Lead Machine Learning Scientist, Customer Operations
Monzo Ā· Cardiff, London or Remote (UK)
Lead Machine Learning Scientist, Customer Operations at Monzo, based in Cardiff, London or Remote (UK), paying £115,000 - £150,000 per annum. This is a permanent role.
- Salary
- £115,000 - £150,000 per annum
- Location
- Cardiff, London or Remote (UK)
- Contract
- Permanent
- Posted
- 5 days ago
- Closes
- 6 Sep 2026
- Sector
- Machine Operator
About 159% above the going rate for machine operator
Reference 8103509
About the role
š Weāre on a mission to make money work for everyone.
Weāre 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 asĀ 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 andĀ combine their pensions with us.Ā
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!
Weāre not about selling products - we want to solve problems and change lives through Monzo ā¤ļø
Ā
šLondon/Cardiff/UK Remote | š° Ā£115,000 - Ā£150,000 + Incentive Awards tied to your performance + BenefitsĀ āØ
About our Machine Learning Operations team:The challenges are significant: we aim to transform customer service by reducing the time and effort required to resolve issues, enhancing customer confidence and satisfaction. As part of Operations, youāll be at the forefront of our mission to provide unparalleled customer support experiences.
Your role will be pivotal in leveraging state-of-the-art machine learning techniques (including LLMs and autonomous agents) to understand customer problems. You will lead the development of an effective human-in-the-loop system that augments automation with the efforts of our support workforce (who we call COps). This allows us to more expediently and efficiently predict, identify, disambiguate, and route customer problems at scale to support a rapidly expanding company with global ambitions across multiple geographies.
Youāll be working closely with a team of Machine Learning Scientists in Operations, embedded in product squads alongside data scientists, backend, mobile and web engineers, product managers, user researchers, designers, and operations specialists.
Your day-to-day:As a technical individual contributor, youāll be providing technical leadership and shipping highly impactful ML-based solutions. Youāll be embedded in a cross-functional product squad, working closely with product managers, data scientists, backend engineers, and designers in an agile environment. Youāll also be a technical leader within the wider Machine Learning discipline, helping to steer technical work and drive up standards.
This will involve:
-
Working with stakeholders across the organisation to identify and scope out the most impactful opportunities to transform Customer Operations with Machine Learning.
-
Leading the design and development of advanced Machine Learning models, exploring how LLMs, RAG, and sequence-based architectures can drive improvements in query resolution and routing.
-
Providing technical leadership to drive up levels of technical expertise and best practice across the Machine Learning discipline, leading by example and mentoring others.
-
Steering ongoing technical strategy, working closely with our MLOps team and backend engineers to enable rapid iteration of models and optimisations of the full ML model lifecycle.
What weāre 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 deep learning, graph-based, and/or sequence-based ML architectures to production and delivering business impact
-
You're 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 have extensive experience writing production Python code and a strong command of SQL. You are comfortable using them every day, and keen to learn Go lang which is used in many of our backend microservices
-
youāre 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 you (and the people you know) use every day
-
you have a product mindset: you care about customer outcomes and you want to make data-informed decisions
-
You're excited about fast-moving developments in Machine Learning and can communicate those ideas to colleagues who are not familiar with the domain
-
Youāre adaptable, curious and enjoy learning new technologies and ideas
-
Experience working with customer operations, capacity planning, forecasting, or in regulated institutions.
-
Commercial experience writing critical production code and working with microservices.
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 [email removed]. Please also use that email to let us know if there's anything we can do to make your application process easier for you, because of disability, neurodiversity or any other personal reason.
Whatās in it for you:āļø We can help you relocate to the UK
ā We can sponsor visas
šThis role can be based in our London office, but we're open to distributed working within the UK (with ad hoc meetings in London).
ā° 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.
šLearning budget of Ā£1,000 a year for training courses and conferences
āAnd much more, see our full list of benefits here
If you prefer to work part-time, we'll 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 weāre making sure we have lots of support for all of our people to grow at Monzo. At Monzo, weāre embracing diversity by fostering an inclusive environment for all people to do the
Reference: 8103509 Ā· Posted 5 days ago Ā· Closes 6 Sep 2026 Ā· Listed via Monzo
Apply for this job
This role is listed via Monzo. Applications are handled on the employer's site.
Apply on employer siteOpens the employer's website in a new tab.
Safe applying: a genuine employer will never ask you to pay for a DBS check, training or equipment, or move you onto WhatsApp before you are hired. If this listing does, report it and do not pay anything.