Po Jen Chen Email & Phone Number

New York, Ny, Us

Taipei, Tw

Pinkoi is an international design-oriented e-commerce company like Etsy in the US with 5M+ users and 2M+ items. As a leader, I led 4 full-time team members and 80% of the projects delivered by my team reached their goal and 30% of them met the stretch goal because of the learning-oriented, genuine, autonomous culture I built.- Led 4 full-time AI team to collaborate with other teams and build ML applications.- Proposed a ranking model roadmap and improved 10.2% add-to-cart rate by leading three team members to apply different levels of personalization using random walk and word2vec models in the ranking system trained by Catboost.- Reduced response time by 25% by deploying an embedding-based item recommendation model trained from Factorization Machine, and serving it as an API on AWS EC2 using FastAPI and SCANN.- Improved the average add2cart count per user by 2% by leading teams to rebuild the category and filter system robustly and cooperating with the business, engineering, and product team.

Taipei, Tw

- Achieved 11-12% CTR and reduced the bounce rate by 7% by building new keywords recommendation on the item page through user behaviors and association rules and collaborating with a cross-functional team.- Improved 140% in the MAP@5 by applying personalization using statistical methods on the APP homepage to 1M recently active users and cooperating with the product team.- Improved 2.3% CTR in search result pages and 3% CVR by extracting highly relevant keywords from items to improve the search precision with ElasticSearch search system.

Tw

Junyi Academy is an education nonprofit organization like KhanAcademy in the US with currently 100k+ WAU. As a team lead, led 3 full-time and 2 part-time members including web developers, data engineers, and data scientists to build an online service end to end.Data scientist:- Improved the correct rate by 10% after accepting the recommendation using NLP to extract content relations and developing a feature to recommend learning content more precisely. - Led the intern to achieve 90% accuracy of prediction in students with XGBoost to fill the null value of users’ roles. - Built up a high-rating knowledge map POC by extracting the learning pattern from over 10 billion students’ historical data to recommend teachers learning paths to help their students know how to learn.Data engineer:- Reduced the 60% cost when PM want to get the key index by building a cleaner code and data warehouse table. - Released over 16M logs and over 100K users’ open data with 24k+ views to let everyone enthusiastic about education engage in personalized education.- Have experience of migrating data pipeline from the jenkins to airflow. Reduce the effort of handling retry and decrease the building time.Data team lead: Lead a data team consisted of 3 full-time and 2 part-time. - Ran Kanban to manage the data projects and completed the data projects 100% on time.

Master Of Science - Ms, Institute Of Communications Engineering

Bachelor'S Degree, Electrical Engineering Department