Java Backend Developer

Requirements:

• Bachelor (Master is a plus) in computer science, CCE (or related fields)
• 3+ years of professional experience in Java development, with at least 3 years of experience working with Spring Boot.
• Strong knowledge of Java 8/11+ features such as lambdas, streams, and functional programming.
• Experience in building RESTful APIs and microservices architecture using Spring Boot.
• Strong understanding of Spring framework components (Spring MVC, Spring Security, Spring Data, etc.)
• Experience with relational databases (MySQL, PostgreSQL, etc.) and ORM frameworks like Hibernate/JPA
• Hands-on experience with caching strategies using Redis.
• Experience with message brokers such as RabbitMQ, Apache Kafka, or ActiveMQ
• Deep understanding of prompt engineering techniques and context window management for backend-driven AI applications (e.g., structuring system prompts, dynamic context retrieval, or RAG workflows).
• Hands-on experience with containerization and orchestration technologies (e.g., Docker, Kubernetes)
• Familiarity with DevOps tools (CI/CD pipelines, Jenkins, GitLab, etc.) and version control systems like Git
• Solid understanding of security practices, including OAuth2, JWT, encryption, and secure API design
• Proficiency in writing unit tests and integration tests using JUnit, Mockito, or similar frameworks
• Strong problem-solving skills, analytical thinking, and debugging capabilities
• Excellent communication skills and the ability to work both independently and as part of a team
• Applicants must have legal authorization to work in Cyprus (e.g., valid EU work authorization) at the time of application; employer sponsorship is not available for this role

Responsibilities

• Design, develop, and maintain backend services and RESTful APIs using Java and Spring Boot framework
• Collaborate with cross-functional teams, including front-end developers, product managers, and sysadmin to deliver complete and efficient solutions
• Ensure high performance and availability of applications by optimizing and troubleshooting performance bottlenecks
• Mentor junior developers and provide technical guidance to the team, ensuring best coding practices and standards
• Perform code reviews to ensure code quality, security, and adherence to best practices
• Integrate third-party services and external APIs, ensuring data security and integrity
• Write unit and integration tests to ensure code stability and functionality
• Maintain documentation for the design, development, and deployment processes
• Stay up to date with emerging technologies and incorporate them where applicable to improve the product’s overall performance and maintainability
• Monitor application performance and troubleshoot complex production issues to ensure uptime and reliability
• Ensure security best practices are implemented across the application, including but not limited to authentication, authorization, and data protection