At Experis, a ManpowerGroup company, we specialise in recruiting the best tech talent and matching them with all kinds of organisations, from large corporations to start-ups.
We are a company specialising in IT consultancy and the recruitment of professionals in the technology sector across our three practice areas: Business Transformation, Cloud & Infrastructure, and Enterprise Applications.
We have a workforce of over 1,800 IT specialists in Spain and an international presence in 54 countries.
If you're a technology professional, we'd love to help you find that new opportunity you're looking for - the one that will help you take the next step in your career.
Find your next opportunity with us. Take your career to the next level with Experis.
About the role
A small, experienced group of engineers, a designer and a founding team that stays close to the product. Engineers own features end to end, work closely with design, and have a direct line to the decisions that matter. We use Claude Team Enterprise as a core part of how we work and expect everyone on the team to do the same.



We are a lean team of senior full-stack engineers, and this role sits at the top of that group as the person we rely on when something is hard, ambiguous, or nobody else has the context. This is a hands-on role, roughly 90% coding. We are not looking for a pure architect or someone who wants to direct from a distance. We are looking for someone who is deep in the codebase every day, ships features themselves, and makes pragmatic calls that move the product forward. You will also help shape technical direction, work directly with our founders to turn product ideas into scoped, shippable work, and raise the bar for the whole team.
What you will own
End-to-end feature delivery across the whole stack: Next.js frontend, Node.js backend, PostgreSQL, and deployment.
Our real-time analytics dashboard, which gives merchants a single view of ad performance across every channel and platform.
Our UI com

📌 Principal FullStack Engineer (Madrid)
🏢 Experis España
📍 Madrid