Home
Data Structures and Algorithms
About

Guide contents

Staff Engineer System Design

Thinking Like a Staff Engineer

1.Chapter 1: The Staff Evaluator Lens
2.Chapter 2: The Staff Decision Loop, Part 1 (Understand)
3.Chapter 2: The Staff Decision Loop, Part 2 (Decide)
4.Chapter 3: The Five Core Primitives

Distributed Rate Limiting and Abuse Defense

5.Rate Limiting: Framing, Scale Math, and Architecture
6.Rate Limiting: Token Leasing, Policy Governance, and Deep Dives
7.Rate Limiting: Interview Calibration, Opinions, and Runbooks

Mission-Critical Payment Gateway and Double-Entry Ledger

8.Payment Gateway and Ledger: Framing, Scale Math, and Architecture
9.Payment Gateway and Ledger: Ledger Engine, State Machine, and Deep Dives
10.Payment Gateway and Ledger: Interview Calibration, Opinions, and Runbooks

Flash Sales and High-Contention Inventory

11.Flash Sales and Inventory: Framing, Scale Math, and Architecture
12.Flash Sales and Inventory: Reservation Engine, Anti-Bot Defense, and Deep Dives
13.Flash Sales and Inventory: Interview Calibration, Opinions, and Runbooks

Distributed Task Scheduler and Job Orchestrator

14.Task Scheduler: Framing, Scale Math, and Architecture
15.Task Scheduler: Scheduling Engine, Schemas, Fencing, and Deep Dives
16.Task Scheduler: Interview Calibration, Opinions, and Runbooks

Distributed Message Queue at Hyperscale

17.Message Queue: Framing, Scale Math, and Architecture
18.Message Queue: Commit Log, Rebalancing, and Deep Dives
19.Message Queue: Interview Calibration, Opinions, and Runbooks

Real-Time Ride Dispatch and Geospatial Matching

20.Ride Dispatch: Framing, Scale Math, and Architecture
21.Ride Dispatch: Spatial Indexing, Batch Matching, and Deep Dives
22.Ride Dispatch: Interview Calibration, Opinions, and Runbooks

High-Throughput Notification and Fan-Out Engine

23.Notification Fan-Out: Framing, Scale Math, and Architecture
24.Notification Fan-Out: Suppression, Rate Shaping, and Deep Dives
25.Notification Fan-Out: Interview Calibration, Opinions, and Runbooks

Real-Time Collaborative Chat & Presence

26.Chat and Presence: Framing, Scale Math, and Architecture
27.Chat and Presence: Sequencing, Fan-Out, and Deep Dives
28.Chat and Presence: Interview Calibration, Opinions, and Runbooks

Distributed File Storage & Sync Engine

29.File Storage and Sync: Framing, Scale Math, and Architecture
30.File Storage and Sync: Chunking, State Machine, and Deep Dives
31.File Storage and Sync: Interview Calibration, Opinions, and Runbooks

Ultra-Low Latency Financial Order Matching Engine

32.Order Matching Engine: Framing, Scale Math, and Architecture
33.Order Matching Engine: Limit Order Book, Disruptor, and Deep Dives
34.Order Matching Engine: Interview Calibration, Opinions, and Runbooks

News Feed and Social Timeline Fan-Out

35.News Feed Fan-Out: Framing, Scale Math, and Architecture
36.News Feed Fan-Out: Deep Dives, Data Models, and Schemas
37.News Feed Fan-Out: Resilience, Interview Questions, and Runbooks

Global Video Streaming and Edge CDN

38.Video Streaming and CDN: Framing, Scale Math, and Architecture
39.Video Streaming and CDN: Deep Dives, Data Models, and Failure Modes
40.Video Streaming and CDN: Staff Interview Calibration and Runbooks

Search Autocomplete and Inverted Index Engine

41.Search Autocomplete and Inverted Index: Framing, Scale Math, and Architecture
42.Search Autocomplete and Inverted Index: Deep Dives, Data Models, and Failure Modes
43.Search Autocomplete and Inverted Index: Staff Interview Calibration and Runbooks

Globally Distributed URL Shortener & Analytics

44.URL Shortener: Framing, Scale Math, and Architecture
45.URL Shortener: Deep Dives, Data Models, and Schemas
46.URL Shortener: Failure Modes, Interview Questions, and Runbooks

Real-Time Collaborative Document Editing

47.Collaborative Editing: Framing, Scale Math, and Architecture
48.Collaborative Editing: Deep Dives, Peritext, and Data Models
49.Collaborative Editing: Failure Modes, Interview Questions, and Runbooks

Interview Mastery and the Staff Evaluator

50.Pacing the 45-Minute Staff Interview
51.What Interviewers Are Actually Evaluating
52.Controversial Opinions: Greatest Hits
53.Coming in Volume 2: Advanced Infrastructure and the Full Playbook Syllabus

Staff Engineer System Design

Thinking Like a Staff Engineer

1.Chapter 1: The Staff Evaluator Lens
2.Chapter 2: The Staff Decision Loop, Part 1 (Understand)
3.Chapter 2: The Staff Decision Loop, Part 2 (Decide)
4.Chapter 3: The Five Core Primitives

Distributed Rate Limiting and Abuse Defense

5.Rate Limiting: Framing, Scale Math, and Architecture
6.Rate Limiting: Token Leasing, Policy Governance, and Deep Dives
7.Rate Limiting: Interview Calibration, Opinions, and Runbooks

Mission-Critical Payment Gateway and Double-Entry Ledger

8.Payment Gateway and Ledger: Framing, Scale Math, and Architecture
9.Payment Gateway and Ledger: Ledger Engine, State Machine, and Deep Dives
10.Payment Gateway and Ledger: Interview Calibration, Opinions, and Runbooks

Flash Sales and High-Contention Inventory

11.Flash Sales and Inventory: Framing, Scale Math, and Architecture
12.Flash Sales and Inventory: Reservation Engine, Anti-Bot Defense, and Deep Dives
13.Flash Sales and Inventory: Interview Calibration, Opinions, and Runbooks

Distributed Task Scheduler and Job Orchestrator

14.Task Scheduler: Framing, Scale Math, and Architecture
15.Task Scheduler: Scheduling Engine, Schemas, Fencing, and Deep Dives
16.Task Scheduler: Interview Calibration, Opinions, and Runbooks

Distributed Message Queue at Hyperscale

17.Message Queue: Framing, Scale Math, and Architecture
18.Message Queue: Commit Log, Rebalancing, and Deep Dives
19.Message Queue: Interview Calibration, Opinions, and Runbooks

Real-Time Ride Dispatch and Geospatial Matching

20.Ride Dispatch: Framing, Scale Math, and Architecture
21.Ride Dispatch: Spatial Indexing, Batch Matching, and Deep Dives
22.Ride Dispatch: Interview Calibration, Opinions, and Runbooks

High-Throughput Notification and Fan-Out Engine

23.Notification Fan-Out: Framing, Scale Math, and Architecture
24.Notification Fan-Out: Suppression, Rate Shaping, and Deep Dives
25.Notification Fan-Out: Interview Calibration, Opinions, and Runbooks

Real-Time Collaborative Chat & Presence

26.Chat and Presence: Framing, Scale Math, and Architecture
27.Chat and Presence: Sequencing, Fan-Out, and Deep Dives
28.Chat and Presence: Interview Calibration, Opinions, and Runbooks

Distributed File Storage & Sync Engine

29.File Storage and Sync: Framing, Scale Math, and Architecture
30.File Storage and Sync: Chunking, State Machine, and Deep Dives
31.File Storage and Sync: Interview Calibration, Opinions, and Runbooks

Ultra-Low Latency Financial Order Matching Engine

32.Order Matching Engine: Framing, Scale Math, and Architecture
33.Order Matching Engine: Limit Order Book, Disruptor, and Deep Dives
34.Order Matching Engine: Interview Calibration, Opinions, and Runbooks

News Feed and Social Timeline Fan-Out

35.News Feed Fan-Out: Framing, Scale Math, and Architecture
36.News Feed Fan-Out: Deep Dives, Data Models, and Schemas
37.News Feed Fan-Out: Resilience, Interview Questions, and Runbooks

Global Video Streaming and Edge CDN

38.Video Streaming and CDN: Framing, Scale Math, and Architecture
39.Video Streaming and CDN: Deep Dives, Data Models, and Failure Modes
40.Video Streaming and CDN: Staff Interview Calibration and Runbooks

Search Autocomplete and Inverted Index Engine

41.Search Autocomplete and Inverted Index: Framing, Scale Math, and Architecture
42.Search Autocomplete and Inverted Index: Deep Dives, Data Models, and Failure Modes
43.Search Autocomplete and Inverted Index: Staff Interview Calibration and Runbooks

Globally Distributed URL Shortener & Analytics

44.URL Shortener: Framing, Scale Math, and Architecture
45.URL Shortener: Deep Dives, Data Models, and Schemas
46.URL Shortener: Failure Modes, Interview Questions, and Runbooks

Real-Time Collaborative Document Editing

47.Collaborative Editing: Framing, Scale Math, and Architecture
48.Collaborative Editing: Deep Dives, Peritext, and Data Models
49.Collaborative Editing: Failure Modes, Interview Questions, and Runbooks

Interview Mastery and the Staff Evaluator

50.Pacing the 45-Minute Staff Interview
51.What Interviewers Are Actually Evaluating
52.Controversial Opinions: Greatest Hits
53.Coming in Volume 2: Advanced Infrastructure and the Full Playbook Syllabus

Home/Staff Engineer System Design/Flash Sales and High-Contention Inventory

Flash Sales and High-Contention Inventory

Production System Blueprint 3: Virtual Waiting Rooms, Distributed Inventory Locking, and Anti-Bot Defense

3 lessons

11.Flash Sales and Inventory: Framing, Scale Math, and Architecture
12.Flash Sales and Inventory: Reservation Engine, Anti-Bot Defense, and Deep Dives
13.Flash Sales and Inventory: Interview Calibration, Opinions, and Runbooks

© 2026 codeloopback