We are looking for a skilled and experienced **Lead Java Developer** to join our team. In this role, you will work on cutting\-edge projects, delivering high\-quality software solutions while collaborating with multidisciplinary teams. You will take a key role in designing, implementing, and maintaining backend systems that support critical business objectives. **Please note that working from the customer's office is required 2\-3 days per week.** **Responsibilities** * Work alongside developers, architects, and stakeholders to design and deliver software solutions * Build and maintain backend microservices using Java and Spring frameworks * Write efficient, maintainable, and well\-documented code that meets project specifications * Design and implement REST APIs to enable seamless communication and system integration * Develop unit tests to maintain high standards of code quality and reliability * Identify and resolve software issues by analyzing root causes and implementing fixes * Contribute to system architecture discussions and collaborate on design strategies * Keep up with the latest technologies and industry trends to improve development approaches * Guide and mentor junior developers, ensuring adherence to industry best practices **Requirements** * Bachelor's or Master's degree in Computer Science, Information Technology, or a related field * Minimum of 5 years of experience in software development * At least one year of experience in leading and managing development teams * Proficiency in developing microservices using Java and Spring frameworks, such as Spring Boot * Strong expertise in building and managing Java microservice infrastructures * Solid understanding of REST APIs and their implementation in distributed systems * Experience in writing unit tests to ensure consistent code quality * Strong analytical and problem\-solving skills for addressing technical challenges * Ability to collaborate effectively in technical discussions and brainstorming sessions * Advanced English communication skills, both written and spoken, at a B2 level or higher **Nice to have** * Knowledge of client\-server architectures and their practical applications * Familiarity with low\-level protocols and their role in software development * Understanding of threads and event\-driven architectures * Experience with authentication methods and security protocols * Background in cryptography concepts and their use in software systems