Implemented web applications, Developed REST APIs, Developed Front-end & Back-end components, Developed Front-end user interface with React (useState, useEffect), implemented databases (e.g. Postgres), Implemented and authorised logging security with Bcrypt architecture, Implemented persisted web pages with Passport.js, and Cookies technologies, Implemented Java microservices, Security Interceptors and JWT Token Generators, Optimized database queries in MongoDB and MySQL, improving application performance by 20%, Implemented user authentication with JWT and role-based access control. Designed and implemented responsive landing pages with HTML, CSS, and JavaScript, and chieving 95% cross-browser compatibility.