At HulkHire Tech, I contributed to payment-validation, processing, and PayPal-provider microservices using Java and Spring Boot. I developed a modular validation framework, secured APIs with HMAC-SHA256, and integrated PayPal REST APIs for creating and capturing orders.
I also built a Spring Boot e-commerce REST API with JWT-based authentication, role-based access control, and product search. In a separate project, I built MailChat, a real-time messaging app using React, Node.js, Express.js, and Socket.IO.
