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 Senior Full-Stack Developer 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

Requirements

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

Benefits

You will join an ambitious, fast-growing company with a young corporate culture and an incredibly enjoyable working environment.

3P has a long-standing tradition of attracting only top-tier talent in order to deliver impeccable service to its demanding clients.

In return, 3P offers you an exciting role with a high degree of autonomy, a permanent full-time contract, and an attractive above-market salary package including a company car, laptop, mobile phone, group insurance, pension plan, meal vouchers, hospitalization insurance, numerous team-building activities, and more.

If you love solving complex technical problems, crafting elegant solutions, and working on products that matter — we'd love to meet you!

3P - België / Belgique

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