About the Position

Join Cleo as a (Senior) Machine Learning Engineer

At Cleo, we're on a mission to revolutionize the way people manage their finances. We're looking for a brilliant (Senior) Machine Learning Engineer to join our team and help us build novel solutions to real-world financial problems. Whether it's creating chatbots to coach users on financial health, developing classifiers to understand transaction data, or optimizing transactions within our payments platform, your work will directly impact those most in need, helping to improve their financial health.

Responsibilities

Develop MMM and/or LTV models and deploy them into our production environments.
Integrate with LLMs hosted by OpenAI, Anthropic, GCP, AWS, and others.
Work cross-functionally with backend engineers, data analysts, UX writers, product managers, annotation teams, and others to ship features that improve our users’ financial health.
Take the initiative to propose and lead technical work towards problems that were previously unknown or poorly understood.
Mentor and advise colleagues on their choices of models, architecture, and evaluation.

Requirements

Experience in Growth, Marketing (MMM and/or LTV models).
Excellent knowledge of Data Science (Python, SQL) and production tools.
A deep understanding of probability and statistics fundamentals.
Top-tier communication skills to partner with Product and Commercial Leaders.
Industry-leading contributions to your field, communicated through conferences, blogs, talks, or open-source projects.
Advanced Degree in a quantitative discipline or equivalent commercial experience.

Nice to Have

Strong experience with additional programming languages, such as Java, Scala, C++.

We Offer

A competitive compensation package (base + equity) with 3-annual reviews, aligned to our termly OKR planning cycles.
If you're levelled as a Machine Learning Engineer (DS2) during our process:
- London, UK Hybrid (1 day per week in London office): £74,266 - £91,000 gross annually
- UK Remote (based outside London): £69,699 - £85,000 gross annually
If you're levelled as a Senior Machine Learning Engineer (DS3):
- London, UK Hybrid (1 day per week in London office): £94,059 - £115,000 gross annually
- UK Remote (based outside London): £88,938 - £109,000 gross annually
Work at one of the fastest-growing tech startups, backed by top VC firms, Balderton & EQT Ventures.
A clear progression plan. We want you to keep growing.
Flexibility. We can’t fight for the world’s financial health if we’re not healthy ourselves.
Work where you work best. We’re a globally distributed team.
Company-wide performance reviews every 4 months.
Generous pay increases for high-performing team members.
Equity top-ups awarded across all levels in performance reviews.
25 days annual leave a year + public holidays (+ an additional day for every year you spend at Cleo, up to 30 days).
1 month paid sabbatical after 4 years at Cleo.
6% employer-matched pension in the UK.
Private Medical Insurance via Vitality, dental cover, and life assurance.
Online mental health support via Spill.
Enhanced parental leave.
Workplace Nursery Scheme.
Paid for access to multiple AI platforms (ChatGPT, Codex, Claude).
Access to the latest AI coding models.
Pick your kit - choose between a Windows or an Apple computer.
Regular socials and activities, online and in-person.
And many more!

Final compensation will be determined based on the candidate's seniority, qualifications, skills, and previous experience.

We strongly encourage applications from people of colour, the LGBTQ+ community, people with disabilities, neurodivergent people, parents, carers, and people from lower socio-economic backgrounds.

About the Company

About Cleo

At Cleo, we're not just building another fintech app. We're embarking on a mission to fundamentally change humanity's relationship with money. Imagine a world where everyone, regardless of background or income, has access to a hyper-intelligent financial advisor in their pocket. That's the future we're creating.

Cleo is a rare success story: a profitable, fast-growing unicorn with over $300 million in ARR and growing over 2x year-over-year. This isn't just a job; it's a chance to join a team of brilliant, driven individuals who are passionate about making a real difference. We have an exceptionally high bar for talent, seeking individuals who are not only at the top of their field but also embody our culture of collaboration and positive impact.

If you’re driven by complex challenges that push your expertise, the chance to shape something truly transformative, and the potential to share in Cleo’s success as we scale, while growing alongside a company that’s scaling fast, this might be your perfect fit.

(Senior) Machine Learning Engineer

Job Description, Responsibilities & Requirements