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Lead Machine Learning Scientist, Customer Operations

MonzoCardiff, London or Remote (UK)Data
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Salary
£115K - £150K GBP
Job type
Full-time
Work mode
Remote
Posted
3 Aug 2026
Status
Open · checked 7d ago

About this role

Monzo is seeking a Lead Machine Learning Scientist to join the Data department in London, Cardiff, or on a remote basis within the UK. This senior technical individual contributor role suits an experienced machine learning professional eager to transform customer operations through advanced artificial intelligence and human-in-the-loop systems.

Role Overview

As a Lead Machine Learning Scientist within the Customer Operations team, you will spearhead initiatives to revolutionize customer support. The position focuses on leveraging state-of-the-art machine learning techniques, including large language models and autonomous agents, to understand and route customer issues. You will operate within an agile, cross-functional product squad alongside data scientists, engineers, product managers, designers, and researchers to scale support operations efficiently.

Key Responsibilities

Collaborate with company stakeholders to scope and identify high-impact opportunities for transforming customer operations using machine learning.
Lead the design and creation of advanced machine learning models, exploring LLMs, RAG, and sequence-based architectures to improve query resolution.
Provide technical leadership, mentor colleagues, and drive high technical standards across the broader machine learning discipline.
Guide technical strategy alongside backend engineers and MLOps teams to ensure rapid iteration and optimal model lifecycles.

Requirements

Extensive background in leading the development and deployment of advanced machine learning models to solve real business challenges.
Proven experience shipping deep learning, graph-based, or sequence-based ML architectures to production with measurable impact.
Strong proficiency in writing production Python code and working with SQL daily.
Ability to thrive in environments with ambiguity and a strong self-starter mindset.
Exceptional product mindset with a passion for data-informed decision-making and customer outcomes.

Nice to Have

Experience working in customer operations, capacity planning, forecasting, or regulated institutions.
Commercial background writing critical production code and building microservices.

Skills and Tools

Python
SQL
RAG
MLOps
Deep Learning Architectures
Large Language Models (LLMs)

Salary and Benefits

Annual salary ranging from £115,000 to £150,000.
Performance-tied incentive awards and comprehensive benefits.
Visa sponsorship and UK relocation assistance available.
Flexible working hours and a £1,000 annual learning budget for conferences and training courses.

About the Company

Monzo is transforming traditional banking with a mission to make money work for everyone. Moving beyond prepaid cards, the company offers personal, business, joint, and teen accounts, alongside credit, savings, investments, and pension consolidation. Known for hot coral cards and award-winning customer service, Monzo focuses on solving real financial problems and changing lives.

How to Apply

To apply for this role, please visit the official Monzo careers page.

Skills and tech stack

Questions candidates ask

Where is the Lead Machine Learning Scientist position located?

The role can be based in the London office, the Cardiff office, or handled via remote working within the UK with ad-hoc meetings in London.

What is the salary range for this role?

The salary ranges between £115,000 and £150,000 per year, accompanied by performance-tied incentive awards and standard company benefits.

What technical skills are required?

Applicants need extensive experience writing production Python code, a strong command of SQL, and a track record of deploying deep learning, graph-based, or sequence-based machine learning architectures to production.

Does Monzo offer visa sponsorship or relocation assistance?

Yes, Monzo can sponsor visas and assist with relocating to the United Kingdom for this position.

What does the interview process look like?

The process includes a 30-minute recruiter call, a 45-minute hiring manager call, and a full loop covering an ML modelling interview, a product and ML interview, a behavioural interview, and a leadership interview.

Ready to apply?

The application is on the official Monzo careers page.

Apply on company site