DataEngPrep.tech

DataEngPrep is a focused interview prep platform for Data Engineers.

1,863 curated questions from real interviews at Amazon, Google, Databricks, Goldman Sachs, Walmart, and 97+ other companies. Every answer is written at Senior/Principal depth with trade-offs, architecture diagrams, and pro-tips.

Revenue model:

- Free: Browse all 1,863 questions with partial answer previews

- PDF Bundles: $21 / $51 / $151 (one-time purchase via Gumroad)

- Pro subscription (coming soon): Full answer access + AI coaching

Built with: Next.js, Firebase, Stripe, Google Gemini AI, Vercel

Tech stack details:

- 1,863 SEO-optimized question pages (all indexed)

- Partial answer reveal model (Chegg/Medium-style paywall)

- JSON-LD schema on every page

- ISR for fresh content