1.1 Leading Project: Enterprise B2B Message Flow Handling and Archiving• Led the project from scratch and handled most of the coding. Offered message process, monitor, archiving services.• To support customized actions, implemented a Plug-in and Event-Driven system that handles 500,000 messages per day.1.2 Team Product: B2B Message Integration Suite | Example Customer: Philips DA• Tech Stack: Java, Spring, Cloud Foundry, PostgreSQL, Kafka, ELK, Junit, Selenium, Agile• Collaborated with PM, PO to manage requirements, translated business logic into code, performed comprehensive design, coding and testing, track customer tickets to resolve their issues, and assigned tasks to junior engineers.• Analyzed system dependencies upstream and downstream and communicate requirements to 5 peer teams.

2.1 Leading Project: Controller System Performance Improvement Campaign• Achieved: The API performance increased by a factor of 10, achieving TPS 1000, with collaboration among 5 teams. Supported Sales Promotion Scenarios, enabling customers to rapidly request numerous EC2 on our cloud website.• Challenges: Fixed issues related to Large Database Transactions by implementing a two-stage split solution. Designed a keep-order framework to preserve the order of north and south requests in high-concurrency scenarios.• Monitoring: Engineered a scalable architecture via MapReduce for comparing the configuration of Configuration Center with 40,000 distributed nodes. Decreased task runtime from 16 hours to 4 hours, achieving a 75% improvement.2.2 Team Product: Cloud Network Controller | Example Customer: Tokyo 2020 Olympic Games• Tech Stack: Java, Spring, Python, MySQL, Zookeeper, Kubernetes, Redis, EC2, VPC• Achieved: Developed a Network Controller System and provided APIs for use by upstream systems, supporting various Cloud products including EC2, VPC, Route Table, ACL, LB, VPN, Dedicated Line, EIP, etc.• Reliability: Designed a version control algorithm to prevent packets loss and ensure no-repeated consumption. Engineered a robust disaster recovery mechanism to ensure seamless operations in case of system crashes.• Scalability: Managed a globally distributed service across 30+ regions, utilizing DNS, gateways, and load balancers. Transformed the system into stateless architecture enabled automatic scaling of nodes based on API load.

Owned the design, development of an OpenStack Cloud Deployment Management, reducing the time required by 70%.

Developed a permission system using Role-Based Access Control Model, streamlining the processing management.