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Staff Backend Engineer

Hybrid in Spain·Full-time·Added 1 month ago (last checked 21 Oct)

Cleo

6 open roles

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Our summary

Work mode: Hybrid, Spain
Contract: Full-time
Experience: Senior level

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Skills

Requirements

What we're looking for

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)

Pay & benefits

What you'll get

We offer benefits package built to support you in and out of work. Benefits vary by country 🌍 and include meaningful equity, comprehensive health, dental and vision insurance, mental health support, a paid one-month sabbatical after four years, a learning and development platform, pension or retirement contributions, and location-specific leave entitlements.

For the full breakdown on what's available in your location, visit our Candidate Hub 👈

The role

Most money apps talk at you. Cleo talks back ✨

We're not building another finance app. We're building the world's first AI financial assistant, one that actually understands your money and makes you better at it, and we're changing the world's relationship with money in the process 💰 For everyone, whatever their background or balance.

The proof: profitable, fast-growing, a unicorn with over $300M in ARR, and millions of people who now feel differently about their money.

We love original thinkers who challenge the status quo. We move fast, tell the truth, and there's nowhere to hide from good work here. If that excites you more than it scares you, you'll fit right in.

We're hiring a Staff Backend Engineer for our Financial Assistant Pillar. You'll shape technical direction and drive delivery across multiple functional product squads.

What you'll do

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 Cleo

Cleo is a London-based fintech company that offers an AI-powered personal finance assistant. Through its app, Cleo helps users manage their money, track spending, and build better financial habits using a conversational interface. The company has grown significantly since its founding, serving millions of users primarily in the UK and US, and is recognized as a notable player in the digital financial wellness space.

Cleo has a strong presence in London, where its global headquarters is located, and it also has a growing team in Spain, particularly in Barcelona, to support its engineering and product development efforts. The company is known for its inclusive and remote-friendly culture, making it an attractive option for international professionals looking to work in a dynamic fintech environment. With a focus on innovation and user experience, Cleo offers opportunities for engineers, data scientists, and product managers to make a real impact on how people interact with their finances.

Industry: Fintech
Founded: 2016
Employees: 100–500
Headquarters: London, UK
In Spain: Barcelona

Good to know if you are moving

Cleo has a remote-friendly culture, with a distributed team across Europe, making it easier for international hires to work from Spain.
The company offers a competitive benefits package, including equity, health insurance, and a learning budget.
Cleo's engineering and product teams are based in London and Barcelona, providing opportunities for international professionals to work in a multicultural environment.
The company is known for its strong focus on employee well-being and work-life balance.

In their own words

About the company & team

Here at Cleo, we have ~200 Engineers organised into Pillars. ✨ Our stack spans a Ruby on Rails monolith, a single React Native (TypeScript) app frontend, Python for machine learning services, and PostgreSQL, all hosted on AWS and shipped through Kubernetes - backend goes out multiple times a week, app releases to Google and Apple at least weekly. To thrive here, our engineers proactively use our Engineering Principles to guide daily decisions, take ownership of problems beyond their own squad to drive broader impact, and actively drive their own learning, development, and growth.

Additional information

Cleo's mission is to change the world's relationship with money. We can't do that without building a brilliant, genuinely diverse team - and making sure our hiring process gives everyone a fair shot, running a fair and transparent recruitment process in which every candidate is considered on their metris.

We're glad to make reasonable adjustments at any stage of the process. If there's anything we can do to support you in showing us your best, please let your recruiter or one of the team know.

We may use AI-assisted tools during the recruitment process to take support the team in different ways like taking notes or referring back to conversations. They do not replace the team and all applications are reviewed by a Cleo employee thoroughly!

All open roles at Cleo