Ajay Kumar

About Ajay Kumar

I\'ve spent 6+ years building systems that banks, insurers, and investment platforms run…

Experience

1. Java Full Stack Developer

   Vanguard

   Aug 2024 — Present

   Worked in an Agile team to enhance an investment portal through sprint planning, backlog grooming, and regular retrospectives. Designed and developed scalable Microservices using Spring Boot, following SOA principles for modular and independently deployable services.Built RESTful APIs using Spring annotations, service layers, and repository interfaces to streamline backend logic and ensure high performance. Created responsive, dynamic UIs using Angular 5, HTML, CSS, JavaScript, and Bootstrap, delivering seamless cross-platform user experiences.Integrated Angular with REST APIs for secure, stateless communication and real-time data rendering. Implemented Hibernate ORM to map Java entities to Oracle DB tables, using HQL and criteria queries for complex data handling. Leveraged JSON for efficient frontend-backend data exchange.Deployed Spring Cloud API Gateway for centralized routing, authentication, and load balancing. Secured backend APIs using OAuth2 with token-based authentication and fine-grained access control. Automated UI testing with Protractor and Cucumber to ensure functional and accessible interfaces.Built unit and integration tests with JUnit and Mockito, improving reliability and code coverage. Worked with MongoDB for unstructured data storage and personalization features. Used Apache Kafka for real-time trade event streaming, enabling fault-tolerant, decoupled communication.Automated CI/CD pipelines using Jenkins, integrated testing and code analysis, and deployed applications to AWS services including EC2, S3, and RDS.

Education

• Lewis University

  Master's degree