Santosh Kumar User

I am a Java backend developer with over 4 years of experience building and maintaining scalable, high-performance backend systems for the insurance and logistics domains. I focus on clean, modular designs following SOLID principles and design patterns, delivering reliable RESTful APIs and microservices.

I have strong hands-on experience with Core Java, Spring Boot, Hibernate, Kafka, MySQL, MongoDB and AWS services such as Lambda, S3 and EC2, and I apply testing practices using JUnit 5 and Mockito to ensure code quality. My recent projects include insurance claim management and shipment-tracking systems where I improved operational efficiency and automated key workflows.

I collaborate effectively across teams, integrate third-party APIs, and use tools like Git, Docker, Maven/Gradle, Postman and Jira to deliver end-to-end solutions that reduce manual processing and increase system reliability.