Design, develop, and maintain enterprise-grade backend applications using Java 8/11/17/21+
Build scalable microservices using Spring Boot, Spring Cloud, Spring MVC
Develop robust RESTful APIs and GraphQL APIs following industry best practices
Design and implement microservices architecture with proper service decomposition, API Gateway, Service Registry, Circuit Breaker patterns
Implement Spring Cloud components — Eureka, Zuul/Spring Cloud Gateway, Config Server, Ribbon, Hystrix/Resilience4j, Sleuth, Zipkin
Write clean, modular, and well-documented code following SOLID principles, Design Patterns, and Clean Code practices
Implement event-driven architecture using Apache Kafka, RabbitMQ, ActiveMQ, AWS SQS/SNS
Design and optimize database schemas for both SQL (PostgreSQL, MySQL, Oracle, SQL Server) and NoSQL (MongoDB, Cassandra, DynamoDB, Redis) databases
Implement ORM using Hibernate, JPA (Java Persistence API), Spring Data JPA, MyBatis
Build and maintain batch processing jobs using Spring Batch
Implement caching strategies using Redis, Ehcache, Hazelcast, Caffeine Cache for performance optimization
Design and implement authentication & authorization — Spring Security, JWT, OAuth 2.0, SSO, LDAP, Keycloak, SAML, Role-Based Access Control (RBAC)
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