Part one
- Competitive Programming
-Arrays to DP, graphs, and bit tricks — patterns that unlock most coding interview problems.
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+ Interview Prep DevNinja
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Coding · System design · AI · interview-ready
+DevNinja · Interview preparation
Interview Prep
-- Three parts in one book — plus Interview Labs rewritten for how interviewers actually score you: - why they ask, level bars, expected arcs, follow-ups, mistakes, and production examples. +
+ Prepare for coding, system design, and AI interviews the way hiring loops actually score you — + expected answers, level bars, follow-ups, and production-ready diagrams.
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- One book. Three tracks.
-Real HTML chapters — selectable text, syntax-styled code, and diagrams only where a picture helps.
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Part two
- System Design
-Building blocks plus walkthroughs for URL shorteners, chat, feeds, storage, video, and ride hailing.
-Part three
- AI Engineering
-A deep, story-driven path: how LLMs work, prompting, RAG, memory, agents, MCP, skills, and designing a full assistant.
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+ Start here
+Three paths. Pick the one that matches your next interview.
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+ 01
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Learn the scoring lens
+Why interviewers ask, what they evaluate, and the answer structure to hit every time.
+ Open playbook → + + + 02 +Practice Interview Labs
+55 FAANG-frequency prompts across coding, system design, and AI with deep solutions.
+ Browse labs → + + + 03 +Target a company
+Google, Amazon, Meta, Microsoft, Netflix, Uber, and AI platform interview patterns.
+ Company guides → + +
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- Interview Labs
-55 FAANG-frequency prompts with interviewer intent, Junior→Principal expectations, and production examples.
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Coding
- 20 coding questions · interview lens
-Why asked, level bars, step-by-step solutions, follow-ups, common mistakes, and real-world uses.
-System design
- 18 design questions · interview lens
-Whiteboard tracks with diagrams, trade-offs, and company-scale failure modes.
-AI
- 17 AI questions · interview lens
-RAG, agents, serving, eval, and security — scored the way AI hiring loops score.
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+ Interview Labs
+Expandable questions with interviewer intent, Junior→Principal expectations, and production examples.
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+ Coding
+ 20 questions
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+ Coding Interview Lab
+Two Sum to Alien Dictionary — patterns, diagrams, complexity talk tracks, and common mistakes.
+ Practice coding → + + +
+ System design
+ 18 questions
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+ System Design Lab
+URL shortener through payments, crawlers, and Kafka — whiteboard flows and failure modes.
+ Practice design → + + +
+ AI
+ 17 questions
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+ AI Interview Lab
+RAG, agents, serving, eval, and security — scored the way AI hiring loops score.
+ Practice AI → + +
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Guides & roadmaps
-Role paths, comparisons, company prep, and behavioral — structured for interviews, not docs.
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+ Guides & roadmaps
+Structured preparation — comparisons, behavioral, revision, and role-based paths.
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+ Paths
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Learning paths
+Backend, AI, Data, DevOps, Staff.
+ + + Trade-offs +Comparisons
+Kafka, Redis, REST, SQL/NoSQL.
+ + + Revision +Cheat sheets
+Night-before flashcards.
+ + + Behavioral +Behavioral & HR
+STAR, LPs, resume probes.
+ + + Companies +Company guides
+FAANG and enterprise.
+ + + Structure +Playbook
+Universal answer arc.
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Structure
- Interview playbook
-The universal answer structure every lab card follows.
-Paths
- Learning paths
-Backend, AI, Data, DevOps, and Staff/Principal roadmaps with prerequisites.
-Revision
- Cheat sheets
-Flashcards and one-pagers for the night before.
-Trade-offs
- Comparisons
-Kafka vs RabbitMQ, Redis vs Memcached, REST vs GraphQL, SQL vs NoSQL.
-Companies
- Company guides
-Google, Amazon, Meta, Microsoft, Netflix, Uber, AI labs, enterprise.
-Behavioral
- Behavioral & HR
-STAR stories, Leadership Principles, resume deep-dives, mock prompts.
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Knowledge tracks
+Deep topic pages with code, diagrams, and interview drills.
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Contents
-Jump into any chapter. Each one is a normal web page you can search, copy, and skim.
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Browse all topics
+Every guide and chapter — searchable HTML pages, not PDF screenshots.
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Diagrams from the book
-Architecture sketches redrawn as clean SVGs for each topic — not photographed PDF pages.
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Architecture diagrams
+Whiteboard-ready figures for request flows, components, and algorithms.
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+ More from DevNinja
+Interview Prep is part of the DevNinja engineering ecosystem.
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