API Developer - .NET Customer Success (.NET)

Location: Hybrid role based in Valencia, Spain, or Gothenburg, Sweden

Company

hirify.global develops medical devices, genetic services, and personalized genetic information products for fertility treatment and IVF clinics.

What you will do

• Design and evolve API architecture, including contracts, versioning, security, and observability.
• Build and maintain high-quality .NET REST and/or gRPC APIs supporting domain applications.
• Break down features into technical tasks and contribute to sprint planning and technical refinement.
• Implement unit, integration, and contract testing while maintaining DevOps pipelines, CI/CD, monitoring, and operational readiness.
• Collaborate with Product Owners, Platform, Security, and Enterprise Architecture teams.
• Mentor peers, manage 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, modern architectures, and API-centric products in agile teams.
• Strong collaboration and communication skills, including the ability to work with DPO, Enterprise Architecture, and Security teams.
• Awareness of security, privacy, and audit considerations in API data.
• Ability to collaborate with Enterprise Architecture on standards.

Nice to have

• Experience with interoperability standards or cross-domain integrations.
• Regulatory or compliance exposure.
• Enterprise SaaS experience.
• Experience with Docker, Kubernetes, observability tooling, or APM solutions.

Culture & Benefits

• Work on products supporting laboratory operations, fertility treatment, and patient outcomes.
• Hybrid working model with flexible working hours.
• Private health insurance.
• Clear ownership and influence over technical decisions and ways of working.
• International collaboration with Product Owners, Architects, Security, and Platform teams.
• Culture focused on engineering quality, innovation, collaboration, and sustainable development.

Hiring process

• Applications are reviewed on an ongoing basis; early submission is encouraged.