Md Zeeshan

Data Engineer with hands-on experience in designing and developing batch ETL data pipelines using PySpark (Spark3), AWS EMR, S3, Hive, and Apache Airflow. Skilled in ingesting JSON/API data, applying transformations (joins, aggregations, window functions), and publishing curated datasets for analytics. Experienced in Hive external tables, partitioning, and performance tuning using caching and join strategies.