Full-Stack Software Engineer (.Net & JavaScript)

About 3P:

3P is a software specialist serving the public sector. As a fast-growing company, 3P has quickly distinguished itself by offering a comprehensive range of solutions specifically tailored to the needs of public sector organizations

We’re looking for a Full-Stack Software Engineer who can balance strong technical craftsmanship with architectural thinking, and who’s eager to shape the core foundation of our next-generation products.

You’ll be at the heart of the transformation — designing, developing, and delivering code that moves the mission forward every day.

What you'll do:

• Design and build core features of our new web platform from the ground up.
• Collaborate with backend, frontend, DevOps, and QA teams to deliver seamless migration of features and data.
• Translate complex business logic from the client application into clean, efficient, scalable web architecture.
• Work with product managers and UX designers to create elegant, intuitive interfaces.
• Contribute to technical architecture discussions, and help define standards, tools, and frameworks.
• Ensure code quality, performance, and security across the stack.
• Mentor junior developers and contribute to a culture of technical excellence.
• Experiment, optimize, and continuously push for improvement in both product and process.

• 5+ years of experience in full-stack software development.
• Deep proficiency in modern JavaScript frameworks (React, Vue, or Angular) and backend technologies (.NET & Node.js).
• Experience in API design, microservices, and REST or GraphQL architectures.
• Solid understanding of cloud environments (AWS, Azure, or GCP) and DevOps practices (CI/CD, containers, etc.).
• A strong sense of ownership, attention to detail, and pride in building high-performing systems.
• Excellent collaboration skills — able to work closely with designers, PMs, and fellow engineers.
• You enjoy working in cross-functional teams and are willing to come to our office in Kontich at least one to two days per week.
• Your native language is Dutch or French, and you are also highly proficient in English.

Nice to have:

• Experience in migration projects or legacy modernization.
• Background in data modeling and database optimization (SQL/NoSQL).
• Familiarity with TypeScript.
• Interest in performance optimization and front-end architecture.
• You’ve built something end-to-end — from prototype to production.

What we offer

At 3P, you become part of a fast-growing technology company that leverages its expertise to serve the public sector through impactful solutions. Here, your work truly matters: it directly contributes to modernizing and improving public services.

You will work in a dynamic and supportive environment where initiative, autonomy, and team spirit are genuinely encouraged. We value ideas, ownership, and collaboration across teams (product, technology, consulting, sales, etc.).

We offer you:
• A strategic and impactful role within a rapidly growing company
• Real opportunities for professional development
• A strong team culture based on collaboration, trust, and knowledge sharing
• A challenging position with significant freedom and responsibility
• An attractive salary aligned with your profile and experience
• A company car or mobility budget
• Full equipment (laptop, smartphone)
• A remote work allowance and flexible working conditions depending on your role
• Comprehensive social benefits (hospitalization insurance, pension plan, etc.)
• Additional fringe benefits (meal vouchers, eco vouchers, etc.)
• Numerous team events and team-building activities to strengthen connections in a friendly atmosphere