Amazon Data Engineer (L5) — Virtual (US) — Offer. I recently cracked it. Process: recruiter chat (30m) → 1–2 tech screens (SQL/Python/ETL + optimization) → loop 4–5 panels: SQL deep dive, ETL design, data modeling; Manager + Bar Raiser (LP-heavy). Prep: joins/windows/CTEs; nested JSON, sliding windows, dedup/late data; facts/dims, SCD, partitions; Redshift/S3/Spark. Takeaway: tech + LPs both key; ~4 weeks.