Abhinav Singh Kushwah

Migrated legacy monolithic system to microservices architecture for improved scalability.

Designed and developed new REST APIs while enhancing existing legacy APIs for integration.

• Built end-to-end Ship Group Service microservice to streamline booking creation process.
• Implemented Spring Batch job to synchronize data between new microservices database and legacy monolith.
• Added new fields and integrated rule mining logic into legacy system.
• Ensured data consistency, backward compatibility, and optimized performance throughout migration.

Designed APIs to retrieve voyage details (CVN) efficiently.

• Implemented asynchronous Feign clients for seamless external API integration.
• Integrated Resilience4j features, including Circuit Breaker and Rate Limiter, to enhance reliability.
• Optimized system performance through read replica database utilization.
• Achieved over 90% unit test coverage utilizing JUnit 5.
• Monitored systems with Elastic and Dynatrace for effective production support.

Developed and enhanced REST APIs integrated with Amazon AuroraDB for secure data storage.

• Built end-to-end GraphQL-based Beneficiaries Service using Spring Boot.
• Modernized Restrictions APIs to boost performance and scalability.
• Secured APIs through OAuth2 and role-based access control mechanisms.
• Achieved over 95% unit test coverage utilizing JUnit and Mockito.
• Monitored production systems employing Grafana, Splunk, and Honeycomb tools.
• Conducted root cause analysis for production incidents to identify solutions.
• Facilitated knowledge transfer sessions for onboarding new team members.

Designed and developed REST APIs for Patient, Prescription, and Order modules.

• Implemented Kafka-based Order API V2 for real-time order updates.
• Built CRUD APIs for Patient Attribute module with input validation and global exception handling.
• Developed Kafka producers and consumers to manage order lifecycle events.
• Optimized API performance and scalability, including pagination and filtering.
• Utilized Java 8 streams and lambda expressions for efficient business logic implementation.
• Wrote unit test cases to maintain high code quality.
• Resolved production defects and managed L2/L3 support tickets.