· Developed innovative article layout for Android mobile app (Kotlin, Jetpack Compose), enhancing user experience and engagement for over 10M users.

· Collaborated with internal product teams, including Yahoo Sports and Yahoo Finance, to drive product design and conducted A/B testing to optimize customer preferences.

· Provided technical solutions in the field of data engineering, networking services and data pipeline construction (Hadoop ecosystem, EC2, S3 Storage, Kafka) for AWS customers.

· Earned internal AWS Cloud Certifications in Bigdata, Analytics services’ infrastructure and applications.

· Collaborated with 4 engineers in an online banking system project, which later released for over 3M active users.

· Implemented the transaction functionality, such as Currency Transfer and Invest Signal Alarm (Java, AngularJS).

· Developed a search engine proxy for LINE HUB using Flask, CI/CD pipelines, and container technology.

· Constructed a scheduler system for advertisement content feeding in lambda function, which was later released for over 600M registered users.