Lead Machine Learning Scientist, Search

Devconnectplatform; Greater London; Hybrid; GBP 115,000 - 150,000; Part time

Benefits offered by this job

Relocation assistance

Visa sponsorship

Learning budget £1,000/year

Flexible working hours

Job summary

Monzo in the UK is seeking a Lead Machine Learning Scientist to build and deploy scalable ML models that help customers search for and understand their financial lives. You’ll be a technical leader on a cloud-native data platform serving billions of rows of data, balancing speed, accuracy and business impact.

You’ll work with Python, SQL and Go, apply embeddings, contextual bandits and ranking algorithms, and develop explainable AI that improves trust and the customer experience.

Qualifications

• Proven track record of developing and deploying advanced ML models to tackle real business problems.

Responsibilities

• Lead ML modelling and deployment for production-scale search and discovery.
• Collaborate with Backend, ML Scientists, and Data Scientists to deliver end-to-end solutions.
• Build explainable and responsible AI that improves trust and customer experience.

Skills

Python

SQL

Go

Scikit-learn

Production ML

Leadership

Tools

Go Lang

Job description

# Lead Machine Learning Scientist, SearchMonzo115k–150k GBPPart-timeremote· leadUKpythonsqlgoListed via Jobicy · posted 23 Oct 2026. The application happens there, not on DevConnect.Apply on Jobicy## DescriptionWe’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 Monzo London/Cardiff/UK Remote | £115,000 - £150,000 + Incentive Awards tied to your performance + Benefits About our Machine Learning Search TeamWe are currently embarking on one of our two top strategic priorities to make Money work for Everyone: building the Monzo Co-pilot. We are becoming an intelligent, proactive ally that handles the complexity of users financial life. We aren't just selling financial products; we are building a truly smart agent that understands users, anticipates their needs, and helps people reach their financial goals.Our ML Search team brings together Backend, Product, Machine Learning Scientists and Data Scientists. As a Lead Machine Learning Scientist, you’ll build and ship models that help customers search for and find answers about their financial lives. You'll make it effortless for them to find the right products at the exact moment they need them.Whether it’s surfacing the right savings product at the perfect moment, helping customers manage their spending, or simplifying financial planning, our work makes banking smarter, more intuitive, and truly customer-first.What you’ll be working on:As a Lead Machine Learning Scientist, you'll be a technical leader and individual contributor. We have a modern, cloud-native data platform with billions of rows of data built for fast iterations. You'll leverage your deep expertise to develop and deploy advanced ML models to our more than 15 million customers.Your work may involve user and product embeddings to better understand customer behaviours, contextual bandits for optimising real-time decisions, or personalised ranking algorithms that improve search and discovery. You'll also build scalable, explainable, and responsible AI solutions that enhance trust, transparency, and the overall customer experience.The technical approaches you take to help solve customer problems will be very much in your hands and we’ll strongly encourage and support experimentation and innovation. We’ll be expecting you to justify and demonstrate effectiveness along the way, making sure the approach meets our business and customer needs.You should apply if:What we’re 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- 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 speak Python fluently and have extensive, hands-on experience with scikit-learn. You are comfortable using SQL, and keen to learn Go lang which is used in many of our backend microservices- You’re 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- You’re adaptable, curious and enjoy learning new technologies and ideasNice to haves:- Experience working on personalisation, ranking & recommendation problems for consumer applications- Commercial experience writing critical production code and working with microservicesThe interview process:Our interview process involves 3 main stages. We promise not to ask you any brain teasers or trick questions!30 minute recruiter call45 minute call with hiring managerFull Loop: ML Modelling Interview, Product & ML interview, Behavioural Interview, Leadership interviewOur average process takes around 3-4 weeks but we will always work around your availability.What’s in it for you: We can help you relocate to the UK We can sponsor visasThis role can be based in our London office, but we're 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 £1,000 a year for training courses and conferencesAnd much more, see our full list of benefits hereIf 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-SR1Equal opportunities for everyoneDiversity and inclusion are a priority for us and we’re making sure we have lots of support for all of our people to grow at Monzo. At Monzo, we’re 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.We’re 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 don't need full or birth names at application stage