Senior Java Engineer - remote, within EU

Our client is a leading supplier of software products in the field of eCustoms internationally. The company supplies software products and IT services to European Union Institutions and Agencies, international organisations and national government administrations. The company employs over 1100 engineers, IT experts and consultants (around 3% PhD, 41% MSc and 54% BSc or equivalent). The group’s staff is multilingual and multinational with in-depth experience in the delivery of services to the government sector worldwide. Currently we are looking for a Senior Java Engineer to join the team as a long-term Contractor (B2B) / Freelancer. Craft Cutting-Edge Applications: Develop powerful, efficient back-end web applications that drive our business forward. Architect & Build: Design and implement core business logic, creating high-performance servers and databases. Enhance Security & Performance: Ensure our systems are secure, reliable, and optimized across multiple platforms. API Development: Design and develop APIs that enable seamless communication between systems. Collaborate on Scalable Solutions: Work alongside other developers to create scalable software solutions. Lead Projects: Take charge of key projects, guiding them from concept to completion. Maintain & Improve Code Quality: Keep our codebase organized and pristine while fixing bugs and enhancing functionality. Troubleshoot & Optimize: Analyze data, processes, and code to identify areas for improvement and troubleshoot issues. Write Documentation: Contribute to creating clear technical documentation for current and future reference. A university degree in IT Expertise in IT: min 9 years of professional experience in development. Proven Back-End Skills: Mastery of back-end languages and frameworks, including Java 8+ , Spring , Spring Boot , Java EE , and Hibernate . Database Proficiency: Solid experience with Oracle Service Bus , Oracle DB , and RDBMS database technology. Integration Experience: Deep understanding of OpenID Connect , SSO , and integration techniques. Cloud Enthusiast: Hands-on experience with Amazon Web Services (AWS) for cloud development. Message Queues & APIs: Expertise in Kafka , ActiveMQ , JMS , and working with REST & SOAP APIs . Blockchain Knowledge: Familiarity with blockchain technologies is a big plus! Identity & Access Management: Experience with tools like Secunda and IOP IAM . Domain Expertise: Advanced knowledge of Procurement and Grant Management business domains. Server & Web Configuration: Strong understanding of Oracle WebLogic Server , Apache , SSL/TLS , and reverse proxy configuration. CI/CD & DevOps: Practical experience with CI/CD pipelines and tools like Bamboo and Docker . Version Control: Knowledge of Git for code versioning. Bonus Skills: Experience with NoSQL databases , Angular , TypeScript , and front-end technologies is a plus. Language Proficiency: Fluent in English, with proficiency in French being a great advantage. Excellent remuneration Fully remote Long-term possible