1. System Architecture Design and Optimization Design and continuously optimize scalable, maintainable, and high-availability systems based on the Java technology stack, aligned with business growth needs. 2. Technology Selection and Solution Design Lead the selection of core technologies and formulate feasible, high-quality technical solutions, including microservices, middleware, and enterprise-level architecture. 3. Microservices and Distributed Systems Build and maintain microservices architecture using frameworks like Spring Cloud or Apache Dubbo, promoting service decoupling, modularization, and scalability. 4. High Concurrency and Performance Tuning Demonstrate strong expertise in JVM tuning, multithreading, and concurrent programming; conduct in-depth analysis and optimization for large-scale, high-concurrency systems. 5. Code Quality and Technical Review Establish coding standards and enforce best practices; participate in code and architecture reviews to ensure high-quality and maintainable codebases. 6. Technical Problem Solving Take ownership of solving complex technical issues such as distributed transactions, cache consistency, and message reliability in production environments. 7. Middleware and Infrastructure Support Provide deep technical understanding and implementation guidance for commonly used middleware such as Redis, Kafka, MySQL, MongoDB, Elasticsearch, and RabbitMQ. 8. Team Technical Leadership and Mentorship Guide and mentor junior and mid-level developers; organize technical training and knowledge sharing to improve overall team capabilities. 9. Research and Innovation Keep up with trends in the Java ecosystem (e.g., Spring Boot 3.x, containerization, Kubernetes, Serverless), and evaluate their potential application in real-world business scenarios.