SERGEI K.

I'm a Data Engineer with 3 years of experience, specializing in distributed databases and SQL optimization. In my recent role, I built a 60TB data warehouse using Greenplum that processes 2 million rides, generating 10-20 million records daily. I have extensive experience with MPP databases like Greenplum, ClickHouse, and Redshift. I'm proficient in SQL and Python, which I use for building ETL pipelines. In my previous role, I completely rebuilt a data processing system, improving performance from 17 hours to 2 hours, helping clients access reports much faster. I also automate workflows with Airflow and work with AWS services like Redshift and S3 for data storage and processing.