ETtoday

• Optimize user targeting on digital ads based on domain knowledges and improve the CTR about 30% in shorter develop cycle.
• Improve user age estimation by adding a lot of feature engineering to our model and migrate it from SQL to Spark dataframe to withstand the increasing code complexity.
• Analyze user age model by conducting error analysis and designing a A/A testing to evaluate the data source quality, that leads to the decision of shut-downing the product.
• Develop tag making web-app that helps PM to make bespoke keyword-based tags for audience targeting and eliminates the need of engineers;  implement UI with web-component and utilize word embedding to augment users for idea inspiration.
• Develop recommendation framework and design it with the purpose to facilitate cooperation between engineers and algorithm experts at developing next version of recommendation. 
• Develop recommendation for an E-commerce by implementing API endpoints and the business logic part of the system with the technique of Reactive Programming and Cake Pattern written in Scala. 
• Develop recommendation for news based on news similarity to increase the page views; implement with document embedding for similarity scoring, Kafka for streaming, and Numpy for kNN search.
• Develop inventory control prototype to increase the revenue of a retailer by implementing demand forecasting and inventory reordering optimization.
• Maintain data pipelines by fixing broken and optimizing slow pipelines on Spark; refactor SQL-based pipeline to reduce clutters and enhance performance; explain data logic to and modify as requested for stakeholders. The scope in charge was about hundreds of SQL files for the core services and dependent stakeholders.
• Maintain behavior data collecting by fixing and validating the browser-side behavior tracking; collaborate with stakeholders to add new collecting points; watch changes of the browser policy and plan forward migration to reduce undesirable impaction.

Senior Data Engineer, R&D Department Data Application Team

• Develop a behavior testing framework POC that provides code utilities specific to our product based on Python and Page Object Pattern and the integration of app automation tools and behavior testing tools.
• Develop a news material web-app that provides popular and up-to-date news materials for our journalists.

  Software Engineer, R&D Department

Eastern Information Technology Corporation

• Develop FB crawler to provide the core data source for our data product by crawling millions of public data from Facebook and equipping it with an intricate mechanism to avoid the anti-bot protection.

Software Developer, Online-CRM team

A product-minded engineer striving for making impactions.

Taplio

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