java senior dev (m/v)

About the role As a Senior Java Developer, you will contribute to dependable, scalable software that plays a direct part in the quality and continuity of digital services. You will work on complex backend solutions, help shape technical decisions, and support the team in delivering resilient systems. This role combines hands-on development with senior input in collaboration, quality, and technical direction. In this part-time position, you will have an impact on architecture, performance, and maintainability while also helping other developers develop their skills. ## What we offer - A salary indication that matches seniority and part-time availability; competitive employment conditions - A flexible part-time workweek of 32 hours - Room for professional growth and knowledge sharing - A challenging environment with complex technical questions - Competitive benefits package ## Responsibilities - Develop and maintain backend functionality in Java with an emphasis on scalability

and reliability - Translate functional requirements into technical solutions and safeguard technical quality - Improve the performance, security, and maintainability of existing applications - Work closely with product, QA, and other developers to deliver solutions on time and with care - Review colleagues’ code and coach team members on best practices - Identify technical risks and actively contribute to architecture decisions ## Requirements - At least 5 years of experience as a Java Developer or in a similar backend role - Strong knowledge of Java and common backend principles - Experience with REST APIs, data modelling, and relational databases - Familiarity with software testing, code reviews, and CI/CD practices - Good command of the Dutch language, both spoken and written - HBO or WO level of thinking, preferably in computer science or a comparable field ## Nice to have - Experience with Spring Boot - Knowledge of cloud environments such as AWS, Azure, or GCP - Experience with microservices architectures - Knowledge of containerisation with Docker or Kubernetes - Experience in an Agile/Scrum environment