# Peer System Design Library

Browse system design solutions submitted by the community. Share your own designs and learn from others.

###### Share Your Design

## Design Projects

### Design a Notification Service

- by UnderlyingApricotGoldfish326
- 395 bookmarks
- 47 comments

### Design an Online Game Leaderboard

- by Itai Noam
- 268 bookmarks
- 103 comments

### Design a Log Aggregation Service

- by Manasi
- 202 bookmarks
- 50 comments

### Design a Notification System

- by Akshay
- 196 bookmarks
- 74 comments

### Design a Top-K System

- by Itai Noam
- 135 bookmarks
- 23 comments

### Design a Review App for Food Items

- by Viswa
- 122 bookmarks
- 15 comments

### Design a System Metrics Monitoring and Alerting Platform

- by MagicBeigeCobra881
- 115 bookmarks
- 46 comments

### Design a Global URL Blocking System

- by Alex Ilyenko
- 102 bookmarks
- 44 comments

### Design a Donations Website

- by Manasi
- 99 bookmarks
- 42 comments

### Design a Logger System

- by CasualScarletPelican829
- 90 bookmarks
- 126 comments

### Design Recommender System

- by ExtraApricotSloth487
- 85 bookmarks
- 17 comments

### Design DoorDash

- by Vardhan
- 79 bookmarks
- 17 comments

### Design a Webhook Callback System

- by BrainyBrownGull547
- 77 bookmarks
- 16 comments

### Design Top K Songs Widget for Spotify

- by Itai Noam
- 69 bookmarks
- 54 comments

### Design a Reservation System for Airbnb

- by ElderlyHarlequinMongoose590
- 67 bookmarks
- 30 comments

### Design a Book Seller Platform

- by DominantScarletBoa987
- 63 bookmarks
- 20 comments

### Design a Calendar System

- by VoluntarySalmonCondor836
- 60 bookmarks
- 102 comments

### Design Online Chess

- by SurprisingSapphireIguana142
- 57 bookmarks
- 36 comments

### Design a Web Crawler with Limited Communication

- by Itai Noam
- 57 bookmarks
- 11 comments

### Design ChatGPT

- by asterp
- 56 bookmarks
- 28 comments

### Design a Key-Value Store

- by Anushree Naik
- 52 bookmarks
- 64 comments

### Design a Hotel Booking System

- by OpenAmaranthGull178
- 51 bookmarks
- 24 comments

### Design a Driver Heatmap System

- by Abhishek Athreya
- 51 bookmarks
- 85 comments

### Design a Malicious IP Detection System

- by VoluntarySalmonCondor836
- 51 bookmarks
- 48 comments

---

Peer System Design Submissions | Hello Interview