Free Data Engineering Interview Platform Disrupts Expensive Market

The data engineering interview prep market has fragmented into $50+/month subscriptions that leave major blindspots, forcing candidates to juggle multiple services. DataDriven.io disrupts this with a completely free platform built by someone with 250+ interview experience, offering real code execution, AI mock interviews, and company-specific problems. This matters because job seekers can now practice with actual interview pressure and formats without financial barriers or the incomplete coverage that plagues existing paid alternatives.