We are the Intelligent Internet Platform. We connect People, Places and Things anywhere, managing Internet Performance better than anyone else while providing One Global Experience, giving Visibility, Control and Security through expereoOne.
Expereo believes in the power of Internet connectivity. As the world's largest provider of managed internet, SD-WAN/SASE, and Cloud connectivity solutions, we power enterprises and government sites worldwide, helping to enhance every business' productivity with adaptable and optimal Internet performance.
As a trusted partner of Fortune 500 enterprises, our continued aim and success in helping our customers and partners depends solely on the talented individuals who make Expereo a dynamic, effective, multicultural, and equitable environment.
About the role
We are looking for a Backend Developer to join the Supplier onboarding and Quote Management teams and work directly on the computational core of our platform.
You will write Python and/or dotnet every day. You will work on an existing Python/C# backend and create new services.



You will work on solving real-world business problems, like creating a constraint optimization engine, working on integrations with our partners and creating and maintaining internal tools.
The core of the role sits at the intersection of three things:
Algorithmic implementation — translating complex commercial requirements into deterministic, auditable logic. You will implement and maintain the optimization engine that drives our quote generation.
API design and contract maintenance — defining clear contracts between services, and ensuring the interface is clean, versioned, and reliable for downstream consumers.
Code quality and engineering discipline — making code production-ready and scalable: writing tests, applying engineering standards, and ensuring the codebase can grow with the platform.
You will work directly with the innovation and commercial teams.
This role is also designed with growth in mind.

📌 Senior Backend Developer (Barcelona)
🏢 Expereo
📍 Barcelona