Staff Product Engineer - Ruby | UK (hybrid + remote) Office: United Kingdom

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.

What you’ll be doing:

• Acting as a Staff IC across a pillar, shaping technical direction and driving delivery across multiple squads
• Partnering with senior peers to define architecture and lead complex, high-impact initiatives
• Bringing teams together to ship ambitious product work that improves users’ financial health
• Building shared systems, patterns, and tooling that raise the bar across engineering
• Staying hands-on in our Ruby on Rails monolith — designing APIs, data models, and scalable services
• Anticipating risks and opportunities early, influencing plans and technical strategy
• Mentoring engineers and TLs, growing the next generation of technical leaders

About you:

• You’re excited by the opportunity to own and influence technical direction at a pillar level
• You’ve operated at senior/staff level across multiple teams or complex domains
• You bring strong technical judgment and think in long-term, scalable solutions
• You’re comfortable leading without authority and aligning teams around a shared direction
• You have a track record of building systems and practices used beyond your immediate team
• You enjoy mentoring and raising the bar for others
• You have strong, hands-on experience with Ruby on Rails (essential)

Our Tech Stack:

Cleo is built as a Ruby on Rails monolith with a single React Native app frontend, utilising TypeScript. We also leverage Python for machine learning services and PostgreSQL for our database, all hosted on AWS. Our CI/CD pipeline is fully automated, with production deployments happening on every merge via Kubernetes. Our backend engineers deploy multiple times a week, and we release our frontend app to Google and Apple for review at least once a week. While we take a pragmatic approach, we place a strong emphasis on quality. Our code is peer-reviewed, and we maintain automated testing using Minitest and CircleCI. We’re also actively working towards a more modular architecture, focusing on separating concerns to achieve all the benefits of microservices within a monolith, while progressively refactoring our code as we build new features. Everyone in the engineering team contributes to driving our technical strategy, voices & ideas from all levels are valued: we are all owners at Cleo.

What do you get for all your hard work?

• A competitive compensation package (base + equity) with 3 annual reviews, aligned to our termly OKR planning cycles.
• 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. That means trying new things, leading others, challenging the status quo and owning your impact. Always with our complete support.
• Flexibility. We can’t fight for the world’s financial health if we’re not healthy ourselves. We work with everyone to make sure they have the balance they need to do their best work.
• Work where you work best. We’re a globally distributed team. If you live in London we have a hybrid approach, we’d love you to spend one day a week or more in our beautiful office. If you’re outside of London, we’ll encourage you to spend a couple of days with us a few times per year. And we’ll cover your travel costs, naturally.
• Other benefits include company-wide performance reviews every 4 months, generous pay increases for high-performing team members, equity top-ups for team members getting promoted, 25 days annual leave a year + public holidays (+ an additional day for every year you spend at Cleo, up to 30 days), 6% employer-matched pension in the UK, private medical insurance via Vitality, dental cover, life assurance, enhanced parental leave, 1 month paid sabbatical after 4 years at Cleo, regular socials and activities, online and in-person, OpenAI subscription coverage, online mental health support via Spill, workplace nursery scheme, and many more!

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. If there’s anything we can do to accommodate your specific situation, please let us know.