An excellent Java developer possesses extensive knowledge of software development principles, rules, and practices. They professionally work with web applications and write functional and concise code leading to app development. In addition, professional Java developers should possess critical thinking and problem-solving skills that help them discover all the bottlenecks in app development, avoid roadblocks and provide fast logical solutions. Besides, good Java developers have UI/UX proficiency helping them to evaluate their products from the user’s point of view.