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Roushan User

@roushanuser1

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Java backend developer building real-time blood donor matching with Spring Boot, Redis Geo, and RabbitMQ.

India

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I developed a real-time blood donation and emergency matching platform using Java and Spring Boot, with Redis GeoSpatial indexing for distance calculations and RabbitMQ for asynchronous notifications. I also secured its REST APIs with JWT and role-based access control, and used pessimistic locking to address race conditions during donor pledges.

For ContactSphere, I developed a secure contact management platform with OAuth2 integration and Redis caching. I also built an AI-powered contact auto-fill feature using Spring AI and Google Gemini, and containerized the blood donation platform with Docker and Docker Compose.

Experience

Work history, roles, and key accomplishments

Current

Real-Time Blood Donation Platform

Current

Personal Project

May 2026 - Present (5 months)

Developed a real-time blood donor matching platform with asynchronous notifications and interactive map-based geolocation. Integrated Redis GeoSpatial indexing, JWT security, RabbitMQ, and WebSockets.

Java Spring Boot Spring Security MySQL Redis RabbitMQ WebSockets Docker

ContactSphere – Contact Management Platform

Personal Project

Feb 2026 - Mar 2026 (1 month)

Developed a secure contact management application with OAuth2 integration, Redis caching, and AI-powered auto-fill using Spring AI and Google Gemini.

Java Spring Boot Spring Security MySQL Cloudinary Spring AI Resilience4j

CPU Scheduling Algorithm Simulator

Personal Project

Sep 2025 - Sep 2025 (0 months)

Developed a CPU Scheduling Simulator in C++ implementing FCFS, SJF, Priority, and Round Robin algorithms. Leveraged STL containers to simulate process execution and compute scheduling metrics.

C++STL Algorithms