Tech Abstractions: Read. Practice. Get scored.

Theory-first chapters cover production systems, not toy examples — every chapter builds the mental model before you practice. All 11 chapters are free to read, with workbook exercises inline and content written for mid-level to staff engineers.

Practice questions put you in real production scenarios with named systems, scale constraints, and a 3-rung follow-up ladder (mid-level → staff). Submit your answer and an LLM judge scores it across 4 rubric dimensions, showing exactly what you covered and what you missed.

• 11 free chapters across 3 courses — production AI/ML, not survey content
• 18 practice questions with 3-rung escalation ladders (mid → staff difficulty)
• LLM rubric scoring across 4 dimensions + expert answer after every submission
• Progress dashboard — score trend, domain coverage map, weak-area callouts
• Interview simulator coming soon — live AI interviewer with real-time rubric panel