The FOCUS platform supports administrative and operational processing of police case handling (assignments, file building, follow-up, reporting, and integrations with internal and external systems). The system is business-critical and developed according to modern engineering principles within an Agile setup. The client is looking for a

Senior Full Stack Developer

• with strong ownership mindset — someone who safeguards quality, architectural consistency, and technical maturity within the team. ### Requirements -
• Develop backend services using Node.js (TypeScript-first approach).
• - Build performant and maintainable frontends in React.
• - Work with PostgreSQL in production environments.
• - Contribute to architecture decisions focusing on scalability and security.
• - Implement test automation and safeguard code quality.
• - Work in an Agile/Scrum team.
• - Contribute to improvement of ways-of-working.
• - Coach and guide fellow developers.
• - Take ownership of technical standards and development practices within the platform.

Must Have

• Minimum 5 years experience in development of web-based applications.
• Strong backend development experience with Node.js.
• Experience with TypeScript and JavaScript in production environments.
• Strong frontend experience with React.
• Experience with PostgreSQL and relational databases.
• Dutch language proficiency – CEFR C2.
• Willingness to sign NDA and IT Code of Conduct.

Should Have

• -
• Experience leading or coaching development teams.
• - Strong coding, testing and debugging capabilities.
• - Experience with Agile/Scrum methodology.
• - Experience with cloud platforms (AWS and/or Azure).
• - Experience with Docker and containerisation.
• - Experience with CI/CD pipelines and test automation.
• - Experience taking a leading role in Agile development environments.