Khushal Tajne

I build secure, transactional Java applications with Spring Boot, Spring Security, PostgreSQL, and MySQL. My project work focuses on clean layered architecture, REST APIs, authentication, and reliable data handling.

I developed 20+ REST APIs for a Personal Goal & Task Monitoring System, improving response handling by 30% through query optimization and pagination. I implemented JWT authentication, refresh tokens, role-based access control, protected React routes, and user-level data isolation.

I also built enterprise-style banking APIs for deposits, withdrawals, and fund transfers, using transactional isolation controls to prevent concurrent double-spend conditions. For an e-commerce application, I created Admin and Customer modules, real-time inventory management, and optimized SQL queries to reduce average page-load time by 50%.

During my frontend internship at PHN Technology, I built responsive web pages with HTML, CSS, and JavaScript, testing them across browsers and devices. I'm actively strengthening my data structures and algorithms skills alongside hands-on full-stack project work.