Event-driven architectureHigh concurrency and scalability patternsStrong knowledge of:System trade-offs (consistency vs availability, latency vs throughput)API design and service boundariesFault tolerance and resilience designExperience with system decomposition and domain modellingStrong experience with Spring Boot / Spring CloudDeep understanding of RESTful APIs and microservicesExperience with ORM frameworks (Hibernate, JPA)FrontendStrong hands-on experience with at least one: React / Vue / AngularSolid understanding of frontend architecture and state managementAbility to contribute to frontend system design (not just coding)Data & InfrastructureStrong experience with relational databases (Oracle / SQL Server / PostgreSQL)Experience with: Redis or distributed caching, Message queues (Kafka / RabbitMQ)Familiar with: Docker, Kubernetes, CI/CD and automated deployment pipelines #J-18808-Ljbffr