Frontend Engineer in London

About Pleo

Messy spend management is tricky business. At Pleo, we're changing that. We build spend solutions that make managing money seamless, empowering, and surprisingly effective for finance teams and employees alike - with a vision to help all businesses ‘go beyond’. The word ‘Pleo’ actually means ‘more than you’d expect’, and living by that mantra has been the secret to our success over the last 10 years.

Now, we’re at a pivotal moment in our journey; every move we make has a direct impact on our 40,000+ customers, our business, and our collective success. We need people who take pride in uncovering customer needs, who turn complex problems into simple solutions, challenge the way things are done (respectfully), and always aim high. With great ambitions driving us forward, we can’t say we’ve got this whole thing figured out. And frankly, that’s half the fun! What we can say is that we’re a driven, progressive, and, importantly, a kind bunch of 850+ people from over 100 nationalities, all committed to delivering the future of business spending, together.

About the role

We're looking for a Frontend Software Engineer to join our Control Mechanism team at Pleo. Control Mechanism sits at the heart of how Pleo manages spend control. We build the tools that monitor employee expenses, reviewers approve them, finance teams enforce limits, and admins configure the rules that govern it all. It's a high-stakes domain where correctness matters: the logic is complex, the edge cases are real, and the impact of getting it right is felt directly by our customers.

In this role, you'll work primarily on frontend surfaces across our web and mobile products, but you'll be most effective if you're genuinely curious about the systems underneath them. Our work involves as much investigation and business logic reasoning as it does UI building, and the engineers who thrive here are the ones who want to understand why the data looks the way it does, not just how to display it.

What you’ll be doing

• Build and maintain features across web and mobile surfaces for expense review, approval workflows, and spend controls.
• Investigate and debug complex issues involving business logic, permissions, and data across multiple services.
• Collaborate with backend engineers, product managers, and designers to deliver features end-to-end.
• Contribute to technical decisions and help shape how we evolve our architecture, including ongoing work migrating from our legacy monolith to newer microservices.
• Partner with other Pleo teams whose features and services live within our domain.

What you bring

• Solid experience with frontend development, ideally with React and React Native for mobile development.
• A genuine curiosity for how systems work end-to-end.
• Full-stack experience, or alternatively a sound understanding of backend services, APIs, and data flows.
• Strong investigation skills: comfortable digging into unfamiliar code, reasoning about data models, and forming hypotheses about what's broken and why.
• Business and product awareness: the ability to understand not just the technical specification but what the customer is actually trying to accomplish.
• A methodical approach to testing and shipping.
• Good communication skills and the ability to work with both technical and non-technical stakeholders.
• A background in fintech or complex permissions systems is a plus.

Who you’ll be working with and reporting to

You’ll report to our Senior Engineering Manager for the Spend Controls area. The Control Mechanism team has 6 engineers with a range of strengths across frontend, backend, and full-stack development.

How you’ll develop in this role

• Build a deep understanding of Pleo's spend management product.
• Take ownership of frontend features end-to-end.
• Grow your full-stack fluency with the support of experienced engineers.
• Begin contributing to architectural decisions as we continue evolving our infrastructure.

We’re committed to helping you develop your career, whether that means taking on bigger projects, stepping into leadership, or acquiring new skills in other areas.

Please note: We are unable to offer visa sponsorship for this role in any of the listed locations.

Your own Pleo card (no more out-of-pocket spending!)

Lunch is on us for your work days - enjoy catered meals or receive a lunch allowance based on your local office.

Comprehensive private healthcare - depending on your location, coverage options include Vitality, Alan or Médis.

We offer 25 days of holiday + your public holidays.

For our Team, we offer both hybrid and fully remote working options.

We use MyndUp to give our employees access to free mental health and well-being support.

Paid parental leave - we want to make sure that we're supportive of families.

About your application

English first. Since it's our company language, please submit your application in English.

A fair look for everyone. Our talent team reads every single application to ensure the process is fair.

Diversity drives us. We encourage people from all backgrounds and experiences to join us.

Interview at your best. We want you to feel comfortable throughout the process.

Your data is safe. When you apply, we process your personal data as a data processor.

Applying for multiple roles? Nothing is stopping you, and we assess every role independently.

Reapplying. If you’re applying for the same role again, please wait six months from your last decision before hitting submit.