Java Technology Stack Job Support
Java enterprise development is not just one technology — it is an entire ecosystem of frameworks, messaging systems, cloud platforms, and architectural patterns. Our Java technology stack job support covers everything from core Java 21 to cloud-native microservices running on Kubernetes.
Spring Ecosystem Deep Dive
Spring Boot & Spring Framework
- Auto-configuration, conditional beans, custom starters
- Spring MVC vs. WebFlux (reactive) — when and why
- Spring Security – method-level security, OAuth2 resource server, CSRF handling
- Spring Data – repositories, specifications, projections, auditing
- Spring Batch – job configuration, partitioning, retry/skip logic
Spring Cloud
- Service discovery with Netflix Eureka or Consul
- API Gateway (Spring Cloud Gateway) – route predicates, filters, rate limiting
- Config Server – Git-backed configuration, encryption, profile-specific properties
- Circuit breaker with Resilience4j – bulkhead, retry, time limiter
- Distributed tracing with Micrometer and Zipkin / Jaeger
Messaging & Streaming
Apache Kafka
- Topic design – partition count, replication factor
- Producer tuning – acks, batch size, linger.ms, compression
- Consumer groups – offset management, rebalancing, lag monitoring
- Kafka Streams – stateless vs. stateful processing, KTable joins
- Schema Registry with Avro / Protobuf
RabbitMQ
- Exchange types – direct, topic, fanout, headers
- Dead letter queues and retry policies
- Spring AMQP listener containers
Java Performance & Diagnostics
- JVM internals – GC algorithms (G1, ZGC, Shenandoah), heap analysis with VisualVM / JFR
- Thread dump analysis – deadlock detection, thread pool exhaustion
- Memory leak identification with heap dumps (Eclipse MAT)
- Async programming with CompletableFuture and reactive streams (Project Reactor)
Enterprise Patterns
- Domain-Driven Design – aggregates, repositories, domain events
- CQRS + Event Sourcing with Axon Framework
- Saga pattern for distributed transactions
- Hexagonal (ports and adapters) architecture