2019年末来到广告组。主要贡献有：

1. 发现现有邮件重定向以及购物小票数据批处理流需要优化。定位了多处性能瓶颈，并重新设计并实现了以上批处理流。使得SLA从24小时以上降到了不到8小时。同时减少了60%的硬件需求。

2. 作为targeting组对Gemini（Yahoo产品原生广告）的联系人，通过提供技术方案、实现新功能以及出现线上问题时共同debug的方式，支持了Gemini对targeting的集成需求。实现了以下功能：

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Relocated to the U.S. and working on central tech team to help on multiple projects to build a reliable platform. Including:

1. As the POC of Yahoo Push Notification System for GDPR compliance, designed and implemented the GDPR client with the entire OnePush team to support all GDPR requirements.

2. Continue supports Image processing/serving service. Implemented features like Smart Crop/Gamma Correction/Color Thief and so on to make sure it meets customers' requests on image processing part.

3. Designed and implemented YAMAS(Yahoo's monitoring system) v2 collector to replace v1 collector; After the v2 release, the collector as the most unstable component in v1 became super stable.

4. Build and released Comet SDK for iOS to support YAK scenario. (YAK is to allow Yahoo users to sign-in with device push notifications instead of password).

带领一个5人团队设计并实现了Yahoo图片在线处理的后台服务的第二版。

1. 稳定服务超过2000 RPS;

2. 自我保护，不会被突发的大流量访问击垮；

3. 将图片平均处理时间从100ms 降到 30ms;

设计实现了WebGW（Yahoo移动门户）的一个子系统来支持实时改变用户（property）注册信息而不需要产品部署以及服务器重启。