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 organizationsWe’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 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 organizationsWe’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.