r/SystemDesignConcepts is a subreddit with 12k members. The most common kinds of discussions are solution requests and pain & anger, and the community frequently discusses system design, caching, database, microservices, and scaling.
This community is about sharing concepts and ideas about system designs of digital applications.
Popular Themes in r/SystemDesignConcepts
#1
Solution Requests
: "[D]ML system design resources for interview (senior/staff level)."
11 posts
#2
Pain & Anger
: "New System Design Problem: Stock Exchange"
7 posts
#3
Advice Requests
: "Introduction to System Design"
6 posts
#4
Self-Promotion
: "I hired 100+ engineers and got tired of gatekeeping - Sharing my complete System Design prep materials for FREE"
4 posts
#5
Opportunities
: "Re-evaluating Fan-Out-on-Write vs. Fan-Out-on-Read Under Celebrity Traffic Spikes (2025)"
1 post
Popular Topics in r/SystemDesignConcepts
#1
System Design
: "I hired 100+ engineers and got tired of gatekeeping - Sharing my complete System Design prep materials for FREE"
78 posts
#2
Caching
: "What is Caching?"
8 posts
#3
Database
: "Tumblr Shares Database Migration Strategy With 60+ Billion Rows"
8 posts
#4
Microservices
5 posts
#5
Scaling
: "The Differences Between Horizontal and Vertical Scaling: What You Need to Know | System Design"
5 posts
#6
Scalability
4 posts
#7
Github
: "System design cheatsheet - Github"
3 posts
#8
Low Level Design
2 posts
#9
Algorithm
: "Algorithm for Assigning Flights to Planes"
2 posts
#10
Local
2 posts
Member Growth in r/SystemDesignConcepts
Yearly
+2k members(19.1%)
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Last updated: October 1, 2026