API Developer – .NET Customer Success (Valencia)

Location: Hybrid role at Parque Tecnológico, Paterna, Valencia, Spain

Company

Provides medical devices, genetic services, and science-based products supporting fertility treatment and clinical practice.

What you will do

• Design and evolve API architecture, including contracts, versioning, security, and observability.
• Implement REST and/or gRPC APIs with unit, integration, and contract testing.
• Break down features into technical tasks and contribute to sprint planning and technical refinement.
• Maintain DevOps pipelines, CI/CD, monitoring, and operational readiness.
• Collaborate with Product Owners, Platform, Security, and Enterprise Architecture teams.
• Mentor peers, mitigate technical risks and debt, and support incident resolution and root cause analysis.

Requirements

• Strong hands-on experience as a .NET API developer and a strong background as a senior engineer or API specialist.
• Proven expertise designing, building, and consuming REST and/or gRPC APIs.
• Deep knowledge of OpenAPI/Swagger, contract testing, API gateways, and API security best practices.
• Cloud experience with Azure or AWS.
• Experience with DevOps, CI/CD, automated testing, observability, and modern architectures.
• Experience delivering API-centric products in agile teams.
• Strong collaboration and communication skills, including work with DPO, Enterprise Architecture, and Security teams.
• Awareness of security, privacy, and audit considerations in API data.

Nice to have

• Experience with interoperability standards or cross-domain integrations.
• Regulatory or compliance exposure.
• Enterprise SaaS experience.
• Containerization and orchestration with Docker or Kubernetes.
• Observability tooling and APM solutions.
• Spanish language skills.

Culture & Benefits

• Hybrid working model with flexible working hours.
• Private health insurance.
• Ownership of technical decisions and ways of working within a strategically important engineering organization.
• International collaboration with Product Owners, Architects, Security, and Platform teams.
• Work on medical and laboratory products with direct impact on business and patient outcomes.

Hiring process

• The interview process will be conducted in English.
• Applications are reviewed on an ongoing basis.