We’re seeking a hands‑on API Developer to join our API Team in Valencia, Spain, working within the Labs Domain or another internal domain depending on the assignment. Reporting to the Platform Engineering Manager or equivalent, the role follows a hybrid working model aligned with the needs of the team. You’ll turn product goals into robust technical solutions, craft high‑quality .NET APIs, champion API‑first practices, and collaborate closely with Product Owners, Architects, Security, and Platform teams to deliver reliable, scalable services.

Location
Parque Tecnológico, Paterna, Valencia, Spain

Your Mission
Your mission will be to develop and take ownership of the API surface supporting the domain’s applications, enabling the team to deliver efficiently, safely, and sustainably. You will balance the need for rapid delivery with the long‑term health, scalability, and maintainability of the APIs.

What You’ll Do

Design and evolve the API architecture; define contracts, versioning, security, and observability

Break down features into technical tasks and actionable work





Implement REST and/or gRPC APIs; ensure thorough testing (unit, integration, contract)

Lead or contribute to sprint planning and technical refinement

Maintain DevOps pipelines, CI/CD, monitoring, and operational readiness

Collaborate with Platform, Security, and Enterprise Architecture teams

Mentor peers and raise the technical bar across the team

Identify and mitigate technical risks, dependencies, and debt

Support incident resolution and root cause analysis

What You Bring

Strong hands‑on experience as a .NET API developer

Proven expertise designing, building, and consuming APIs (REST and/or gRPC)

Deep knowledge of API tooling: OpenAPI/Swagger, contract testing, API gateways, security best practices

Cloud experience with Azure or AWS

Experience with DevOps, CI/CD, automated testing, and observability

Strong collaboration and communication skills; able to work with DPO/EA/security team

📌 API Developer –.NET (Madrid)
🏢 Vitrolife Group
📍 Madrid