You Can’t Trust COUNT and SUM: Scalable Data Validation with Merkle Trees
A Merkle Tree is a scalable, SQL-friendly approach to verifying data integrity — widely used in systems like Git, blockchains, and distributed databases.
What Data Engineers Really Do: It’s Not Pipelines — It’s Guarantees, Contracts, and Cost-Aware Systems
Modern data engineering isn’t about building pipelines — it’s about building trust, reliability, and cost-aware systems. This article reframes the role and explains what experienced engineers actually do.