FullStack .NET Developer

We are looking for a FullStack .NET Developer to join our team.

What you'll do:

• Develop and maintain NATO-owned training and exercise applications as part of the CTX team.

• Build and enhance full-stack web applications using .NET technologies and modern front-end frameworks.

• Contribute to the design, development, and maintenance of APIs and web interfaces in a secure DevSecOps environment.

• Work on project-provided hardware within a classified NATO working environment (NSF-based setup).

• Participate in Agile development cycles, collaborating closely with cross-functional teams.

• Implement, maintain, and improve automated unit tests to ensure software quality and reliability.

• Support continuous integration and delivery practices using modern DevSecOps approaches.

• Collaborate with team members using version control systems and structured development workflows.

• Contribute to the evolution of training and exercise platforms used across NATO operations.

What you will need to bring:

• Strong experience (minimum 3 years) in developing and testing applications using .NET, C#, HTML, CSS, Angular, and TypeScript.

• Solid experience building APIs in an Agile DevSecOps environment.

• Hands-on experience implementing and maintaining unit tests.

• Strong knowledge of modern web application development, preferably using Angular and ASP.NET Core.

• Excellent understanding of HTML5, CSS, and responsive web design principles.

• Proficiency in using Git or other version control systems in collaborative team environments.

• Strong teamwork and communication skills, with experience working in Agile software development teams.

• Fluency in English (speaking and writing).

• Ability to work in a structured, security-sensitive environment with high standards of delivery.

• Holds, or is eligible to obtain, a national security clearance as a citizen of a NATO member state.

• Availability to work on-site in the Netherlands.

What can Syone offer:

• Integration in an organization with profound and sustained growth and involvement in pioneering projects with innovative technological solutions;

• Strong IT training plans;

• Professional evolution with intervention in ambitious technological projects, both national and internationally.

By applying, you accept our GDPR policies. Your personal data in your CV and documents will be used solely for processing your application at SYONE. SYONE, S.A. (NIPC 504729624) is the data controller, located at Rua Alfredo da Silva, 8-A, Edifício Stern, Piso 3D, 2610-016 Amadora. We will use your data to tailor your application to relevant vacancies and for potential employment contracts. If selected, your data will be kept during your employment and for at least two years after. If not selected, your data will be kept for two years for future vacancies and then deleted, except for your contact details. You can exercise your rights (access, rectification, erasure, etc.) by emailing data.privacy@syone.com. Your data may be shared with our HR service providers and will be stored securely. You can withdraw your consent at any time. We will not use your data for other purposes without your express consent. For more information, email data.privacy@syone.com.