Harsh Rai

About Harsh Rai

At Tricon Infotech, I contribute to building scalable microservice backends tailored to…

Experience

1. Java Software Engineer

   Tricon Infotech

   Nov 2023 — Present

   Building scalable microservice backends for healthcare and EdTech domains using Java, Spring Boot, and AWS.Project 1: Healthcare Doctor Appointment Platform→ Prevented double-booking under concurrent load using optimistic locking — ~98% booking accuracy→ Implemented Saga orchestration pattern for reliable cross-service booking & payment transactions→ Reduced API response time by 25% via Redis caching and MySQL query/index optimization→ Built Kafka-driven async notification pipeline for Email, SMS, and WhatsApp alerts→ Integrated Stripe payment gateway for secure appointment payments→ Secured APIs with Spring Security, JWT, and OAuth2; centralized routing via API Gateway→ Applied Resilience4J circuit breaker and retry patterns for fault tolerance→ Deployed on AWS (EC2, RDS, S3) using Docker and Jenkins CI/CD pipelinesProject 2: Course Evaluation & Learning Management Platform→ Built enrollment, purchase, and progress-tracking backend with Spring MVC, Hibernate, and JPA→ Enforced 85% course completion gate before stage advancement→ Developed MCQ and theoretical assessment module with payment-activation logic→ Prevented duplicate enrollments via transaction management→ Wrote JUnit and Mockito unit/integration tests; optimized DB queries and indexingTech: Java · Spring Boot · Apache Kafka · MySQL · Redis · Spring Security · JWT · OAuth2 · Eureka · Feign Client · Resilience4J · Docker · Kubernetes · AWS · Jenkins