Chandan Howale

Java Developer Trainee

0-1 years of experience

About

MCA graduate (2025) with hands-on experience in backend development using Spring Boot, REST APIs, MySQL, Redis, and AWS (EC2, RDS). Worked on PayPal payment integration, OAuth 2.0, and microservices during internship. Actively exploring AI tooling and certified in Anthropic Claude courses. Open to backend developer roles and eager to build scalable, production-ready systems.

Skills

Java
Spring Boot
Spring Boot JDBC
Spring Security
Microservices
Circuite Breaker
Eureka Service Registry
REST APIs
JSON
Swagger/OpenAPI
Postman
cURL
MySQL
Git
GitHub
Bitbucket
Sourcetree
Maven
Redis
Tomcat
AWS
AWS EC2
AWS RDS
AWS Secrets Manager
AWS ElasticCache
JUnit
Mockito
Code Coverage
SonarQube
SLF4J
Logback
Micrometer
Eclipse
DBeaver
MobaXterm
Jira
Agile
Scrum
Jackson
Lombok
Docker
Kubernetes

Experience

Java Developer Trainee
HulkHire Tech · Oct 2025 - Nov 2025
• Performed in-depth technical analysis of PayPal Standard Checkout Order API and collaboratively finalizedthe integration approach.• Developed paypal-provider-service integrating with PayPal REST APIs: Create Order & Capture Order.• Designed and implemented payment status tracking with 100% accuracy in lifecycle transitions.• Secured API communication using OAuth 2.0 (Client Credentials grant), Basic Auth & Access Token.• Built a robust error handling system with custom error codes and centralized exception handling in SpringBoot.• Implemented microservices with circuit breaker for fault tolerance and integrated distributed logging usingMicrometer.• Used Spring JDBC with MySQL for efficient data access and transaction persistence.• Implemented Redis cache for OAuth access token management, reducing token fetch latency by ~65% onsubsequent API calls.• Applied design patterns like Factory and Builder to ensure modular and scalable system architecture.• Deployed services on AWS EC2 with RDS, AWS Secrets Manager, and implemented Redis caching using AWSElastiCache for PayPal OAuth token management.• Wrote unit tests with JUnit & Mockito, maintaining high code coverage and reliability.• Followed Agile Scrum methodology throughout the development lifecycle.

Education

master · MCA · University of Mumbai · 205