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You can lose a senior offer in one hour, without a single technical mistake.

At the senior level, most candidates who reach the interview loop can do the technical work. The behavioral round is where companies choose between them — and where they set your level, which sets your compensation. It is the most expensive hour of the hiring process, and the one senior engineers prepare for least.

This book fixes that — specifically for data engineers and data architects. Not generic career advice: the behavioral situations only data people face, treated with the same rigor a system design interview demands. The 2 AM pipeline page. The backfill that made things worse. The executive who says your numbers are wrong. The cloud bill that tripled.

Inside:

- The interviewer's side of the table — the seven competencies, the signals they hunt, the rubric they score with, and the debrief where your offer is actually decided.

- One answer framework — STAR upgraded with the four seniority signals, plus the follow-up-chain playbooks that make deep questioning work for you.

- Story engineering — build a bank of 12–15 true stories from your own career, watch one real story told six ways for six competencies, and learn the five dials that separate a Senior answer from an Architect answer built on the same facts.

- 300+ real questions with answer sketches and trap warnings — and the 30 that cover all the rest.

- Company playbooks — Amazon's Leadership Principles and bar raiser, Microsoft, Databricks, Stripe, Revolut, Booking.com, and how to re-tune for any company in one evening.

- 30 full mock interviews with follow-up chains and scoring commentary — including two deliberate failures, autopsied.

- AI-assisted preparation — four ready-to-use workflows that turn any AI assistant into your story-mining partner, your relentless mock interviewer, and your scoring machine, without making you sound like a machine.

No scripts to memorize — memorized answers break on the first follow-up, and interviewers hear them within a sentence. Everything here runs on one non-negotiable input: true stories from your own career. This book organizes them, frames them, and rehearses them until your experience is finally visible.

Companion to Cracking the System Design Interview for Data Engineers. Written by an engineer who has led data platforms for two decades, run the interviews from both sides of the table, and onboarded ~50 engineers along the way.

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Kick off your book project, get started with GhostAI, get better at marketing, or spend the day doing all three! Free live workshops on Zoom. Saturday, June 27, 2026.

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