DevOps Engineer - Contractor

Responsibilities

• Design and develop backend architecture for business systems, ensuring high availability, high performance, and scalability.
• Perform service governance and performance tuning in high-concurrency scenarios to continuously improve system stability, throughput, and response efficiency.
• Develop core services and business modules, including user systems, authentication, authorization, and open API capabilities.
• Participate in microservices architecture design and implementation, promoting system modularization, service-orientation, and engineering excellence.
• Troubleshoot production issues, analyze performance, and resolve complex technical problems.
• Collaborate with product, frontend, QA, and cross-functional teams to ensure high-quality delivery of requirements.
• Continuously optimize development processes, code quality, and technical solutions to improve maintainability and R&D efficiency.

Qualifications

• Bachelor's degree or above in Computer Science or a related field.
• 3-5+ years of Java backend development experience with a solid technical foundation. Outstanding fresh graduates may also be considered.
• Proficiency in Java core technologies, with a deep understanding of JVM, concurrency programming, collection frameworks, I/O, and network communication.
• Familiarity with mainstream frameworks like Spring Boot and Spring Cloud, with experience in microservices development and governance.
• Experience in developing high-performance, high-concurrency systems, with familiarity in caching, asynchronous processing, rate limiting, circuit breaking, and thread pools.
• Proficiency in common middleware such as MySQL, Redis, Kafka, and Elasticsearch, with an understanding of their use cases and performance optimization methods.
• Understanding of common distributed system issues and solutions, including idempotency, consistency, distributed locks, transaction processing, and service fault tolerance.
• Strong analytical and problem-solving skills, capable of independently troubleshooting production issues and resolving complex problems.
• Familiarity with authentication and authorization mechanisms, with experience designing and developing with OAuth2, JWT, SSO, RBAC, and Session.
• Experience with Kubernetes, including containerized deployment, service orchestration, auto-scaling, and configuration management.
• Experience with AWS cloud services is a plus.
• Strong coding standards, documentation skills, and teamwork abilities.