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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 ✨
Our Financial Crime Data team consists of over 25 people across 4 data specialisms: Analytics Engineers, Data Analysts, Machine Learning Scientists and Data Scientists. As a Lead Machine Learning Scientist, you’ll be working in a fast moving environment, building and iterating on our financial crime defensive capabilities to ensure we keep Monzo and our customers safe.
Our financial crime team has a large impact on Monzo’s bottom line as fraud and scams are usually some of the largest cost line items in a bank's P&L. We have a major influence on the overall customer experience and it’s our duty to keep our customers safe. The work we do results in directly measurable customer or company benefit, which is incredibly satisfying.
Our Machine Learning Scientists work on a range of problems within the different financial crime areas ranging from fraud detection and prevention, transaction monitoring for different types of suspicious activity through to customer risk assessment and operational tooling.
A Lead Machine Learning Scientist at Monzo is a technical Individual Contributor (IC) leadership position. As a technical Machine Learning expert, working with billions of rows of data stored on a modern cloud native data platform, we’ll be expecting you to leverage your deep experience of developing and deploying advanced Machine Learning models to:
The technical approaches you take to help 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.
As a technical individual contributor, you’ll be providing technical leadership and shipping highly impactful ML-based solutions. You’ll be embedded in a cross functional product squad, working closely with product managers, data scientists, backend engineers and designers in an agile environment. You’ll also be a technical leader within the Machine Learning discipline, helping to steer technical work and drive up standards.
This will involve:
What we’re doing here at Monzo excites you!
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 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.
✈️ 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-SR1
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 😊
GBP 115,000 - 150,000
Annually
Health Insurance
Employee Assistance Program
Mental Health Benefits
Fitness Stipend
Wellness Programs
Life Insurance
Performance Bonus
Stock Options
Commuter Benefits
401(k) / Retirement Plan
Flexible Schedule
PTO / Vacation
Paid Holidays
Sabbatical
Company Equipment
Parental Leave
Fertility Benefits
Learning & Development Budget
Conference Attendance
Book Stipend
Defined Career Pathways
Team Events & Social Budget
Free Snacks & Drinks
Employee Resource Groups
No. Monzo's senior backend engineering posting says there is no mandated requirement on office attendance, even for engineers who live nearby, though the company values meeting in person. If you live outside London and are asked to come in, Monzo supports you with the costs. The offices are most social on Tuesdays, Wednesdays and Thursdays.
Remote roles at Monzo are UK-only. Most UK postings are listed as "Cardiff, London or Remote (UK)", and its engineering posting says engineers live everywhere in the UK, from Brighton to the Western Isles. Roles in Barcelona, Madrid and Dublin are office-located, and visa sponsorship is available for certain roles.
Monzo says it trusts people to work enough hours to do the job well, at times that suit them and their team. Customer operations roles are the exception and work set shifts. Engineering keeps meetings within core hours, and Monzo says it will make part-time working happen whenever it can.
Monzo offers 26 days' holiday plus bank holidays, or 34 days if you opt out of bank holidays. Everyone can also take 1 month of unpaid leave every year, and there are 8 weeks of paid sabbatical leave after every 5 years of service. Compassionate leave is 10 days as standard, with grief counselling.
Primary caregivers get 26 weeks at full pay, then 13 weeks at statutory maternity pay and 13 weeks unpaid, after 13 weeks of service. Secondary caregivers get 13 weeks at full pay plus 39 weeks unpaid. Monzo also offers up to 12 weeks of paid neonatal leave, up to 8 days of paid fertility treatment leave a year, up to 10 days of additional paid leave for pregnancy loss, and fertility and family-forming health education.
Salaries are reviewed every year, and an Incentive Award tied to performance can be paid as cash, equity or a mix. Monzo contributes 4% of base salary to your pension and matches additional contributions up to a maximum of 6%. Each employee gets a learning budget of 1,000 pounds a year for books, training courses and conferences, and at least one engineering posting publishes its salary range alongside the role's level. Monzo is also an accredited Living Wage employer.
401(k) Match
Sick Days
Bereavement Leave