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Monzo

Senior Machine Learning Scientist, Customer Operations

Cardiff
£115k – £150k/yr
Posted about 24 hours ago
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🚀 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 Monzo ❤️

📍London/Cardiff/UK Remote | 💰 £115,000 - £150,000 + Incentive Awards tied to your performance + Benefits ✨

About our Machine Learning Operations team:

The challenge is 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, you’ll 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, to understand customer problems, to develop an effective human-in-the-loop system that augments automation with the efforts of our support workforce (who we call COps) 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.

You’ll be one of 4 ML engineers in Operations, embedded in product squads working alongside data scientists, backend, mobile, and web engineers, product managers, user researchers, designers, and operations specialists.

What you’ll be working on:

We’ll be expecting you to leverage your deep experience of developing and deploying advanced Machine Learning models to:

  • Understand customers’ problems and support needs based on a variety of inputs.
  • Route customers to the right COp who can support them and globally optimize those routing decisions across millions of customers and thousands of support staff.
  • Automate the resolution of customers’ support needs through autonomous agents.
  • Aid customer support in decision-making and pattern detection.

Reasons to use Rodeo

I’m in my final year doing Economics and I don’t know whether to apply for grad schemes now or do a masters first. What do you think?

Honest answer — it depends on where you want to end up. A lot of top grad schemes (Big 4, civil service, banking) don’t need a masters. Let’s look at the ones you’d be competitive for now, and we can decide if a masters actually adds anything.

Also worth knowing: most autumn 2026 applications are open now. Timing matters more than you think.

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Grad scheme, placement, apprenticeship? Not sure what you want yet — that's fine. Your agent talks it through with you and turns "I have no idea" into a shortlist.

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Graduate Consultant — 2026 Scheme

PwC¡London, UK
ÂŁ35,000/yr

Why you're a good match

Strong

Your economics background and your summer at a regional bank line up with what PwC looks for on the consulting scheme. Applications close in four weeks.

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It searches the market for you

Every day your agent scans the market matching roles against what actually matters to you, not just keywords on a CV.

Why you're a good match

You’ve got the grades and the economics background, and your bank internship is exactly the experience this scheme looks for. Apply soon — deadlines close within the month.

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Strong

Experience fit

Your summer at the bank plus your econometrics coursework map directly to the day-one responsibilities on this scheme — client modelling, market briefings, and deal support.

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Strong

Only hits

No noise. No "maybe this fits." Just roles with a clear explanation of why they're right — and where to focus when applying.

The technical approaches you take to solve these 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 track record of executing on the development and deployment of advanced Machine Learning models tackling real business problems with demonstrable impact, 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.
  • Using advanced machine learning techniques to directly improve customer support experiences and globally optimize routing and prioritization across millions of customers and thousands of support staff sounds exciting to you.
  • 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.
  • You thrive working on ambiguous problems.
  • You want to be involved in building a product that you and the people you know use every day, with a product mindset that prioritizes customer outcomes and data-informed decisions.
  • You’re adaptable, curious, and enjoy learning new technologies and ideas.

Nice to haves:

  • Experience working with operations, financial crime, and in regulated institutions.
  • Commercial experience writing critical production code and working with microservices.

The interview process:

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

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Get help applying for this job
  • 30-minute recruiter call
  • 45-minute call with hiring manager
  • 60-minute ML Modelling interview
  • 60-minute Product & ML interview
  • 60-minute behavioral 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 at tech-hiring@monzo.com. 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.

What’s in it for you:

✈️ We can help you relocate to the UK

✅ We can sponsor visas

📍This 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 conferences

➕And 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 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 😊

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Skills

Machine Learning
Python
SQL
Deep Learning
LLMs
Graph-based ML
Sequence-based ML
Data Science
Product Management
Go lang
Microservices
Automation
Predictive Modeling
Customer Support Optimization

Location

London, England, United Kingdom

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