Java Fundamentals: Solid understanding of Java programming, including proficiency in object-oriented programming (OOP) and concurrent programming.
Distributed Systems Theory: Knowledge of the principles, concepts, and design patterns of distributed systems. Familiarity with concepts like CAP theorem, consistent hashing, and distributed transactions.
Microservices Architecture: In-depth understanding of microservices architecture, covering aspects such as service decomposition, API design, service registration and discovery, and containerization.
Spring and Spring Boot: Mastery of the Spring framework and Spring Boot for simplifying development, implementing dependency injection, handling transactions, and building RESTful APIs.
Distributed Storage: Familiarity with distributed storage systems such as Redis, MongoDB, Cassandra, understanding their features, usage, and performance optimization.
Message Queues: Experience with message middleware concepts and usage, e.g., Apache Kafka, RabbitMQ, for achieving asynchronous communication and decoupling system components.
Database Knowledge: Proficiency in both relational databases (e.g., MySQL, PostgreSQL) and NoSQL databases (e.g., MongoDB, Cassandra) and their usage and optimization.
RESTful and RPC: Understanding and ability to implement service communication based on RESTful and RPC principles, such as using HTTP/JSON or gRPC.
Containerization and Orchestration: Proficiency in Docker container technology and container orchestration tools like Kubernetes for achieving portability and scalability.
Security: Security awareness, familiarity with common network security and data protection methods, and the ability to implement authentication, authorization, and encryption.
Performance Tuning: Ability to identify and address performance bottlenecks in distributed systems, performing system tuning and optimization.
Monitoring and Logging: Understanding and usage of monitoring tools and logging systems, such as Prometheus, Grafana, ELK Stack, for real-time monitoring and troubleshooting.
Version Control: Proficient use of version control tools like Git for collaborative development and code management.
Continuous Integration and Continuous Delivery (CI/CD): Understanding of CI/CD processes, ability to configure and manage automated build, test, and deployment pipelines.