Ze Chen Email & Phone Number

Mountain View, Ca, Us

Building Google Private Cloud.

Seattle, Wa, Us

➤ Launched adaptive CTR model that adapts to the fast change of shopper behaviors. Accelerated the ETL and model training pipeline, reduced the click feedback delay by 80%. Increased annualized ads revenue.➤ Developed deep learning CTR models (MLP + Embedding) for real-time batch inferencing with low latency requirements (~7ms).➤ Built a model online/offline feature parity analyzer. Detected and fixed online/offline inconsistency issue in CTR model. Improved model robustness. Reduced model online/offline performance skew.➤ Designed and implemented prediction auto adjustment (p controller) for CTR model worldwide, reduced CTR bias by 85% in a dynamic market during Q2/2020.➤ Launched holiday CVR models specific for 2019 Primeday and Black Friday. Enabled the model to capture hourly trend in holiday traffic. Reduced the prediction bias by 50% and increased ads revenue within 48 hours.➤ Built an event triggering DL pipeline that trains and publishes CTR/CVR models in a daily basis.

Seattle, Wa, Us

➤ Designed and built a scalable service dedicated for Alexa message notification delivery. Developed a mechanism to keep notification in sync across multiple Alexa devices and model phones.➤ Designed and implemented a set of Alexa platform APIs that allows all Alexa devices (1P/3P devices, Alexa phone apps) to integrate with Alexa Messaging service.➤ Led the messaging functionality development on Echo kids’ edition. Developed parent control and contact filtering features.➤ Delivered Android backend and frontend code in the Alexa SMS project. Enabled Alexa to send SMS message to contacts.➤ Implemented the feature of “In Order Processing”. Improved user experience by solving the problem of messages being delivered out of order.

Round Rock, Texas, Us

➤ Conducted full-stack development on TSR – an ASP.NET web system providing version control service for manufacturing process data of EMC’s major storage devices➤ Dramatically improved TSR’s data loading speed, reduced the loading time by 80% ~ 95%➤ Redesigned the data layer of TSR by implementing stored procedure and index in SQL Server➤ Developed in server side to modify permission control for different departments➤ Improved user interface and added mobile friendly feature by implementing Bootstrap

Master’S Degree, Computer Science

Bachelor’S Degree, Computer Software Engineering