We are looking for a Fullstack Java Developer with knowledge of Vaadin for our client! RESPONSIBILITIES Perform regular system updates, patches, and maintenance to ensure optimal performance and security Troubleshoot and resolve technical issues promptly to minimize downtime and disruptions Design, develop, and implement new features and functionalities for internal systems to meet evolving operational needs Propose innovative solutions and improvements to enhance system performance, usability and efficiency Assist in planning, scheduling, and tracking development tasks to meet project deadlines Collaborate with other team members and cross-functional teams strengthen the unification of the approach to internal test systems development and maintenance. REQUIREMENTS At least 4 years of professional experience in Java development Proficiency and deep understanding of Java frameworks (Vaadin, Spring Boot) with a proven track of projects Experience with RESTful API development and integration (e.g., Spring MVC, RESTful web services) Experience in writing unit tests and integration tests (e.g., JUnit) Proficiency with Git version control and experience with CI/CD pipelines Team orientation, project management, and good communication skills Creativity, analytical skills, and ability to efficiently set priorities Knowledge of English allowing to work with technical documents. WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract and rate: 130-150  PLN/hour  100% remote work  The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client Events and integration meetings, as well as participation in various initiatives, e.g., sports Access to the benefits offering (medical care, life insurance, Multisport card).  WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE?Application: Apply and submit your CV.After the application review, the recruiter will contact selected candidates by phone.Screening: Have a conversation with a speedapp recruiter about your experience.Next steps: The speedapp recruiter will explain the recruitment process for the specific position.The speedapp recruiter will stay in touch with you throughout the entire process.ABOUT SPEEDAPPAt speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them.👉 10 years of experience👉 +100 clients worldwide +300 hires per year💎 We have won the prestigious 'Forbes Diamonds' award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch.DO YOU HAVE ANY QUESTIONS?Contact the recruiter responsible for this process directly.Karolina KizowskaSenior IT Delivery [email protected]+48 608 487 448