Building, improving, and maintaining our platform
At Twizzit, we’re on a mission to help clubs, organisations, and communities run smoother, grow faster, and shine brighter. Based across Antwerp, Utrecht and Assen, we offer hybrid working to support a healthy work/life balance.
The Full Stack Developer is one of the brains behind Twizzit — turning ideas, user needs, and “wouldn’t it be cool if…” moments into real, working features. They build, improve, and maintain the platform from front to back, making sure everything runs smoothly, quickly, and beautifully. When something breaks, they fix it; when something can be better, they make it better; when something new is needed, they create it.
As our new Full Stack Developer, you’ll play a key role in shaping the product that thousands of users rely on every day. If you love crafting clean UI, writing elegant code, and turning ideas into real, working features — you’ll feel right at home here.
Key Responsibilities
Feature development — Building new functionalities that improve the Twizzit experience for clubs and users.
Platform maintenance — Keeping the system stable, fast, and reliable across all environments.
Bug fixing — Investigating issues, solving them efficiently, and preventing them from returning.
Code collaboration — Working closely with other developers, designers, and teams to deliver high‑quality releases.
Technical optimisation — Improving performance, security, and scalability to support Twizzit’s growth.
Bachelor’s degree in Computer Science or equivalent experience
3–5 years of full‑stack development experience
Strong proficiency in PHP + Symfony and Doctrine ORM
Proven experience with React, HTML, JavaScript, and CSS
Comfortable with UI frameworks and component‑based development
Solid understanding of Git, Agile/Scrum
Experience building and consuming APIs
Experience with SQL Server, MySQL, or PostgreSQL
Comfortable supporting customer service teams on a shared rota
Knowledge of MongoDB
Experience with Docker and containerisation
Familiarity with microservices and state management libraries like Redux
Experience with unit testing (front‑end and back‑end)
Interest in software innovation and continuous improvement
