Senior Fullstack Engineer

Confirmed live in the last 24 hours

Pleo

Madrid, Spain, London, United Kingdom, Copenhagen, Denmark

On-site

Posted March 9, 2026

Job Description

Messy spend management is tricky business. And tedious processes are a lose-lose situation for all involved, not just finance. 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 Senior Software Engineer to join our Demo Experience Platform team at Pleo. In this role, you will enable multiple internal customers & stakeholders to experience, test and showcase Pleo through our demo and sandbox environments, and will be part of Pleo’s Platform organization. If you're excited about improving our sales demo experience and increasing our sales conversion rate, making our product development process easier, or enabling our internal partners to integrate by becoming a solid API ecosystem player, then this is the opportunity for you!

You will report to our Senior Engineering Manager and work closely with teams across multiple departments, especially Go-to-market, to ensure success. Our team of four (including you) is highly collaborative and dedicated to improving and enabling the demoability of Pleo.

What you’ll be doing

As a Senior Software Engineer in our Demo experience team, you will:

Lead initiatives to design, build, and maintain innovative solutions to drive efficiency across multiple departments.
Collaborate with cross-functional teams to identify opportunities for improvement in demo, sandbox, and test accounts experience.
Participate in code reviews, post-mortems, and provide mentorship to other engineers.
Proactively address technical debt and guide the team through technical challenges and migrations.
Contribute to the execution, delivery, and quality of projects within the team.

To put things into context, a big item on the roadmap for the team is focusing on improving the platform architecture to further enable self-service capabilities and reduce operational tasks.

What you bring

You’ll thrive in this role if you have:

Expertise in JVM-based server-side languages (ideally Kotlin)
Some experience or eagerness to be working with Node.js and frontend technologies such as React and TypeScript
Experience with distributed systems, microservices, and cloud environments (e.g., AWS, Kubernetes).
Proficiency with relational databases like PostgreSQL, testing frameworks (e.g., JUnit, Testcontainers), and observability tools like Grafana.
A proven ability to design and develop APIs.
Strong problem-solving skills and a collaborative mindset to mentor and upskill your teammates.
A proven ability to lead large projects, manage ambiguity, and maintain high standards for code quality and reliability.
A proven ability to work autonomously and collaborate with non-technical stakeholders.

Why is this role a good fit for you

This role is a good fit for you if:

You love having end-to-end ownership of software engineering.
You’re keen to develop your leadership skills.
You are impact driven and enjoy collaborating with internal users & stakeholders.
You're keen to work across the full stack, with some proven strengths on backend development.

This role is not a good fit for you if: