Senior Full Stack Java Developer - Freelance

<h3>Opportunity</h3> <span><strong>Join ILIAS Solutions</strong> and contribute to making <strong>mission-critical products for the defense industry.</strong> We are seeking an experienced <strong>Senior Full Stack Java Developer</strong> to join our Data Platform team within the Defense Capability Management unit. </span><br/><br/><span>In this role,<strong> you will work autonomously to design secure, reliable, and scalable applications</strong> that support vital operations. If you are a strong communicator ready to apply your skills in Java and Spring Boot to high-stakes challenges, we want to meet you.</span> <h3>Your mission</h3> <strong>Key Responsibilities:</strong><ul><li>Design, develop, and maintain full-stack applications using Java and Spring Boot</li><li>Write clean, maintainable, and well-tested code</li><li>Work with relational databases (<strong>PostgreSQL, Oracle DB, SQL Server</strong>) to design schemas, write queries, and ensure data integrity</li><li>Integrate and manage<strong> object storage systems (MinIO)</strong></li><li>Collaborate with data teams on <strong>Apache Spark</strong> and <strong>Python </strong>based integrations</li><li>Participate in code reviews, technical discussions, and architectural decisions• Ensure applications are secure, reliable, and scalable</li><li>Contribute to team knowledge sharing</li><li>Troubleshoot and resolve complex technical issues across the full stack</li></ul> <h3>Your capabilities</h3> <h3><strong><span>Required Technical Skills</span></strong></h3><h4><span><strong>Backend Development</strong></span></h4><ul><li><strong>Java</strong> – Advanced proficiency with modern Java</li><li><strong>Spring Boot</strong> – Extensive experience building RESTful APIs</li><li><strong>Database Management</strong> – Strong SQL skills with hands-on experience in:<ul><li>PostgreSQL</li><li>Oracle Database</li><li>SQL Server</li></ul></li><li><strong>Object Storage</strong> – Experience with MinIO or similar S3-compatible storage solutions</li></ul><h4><span><strong>Frontend Development</strong></span></h4><ul><li>Solid foundation in <strong>HTML, CSS, JavaScript, JSP, and Thymeleaf</strong></li><li>React experience is a plus</li></ul><h4><span><strong>Data Processing &amp; Analytics</strong></span></h4><ul><li>Experience with distributed data processing using <strong>Apache Spark</strong></li><li>Python experience is a plus</li></ul><h4><span><strong>Additional Technical Requirements</strong></span></h4><ul><li>RESTful API design and implementation</li><li>Version control systems (Git)</li><li>Build tools (Maven)</li><li>Container technologies (Docker preferred)</li><li>Testing frameworks (JUnit, etc.)</li></ul><h3><span><strong>Required Experience &amp; Qualifications</strong></span></h3><ul><li>Bachelor’s degree in Computer Science, Software Engineering, or equivalent experience</li><li><strong>5+ years</strong> of professional software development experience</li><li>Proven experience with <strong>Java</strong> and <strong>Spring Boot</strong></li><li>Proven experience working with <strong>multiple database systems</strong></li><li>Experience with both <strong>SQL and NoSQL</strong> databases</li><li>Strong understanding of the software development lifecycle and agile methodologies</li></ul><h3><span><strong>Personal Attributes</strong></span></h3><ul><li><strong>Independent Worker</strong> – Able to take ownership of projects and work with minimal supervision</li><li><strong>Team Player</strong> – Collaborative mindset with excellent communication skills</li><li><strong>Problem Solver</strong> – Strong analytical and troubleshooting capabilities</li><li><strong>Adaptable</strong> – Comfortable working with diverse technologies and evolving requirements</li><li><strong>Quality-Focused</strong> – Writes clean, maintainable, well-documented code</li><li><strong>Continuous Learner</strong> – Passionate about staying current with technology trends and best practices</li></ul> <h3>Land @ILIAS</h3> <p>Exited and <strong>ready </strong>to explore how you could fit in? <br/>Apply directly or reach out to  <a href="mailto:youness.kaissi@ilias-solutions.com">youness.kaissi@ilias-solutions.com</a> for any questions.<br/>we are thrilled to get to know you!</p>