● Built integrations in Python to extract data from 20+ external APIs (REST, GraphQL, and SFTP) for a fast-growing data platform that was used by 500+ clients to optimize their advertising campaigns. ● Designed a Python application to enable non-developers to create and configure batch ETL pipelines. ● Maintained adtech-related ETL pipelines in Python, SQL, R to ensure data correctness, increase throughput, and enhance pipeline reliability. ● Participated in ETL pipeline development for a market-research project for a Western bank. ● Sped up a financial data processing Python script from 6 hours to 6 minutes for an Asian client. ● Performed applied economic research based on quantitative (econometric) methods.