially in financial products where trust transparency and customer control matter.

• Experience working on personalisation ranking recommendation forecasting classification or decisioning problems for customer-facing applications.
• Experience working on ML systems for fintech banking accounting payments lending invoicing cash flow tax risk or business software.
• Experience with GenAI LLMs agentic workflows retrieval evaluation frameworks or human-in-the-loop product experiences.
• Commercial experience writing critical production code and working with microservices.
• Experience designing experiments A/B tests or other approaches to measure product and customer impact.
• Experience working in regulated environments or with products where explainability auditability and customer trust are especially important.

Our interview process involves 3 main stages. We promise not to ask you any brain teasers or trick questions!

30 minute recruiter call

45 minute call with hiring manager

Full Loop: ML Modelling Interview Product & ML interview Behavioural Interview Leadership interview

Our average process takes around 3-4 weeks but we will always work around your availability. You will have the chance to speak to our recruitment team at various points during your process but if you do have any specific questions ahead of this please contact us on . Please also use that email to let us know if theres anything we can do to make your application process easier for you because of disability neurodiversity or any other personal reason.

We can help you relocate to the UK

We can sponsor visas

This role can be based in our London office but were open to distributed working within the UK (with ad hoc meetings in London).

We offer flexible working hours and trust you to work enough hours to do your job well at times that suit you and your team.

Learning budget of 1000 a year for training courses and conferences

And much more see our full list of benefits here

If you prefer to work part-time well make this happen whenever we can - whether this is to help you meet other commitments or strike a great work-life balance

#LI-REMOTE #LI-SR1

Equal opportunities for everyone

Diversity and inclusion are a priority for us and were making sure we have lots of support for all of our people to grow at Monzo. At Monzo were embracing diversity by fostering an inclusive environment for all people to do the best work of their lives with us. This is integral to our mission of making money work for everyone. You can read more in our blog 2026 Diversity and Inclusion Report and 2025 Gender Pay Gap Report.

Were an equal opportunity employer. All applicants will be considered for employment without attention to age ethnicity religion sex sexual orientation gender identity family or parental status national origin or veteran neurodiversity or disability status.

If you have a preferred name please use it to apply. We dont need full or birth names at application stage