I'm a Senior Data Engineer with 15 years of hands-on experience building, optimising, and scaling data infrastructure for large enterprises. I currently work with Vertica, Apache Doris, StarRocks, Trino, Apache Iceberg, and Apache Spark in production environments — not in tutorials, but on real petabyte-scale workloads. My work spans database architecture, data pipeline design, query performance tuning, and data platform strategy. I've managed data administration across distributed clusters, led migrations between database systems, and designed ingestion pipelines processing billions of rows daily. On Twitter/X as @mohdatif1987 (DatabaseMan), I share deep technical insights on MPP databases, data lakehouse architectures, and real-world data engineering — content that comes from production experience, not textbooks. I consult with engineers, data teams, and architects who want to get the most out of modern data stacks — whether that's picking the right database, debugging a performance issue, or planning a platform migration.