Senior Full Stack Developer

Senior Full Stack Developer - 16 months - Belgium At RELYzIT, we don't recruit — we build. We unite exceptional builders: engineers, architects, creators, across the BENELUX and the GCC. Vetted through VECTOR7™'s multi-signal evaluation, you evaluate once and carry that credential forever. This is more than work. This is where builders build the future. Intro Step into a role where your expertise shapes the future of water technology. RELYzIT Talent is seeking a Senior Full Stack Developer for a high-impact, freelance assignment with our client in Belgium. Join a mission-driven team building innovative web applications that connect people, water, and technology—delivering real-world impact across cities, municipalities, and the broader water sector. Why This Role Matters Water is life—and technology is the bridge. As a Senior Full Stack Developer, you’ll be at the forefront of digital transformation in the water sector, driving solutions that enhance sustainability, efficiency, and connectivity. Your work will empower communities, support energy transition, and enable smarter water management. This is your opportunity to solve complex challenges and leave a lasting mark on the environment and society. What You’ll Be Doing • Designing, developing, and deploying robust web applications on Azure Kubernetes (AKS), ensuring scalability and reliability. • Collaborating with cross-functional product teams to deliver customer-focused solutions for cities, municipalities, and contractors. • Building and evolving shared IT-for-IT applications within a central Build Factory, supporting multiple product teams. • Driving technical innovation by designing test frameworks, supporting AI evolution roadmaps, and exploring new technologies through proof-of-concepts (POCs). • Organizing and optimizing data spaces in the water sector, including GIS data integration and management. • Championing Agile methodologies to deliver high-quality, iterative solutions in a collaborative environment. • Ensuring seamless integration and evolution of microservices, APIs, and cloud-native architectures. • Contributing to the rollout of technical advancements across all teams, fostering a culture of continuous improvement. • Working partially on-site (2-3 days per week) to maximize collaboration and project success. What We’re Looking For • Builder mindset: You take ownership, thrive on solving complex problems, and are driven by impact. • Proven experience as a Senior Full Stack Developer, with a strong track record in delivering enterprise-grade solutions. • Ability to work autonomously and collaboratively, adapting quickly to evolving project needs. • Excellent communication skills, with a focus on clarity, transparency, and teamwork. • Commitment to quality, innovation, and continuous learning. Technical Skills • Java (Expert, version 17 or 21) • Angular (Expert) • Artificial Intelligence (AI) (Expert) • Spring, Spring Boot (Advanced) • Hibernate (Advanced) • RESTful API (Advanced) • JUnit (Advanced) • Maven (Advanced) • HTML5 (Advanced) • GIT (Advanced) • Agile methodologies (Advanced) • Azure (Intermediate) • Azure DevOps (Intermediate) • Azure Kubernetes Service - AKS (Intermediate) • Docker (Intermediate) • Data Architecture (Intermediate) • GIS and GIS data types (Intermediate) • MS SQL Server (Intermediate) • Node.js (Intermediate) • OAuth (Intermediate) • Open API (Intermediate) • Microservices (Intermediate) • Spring Batch (Intermediate) • UX Design & Research (Intermediate) • Reactive Programming, ReactiveX - RxJs (Beginner) Language Proficiency • Professional proficiency in English is required. • Knowledge of Dutch or French is a plus. Other Requirements • Freelance position with a project duration of 16 months, based in Belgium (partial on-site presence required). • Only applications meeting all specified skills, experience, language, and availability criteria will be considered. • Familiarity with Agile/Scrum frameworks is essential. • Applicants must review and accept all project documentation as part of the onboarding process. Ready to build the future with RELYzIT Talent? Upload your CV now and join a community where elite builders drive real impact.