My PRs:

DataFusion: https://github.com/apache/datafusion/pulls?q=is%3Apr+author%3Asdf-jkl

Arrow: https://github.com/apache/arrow-rs/pulls?q=is%3Apr+author%3Asdf-jkl

• Developed an Airflow pipeline with Polars to sync Data Lake data to ArcGIS, enabling

maintenance scheduling and reducing redundant rail closures, saving hours of labor

• Developed a Python batch processing library with Polars and concurrency, boosting

efficiency from 200 to 1500 rows/min

• Automated ETL processes and streamlined repetitive tasks using Apache Airflow, saving

5+ hours of manual data processing per week

• Initiated data deduplication using sentence-transformers and cosine similarity, saving

hours of manual work and improving database quality