Growth Marketing Engineer

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 $200 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.

Follow us on LinkedIn to keep up to date with new product features and insights from the team.

What you’ll be doing

We’re looking for a React Web Engineer who’s excited to apply their frontend expertise within a high-impact Growth squad. You’ll work in a cross-functional team, collaborating with marketers, designers, data analysts and UX writers, to grow our reach and help improve the financial health of our users.

This role is a great fit if you're a strong React developer ready to level up as a full stack engineer. You’ll be learning and working with Ruby on Rails alongside experienced engineers, expanding your backend skills.

• Own and enhance technical touchpoints for marketing attribution across multiple platforms (e.g. Facebook, TikTok, Google, Rakuten, AppsFlyer, customer.io).
• Collaboratively working with Marketing and Data teams to set up efficient attribution pipelines, allowing for fast testing & iteration.
• Working closely with our SEO Lead, optimise our website for SEO to improve search engine rankings for highly competitive keywords and drive highly motivated new users to the site.
• Making informed delivery decisions based upon the overview of data being sent to / ingested from 3rd parties.
• Getting involved in cross-cutting concerns that lift our entire engineering effort with the rest of the frontend chapter.
• Taking part in shaping the work your squad does, not just the technical parts. Delivery is a team sport, and we encourage everyone at Cleo to share their ideas, so you can expect to be involved in product ideation sessions, user research calls, design reviews, retrospectives, ways of working sessions, product demos, OKR reviews.

Here are some examples, big and small, of the kinds of work our Growth squad have taken part in over the last year:

• Integration with a new affiliate 3rd party provider, looping back in-app event data for accurate measurements
• To ensure we can monitor conversion rates, adding support for new ad platforms on our web and landing pages so they attribute correctly through to app install and sign up
• Working with Data and Marketing to run ROAS optimisation tests with various 3rd parties.

Within our Growth squad, you will be iterating and delivering quickly to help us gain greater insight into our users' needs and seeing your work having a material impact on the financial health of those most in need.

About you

• You are a doer and have a proactive attitude to solving problems. You are keen to learn new things and pick things up quickly.
• You’re experienced working closely with marketing teams.
• You are self-driven; finding a balance between Making it Happen in the present and identifying best practice for future Growth Engineers to join and build upon your foundations.
• You will be the second Growth Engineer so you will have the opportunity to build and grow the future of Growth Engineering at Cleo.
• You’ve read our company values and engineering principles which drive our ways of working and help us deliver working software to our users, learn what works and iterate quickly to improve it. You share and embrace these opinions and are passionate about using them to deliver value.

Our Tech Stack

• Stack: Ruby on Rails monolith, React Native with TypeScript frontend, Python for ML, PostgreSQL on AWS.
• Website Stack: NextJS, Dato CMS, Talwind CSS, Vercel for deployment
• Deployments: CI/CD via CircleCI and Heroku; backend deploys on every merge; weekly app releases to iOS/Android.
• Quality: Peer-reviewed code, automated tests with Minitest, strong emphasis on quality and pragmatism.
• Architecture: Moving toward modular design—monolith with microservice benefits through progressive refactoring.
• Culture: Engineers drive technical strategy; everyone is an owner and every voice counts.

Why should I apply?

• Clear engineering career growth framework. Whether you want to develop your career as a sole contributor or head down the engineering management track, you can grow with us!
• You’ll be joining an open and collaborative team where you’ll be heard and get to make a difference.
• You’ll be joining a chapter of respected frontend engineers.
• Work where you work best … We’re a globally distributed team. If you live in London, we’d love you to spend one day a week 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.
• Work when you work best … we have flexible hours to enable you to work at your best.

What do you get for all your hard work?

• A competitive compensation package (base + equity) with bi-annual reviews, aligned to our quarterly OKR planning cycles. You can view our public progression framework and salary bandings here: https://cleo-ai.progressionapp.com/
• 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;
• Company-wide performance reviews every 6 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, and life assurance
• Enhanced parental leave
• 1 month paid sabbatical after 4 years at Cleo
• Regular socials and activities, online and in-person
• We'll pay for your OpenAI subscription
• 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.

UK App access: The Cleo app is no longer downloadable in the UK (but only until next year). If you’re an existing user, you’ll still have access to the app. But some features won’t be available (just for a little while). Why? 99% of our users are based in the US – where financial health is often overlooked. We’ve decided to shift our focus to where we can provide the most value and make the greatest impact for users who need it most. Then we’ll be able to apply what we learn to better support our UK users in the future.