❖ Experience that dealt with PB level mail metadata, using Spark to aggregate data, analyze data or build ML models. ❖ Experiment with heuristic rule to reduce FP email error rate for Microsoft teams mail by 69%. ❖ Refactoring the classification service, converting the Rule-based (python) into ML-based (go), the recall achieves 95%. ❖ Experiment to train Bert model extracting mail’s subject into embedding vectors for multi-task learning, the average of recall achieves 98%. ❖ Stress testing for Bert model of tf-serving service, tuning service params and instance’s params. ❖ Optimize bert service by using TenorRT, increasing QPS from 300 to 1500 and reducing GPU cost by 2⁄3. ❖ Implement bert Tokenizer algo by go. (following python code to implement). ❖ Build up the SafetyNet for customer outbound contact people based on domain and address , recusing 10% FP case.

❖ Debugged client’s Campaigns, then released campaigns to production. ❖ Delivered datafeed and model’s result to MySQL, then displayed result to demo site (Simulate client’s situation). Add the some features and fix bugs on the demo site. ❖ Developed API using Node Red, integrated EPA API and MaxMind to identify location, then return UVI (GoeHash & distance measure). ❖ Designed CMS backend server, developing transform datafeed to csv, and cron job triggers automatically.

❖ Refactored the frontend’s project architecture to clean code, optimizing the development process. ❖ Developed frontend’s UI components, using pure css (styled-components) to build custom components . ❖ Used axios and relay to connect restful API and GraphQL.

❖ Used Regression&Booting model to analyze potential key factor. ❖ Built data pipeline automatic procedure.

❖ Developed AWS Lambda API for object detection using OpenCV. ❖ Refactored dashboard platform’s frontend, optimized web speed and redesign project structure. ❖ Built Flow test request system(flask, Django ), like DDOS system combined with AWS services, simulating million requests to test server tolerable. ❖ Developed E-commerce platform frontend’s components (Typescript react).