ADSP Global Customer Experience

• Worked on expanding Amazon's DSP to international marketplaces.

• Implemented core changes to support the rollout of regional advertiser accounts.

• Enhanced account navigation by adding regional suffixes to the breadcrumbs, improving advertiser usability and reducing friction in identifying account regions.

• Developed and deployed an internal compliance dashboard in React and Cloudscape that automatically surfaced code violations across the codebase, increasing visibility into global compliance gaps.

• Upgraded infrastructure dependencies by modernizing JDK versions and updating testing frameworks (e.g., Cypress, JUnit), improving build reliability and maintaining operational excellence.

• Extended the spreadsheet bulk uploader to support multi-country orders from a single global advertiser account (Americas/EMEA/APAC), reducing manual creation time by 70% and enabling bulk creation for 30+ countries.

Real-time Bidding Experimentation

• Designed and deployed Apache Spark jobs (AWS EMR) on AWS Cloud Formation and Step Functions to generate weather features to improve the model used for ranking ads

• Transformed raw data into an ingestible structure using Spark SQL and mapping functions in Scala

Worked in the CLOVA Platform Development team. Gained experience on solving challenges that a distributed system under large volume of traffic might face.

As a KATUSA (Korean Augmentation to the U.S. Army), I have worked as a IT specialist within the U.S. Army's military intelligence section. As an IT specialist, I have done the following.

1. Maintained networks, hardware and software. Experienced in various areas starting from installation to troubleshooting problems for machines.

2. Provided customer and network administration services.