Lead a team, combined with GDPR and other regulators, defined the TikTok user privacy protection business architecture, and be responsible for technical planning, architecture design, and implementation.

Designed and launched the OpenAPI system of Douyin open platform (open.douyin.com) from scratch, and lead the design of account, application, and permission models of the open platform.

Designed and developed Gateway and Business operation support system for car rental application.1) API gateway implementation consists of front-and-back request routing, RPC calls converting(from HTTP restful to RPC call, also called generic call), request signature verification, rate limiter, circuit breaker, authentication2) Built an API composer to aggregate multi-API invoke and introduce saga mechanism to solve distribute transactions Develop business operation support system (BOSS) for customer and car management3) Upgraded the car rental operation support system to the SaaS platform with multi-tenant management. Designed and developed an SSO account subsystem based on the CAS, authentication subsystem based on the RABC.

Lead the application and web team and launched Didi Chuxing's car rental application.Design and develop a Hybrid Framework for front-ends includes offline resource loading mechanism, page container, and JSBridge. Greatly improve APP and H5 development efficiency and H5 page experience(reducing 70% page loading latency). At the same time, reduce 25%+ APP package volume.

Responsible for architecture design and lead a team to launch the sponsored vertical search system. - Designed and developed the online ad search system consists of 1) gateway for traffic protocol converting(from RPC to FastCGI) , routing (gateway) and fault tolerance, 2) advertising aggregator service for result aggregation and UI logic, 3) keyword trigger service for keyword pre-dealing and search result gathering/merging and 4) ads search engine(reverse index server); - Lead and launched the advertising marketing system consists of keyword recommendation, purchase, audit, billing, budget and reporting modules