Company Description

Yoink is a sustainability-focused technology company founded in 2019, built on the belief that long-term, responsible growth is more valuable than quick wins. The team combines craftsmanship, innovation, and a strong culture of knowledge sharing to create meaningful, enduring solutions. Yoink’s developers are rooted in the Java ecosystem, regularly engaging with global tech communities and conferences to stay current and contribute to open source projects. Collaboration, continuous learning, and pride in high-quality work are central to how Yoink operates and partners with clients. The company leverages open source software to deliver flexible, modern solutions while actively giving back to the community.

Role Description

As a Senior Java/Kotlin Software Engineer at Yoink, you will design, build, and maintain scalable backend services and microservices for client projects. You will work closely with other engineers, architects, and stakeholders to translate business needs into robust technical solutions, primarily within the Java ecosystem and related frameworks. Daily tasks include writing clean, testable code, conducting code reviews, improving system performance, and contributing to technical design and architectural decisions. You will also mentor less experienced engineers, share knowledge within the team, and participate in internal and external tech communities. This is a full-time, hybrid role based in Utrecht, with a balance of on-site collaboration and the flexibility to work from home part of the week.

Qualifications

Strong skills in Software Development and Programming, with a focus on backend systems
Hands-on experience with Java and familiarity or interest in Kotlin
Proficiency in designing and implementing Microservices architectures
Practical experience with Spring Framework and related tools in the Java ecosystem
Solid understanding of APIs, RESTful services, and integration patterns
Experience with CI/CD pipelines, automated testing, and version control (e.g., Git)
Knowledge of containerization and cloud platforms (e.g., Docker, Kubernetes, AWS, GCP, or Azure) is beneficial
Comfort working in a consultancy environment, collaborating directly with clients and cross-functional teams
Ability to communicate clearly, share knowledge, and mentor peers in a supportive, inclusive way
Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience
Interest in sustainability, open source contribution, and continuous professional development

Senior Java kotlin Software Engineer

Job description