.Net Developer

• 09 September 2026
• 100%
• Indefinite duration
• 1, 1010 Lausanne
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Why choose API?

API, with more than 30 years of experience, is a family company, recognized for its real IT expertise; digital transformation, support service, Cloud...

We have known how to surround ourselves with the best experts in order to best meet the specific needs of our clients.

By opting for API, you choose a human-sized company benefiting from solid IT know-how.

We are proud of our unique corporate culture because we offer professional development opportunities, with continuous training programs, career evolution as well as rigorous follow-up.

We put humans at the heart of our activities: after all, our computers can solve problems, but they still don't know how to make a good coffee!

.Net Developer

Today, we are looking for a Full Stack .Net / React Developer to join our client's team in Lausanne.

Your role:

• Design, develop and maintain modern web applications in React and back-end services in C# / .NET Core.
• Develop and integrate robust, secure and highly available REST APIs.
• Deploy, administer and operate solutions on the Microsoft Azure ecosystem (App Services, Azure Functions, Azure SQL, Event Grid / Service Bus).
• Containerize applications with Docker and participate in deployments in containerized environments and CI/CD pipelines.
• Evolve towards the mobile ecosystem: increase skills, with the support of the team, in the maintenance and evolution of mobile applications (iOS / Android).
• Ensure software stability, code quality and test coverage (automated tests, code reviews, Security by Design principles).
• Interact regularly with business stakeholders and the product team to understand needs, popularize technical aspects and deliver continuous value.

Profile sought:

• Engineering degree in computer science (EPF, HES, Master or equivalent training).
• At least five years of experience in Full Stack software development, with established expertise either on the Back-end side (.NET Core), or on the Front-end side (React).
• Solid mastery of the main technical foundation:
• Back side: C# / .NET Core, REST APIs, relational databases (SQL) or NoSQL (MongoDB).
• Front side: React, TypeScript / JavaScript (experience with another modern framework like Angular with a willingness to adapt is welcome).
• Good understanding of containerization with Docker and CI/CD flows; notions of Kubernetes (AKS) and the Azure ecosystem are appreciated.
• Interest in the mobile world: having already a first approach or being motivated to increase skills in Kotlin or Swift thanks to internal support.
• Excellent interpersonal skills: team spirit, clarity of expression, ability to popularize to business departments and familiarity with Agile methods (Scrum).
• Fluent French mandatory on a daily basis and a good level of English (B2) required