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- Tasks: Join a dynamic team to build innovative financial products that improve users' financial health.
- Company: Cleo, a fast-growing fintech unicorn on a mission to change money management.
- Benefits: Competitive salary, equity options, flexible work, and generous leave policies.
- Other info: Inclusive culture with strong support for personal and professional growth.
- Why this job: Make a real impact with cutting-edge technology while collaborating with passionate professionals.
- Qualifications: Experience in any modern tech stack; curiosity and collaboration are key.
The predicted salary is between 60000 - 80000 ÂŁ per year.
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.
About the Company
Cleo is a profitable, fast‑growing unicorn with over $300 million in ARR and more than 2× year‑over‑year growth. We’re building a team of brilliant, driven individuals passionate about making a real difference. We have a high bar for talent and a culture of collaboration and positive impact.
About the Role
We care more about how you think than the language you’ve used. While much of our product runs on Ruby, we deliberately hire polyglot engineers to bring diverse technical backgrounds. If you’ve shipped meaningful product work in any modern stack, you’ll ramp quickly. Curiosity, thoughtful engineering, and a willingness to learn matter most.
Responsibilities
- You’ll join a cross‑functional product squad and work closely with engineers, designers, analysts, and product partners to build features that improve our users’ financial health.
- You’ll shape the direction of upcoming work, break down problems with your team, and help drive projects from early discovery to shipped impact.
- Day‑to‑day you’ll work across our backend and product systems—much of which runs in Ruby—but you don’t need Ruby experience to thrive.
- You’ll build and evolve APIs, data models, and business logic; contribute to testing, observability, and experimentation; and help us continuously improve developer experience and product quality.
- Along the way you’ll mentor others at your level, share knowledge, and contribute to a culture where engineers grow quickly and have real influence.
A few examples of the work our engineers have shipped recently:
- Building a secured credit card
- Launching new budgeting and financial insight features
- Running subscription and pricing experiments
About You
You care about building products that genuinely help people. You’re an engineer with solid fundamentals who has worked in any modern tech stack—the exact language isn’t important. What matters is your ability to reason clearly, learn quickly, consider trade‑offs, and write maintainable, thoughtful code. You collaborate well with product, design, and data; you’re curious about users; and you enjoy shaping work beyond the technical bits. Whether you’re mid‑level, senior, or leading teams, you contribute positively to engineering culture, support others, and help raise the bar for those around you. You align with our values and engineering principles—rooted in autonomy, accountability, pragmatism, and building things that genuinely improve people’s lives.
Tech Stack
Cleo is built as a Ruby on Rails monolith with a single React Native app frontend using 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 Heroku. Backend engineers deploy multiple times a week, and we release our front‑end app to Google and Apple for review at least once a week. We place a strong emphasis on quality: code is peer‑reviewed, and we maintain automated testing with Minitest and CircleCI. We’re also moving toward a more modular architecture, progressively refactoring our code as we build new features.
Benefits
- A competitive compensation package (base + equity) with three annual reviews, aligned to termly OKR planning cycles.
- Public progression framework and salary bandings.
- Fast‑growing tech startup backed by top VC firms, Balderton & EQT Ventures.
- Clear progression plan; leadership and challenge opportunities.
- Flexibility to balance well.
- Globally distributed team; hybrid in London with travel cover.
- Equity top‑ups, generous pay increases, and more.
- 25 days annual leave + public holidays (+ additional day per year at Cleo, up to 30).
- 6% employer‑matched pension (UK).
- Private medical insurance, dental cover, and life assurance.
- Enhanced parental leave.
- 1 month paid sabbatical after 4 years.
- Regular socials and activities, online and in‑person.
- OpenAI subscription paid.
- Online mental health support via Spill.
- Workplace nursery scheme.
- And many more!
We Encourage You to Apply
We strongly encourage applications from people of colour, the LGBTQ+ community, people with disabilities, neuro‑divergent 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.
UK App Access
The Cleo app is no longer downloadable in the UK (temporarily). Existing users retain access, but some features will be unavailable for a short period. We are focusing on the US market to provide the most value, and will apply learnings to support UK users in the future.
Senior Engineers - Polyglots | UK (hybrid + remote) in London employer: cleo
Contact Detail:
cleo Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Engineers - Polyglots | UK (hybrid + remote) in London
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech industry, especially those who work at Cleo or similar companies. A friendly chat can lead to valuable insights and even referrals that could get your foot in the door.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your projects, especially those that highlight your problem-solving abilities and diverse tech stack experience. This is your chance to demonstrate how you think and approach challenges.
✨Tip Number 3
Prepare for the interview by understanding Cleo's mission and values. Think about how your background aligns with their goal of improving financial health for everyone. Be ready to discuss how you can contribute to their culture of collaboration and positive impact.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen. Plus, it shows you’re genuinely interested in joining the team and making a difference at Cleo.
We think you need these skills to ace Senior Engineers - Polyglots | UK (hybrid + remote) in London
Some tips for your application 🫡
Show Your Passion: When you're writing your application, let your enthusiasm for building products that genuinely help people shine through. We want to see how you align with our mission to change humanity's relationship with money!
Highlight Your Experience: Don’t just list your technical skills; share specific examples of meaningful product work you've shipped. Whether it's in Ruby or another stack, we care more about your thought process and problem-solving abilities.
Be Yourself: We value authenticity! Use your own voice in your application. Let us know who you are beyond your technical skills—your curiosity, collaboration style, and how you contribute to a positive engineering culture.
Apply Through Our Website: Make sure to apply through our website for the best chance of getting noticed. It’s the easiest way for us to keep track of your application and ensure it gets into the right hands!
How to prepare for a job interview at cleo
✨Know Your Tech Stack
Familiarise yourself with Cleo's tech stack, especially Ruby on Rails, React Native, and PostgreSQL. Even if you haven't worked with Ruby before, understanding the principles behind these technologies will help you engage in meaningful conversations during the interview.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific examples of how you've tackled complex engineering challenges in your previous roles. Highlight your thought process, the trade-offs you considered, and how your solutions positively impacted users or the product.
✨Emphasise Collaboration
Cleo values teamwork, so be ready to share experiences where you've successfully collaborated with cross-functional teams. Discuss how you’ve worked with designers, analysts, and product partners to deliver impactful features that improve user experience.
✨Demonstrate Curiosity and Willingness to Learn
Cleo is looking for engineers who are curious and eager to learn. Prepare to discuss how you've approached learning new technologies or methodologies in the past, and express your enthusiasm for continuous improvement and mentorship within the team.