I am currently responsible for maintaining the backend of a streaming platform. - Switch the nudity detection service from Gear to Tupu, saving about 50% of the costs. - Implemented the Agora chat service to replace Pusher for creating a publish-subscribe system, encompassing 80% of the services, including chat, gift giving, and other interactive live streaming features. Responsible for all backend development and architectural design. - Self-hosted and implemented the Chatwoot service for enhanced customer support. - Developed a homepage advertisement system, including both frontend and backend development as well as API integration. - Created the backend system for a new game, handling payout calculations and transaction deductions. - Upgraded AWS EKS Kubernetes from version 1.21 to 1.24.

I am currently responsible for maintaining the backend of YouNow platform.

- Managed a team of six developers, responsible for project management, staff recruitment, and one-on-one meetings. - Collaborated with Product Owner, marketing and sales team to analyze requirements and lead the team to implement them. - Migrated version control system from SVN to Git. - Implemented GitLab CI pipeline to improve deploy process. - Built a scrum team from ground up, developed various project over the span of 9 months. - Resolved sqlrelay problem in PHP version upgrade. - Constructed the architecture for a points system and coordinated with multiple dev teams on implementations and discussions - Managed the frontend team, including project management and staff recruitment. - Improved SEO Web vital scores with the frontend team.(CLS, LCP)

- Built restful API standard in PHP, including response format and exception handling(using slim framework) and created API documents with swagger. - Collaborated with Product Owner and marketing and sales to analyzed requirements and implemented them. - Lead a team to build a shopping cart system, implemented memcache system to improve data loading speed by 50% - Implemented dependency injection principle to refactor the shopping cart that improve maintainability and reduce coupling. - Designed a notification center system and improved performance by using RabbitMQ and memcache. - Built backend developer onboard documents. - code review

- Developed payment system with third-party API, logistics service system(t-cat), 7-11 logistics system and credit card 3D verification system in PHP. - Maintained company-wide program in PHP. - Built tools that cut backend team’s time by 20% in convert system encoding from big5 to utf8.