1. Solid foundation in core Java technologies, with in-depth understanding of the JVM memory model, concurrent programming, and the Collections framework.

2. Proficient in applying design patterns, with strong system architecture design and code refactoring skills.

3. Thorough understanding of multithreaded programming, familiar with thread pool principles and application scenarios, capable of resolving real-world concurrency issues.

4. Expertise in the Spring Cloud microservices ecosystem, with hands-on experience in core components such as OpenFeign, Ribbon, and Hystrix.

5. Experience in microservices architecture design, including service decomposition, service governance, and distributed transaction management.

6. Familiar with microservices core mechanisms such as service registration and discovery, configuration centers, and gateway routing.

7. In-depth knowledge of MySQL architecture, with expertise in index optimization, transaction isolation levels, and locking mechanisms.

8. Practical experience in SQL performance tuning for production environments, capable of systematically analyzing slow queries and devising optimization strategies.

9. Proficient in Redis use cases, with mastery of cache consistency solutions.

10. Familiarity with the core principles and clustering mechanisms of messaging middleware such as RocketMQ, RabbitMQ, and Kafka.

11. Ability to address production issues such as message loss, duplicate consumption (ensuring idempotency), and message ordering.

Bonus Qualifications:

1. Experience in tgbot project development, familiar with relevant APIs and workflows.

2. Experience in P2P project development.

3. Experience in openapi project development, with knowledge of mainstream rate-limiting algorithms.

4. Based overseas or in Taiwan.