Free Course — No signup required

Learn Scalable Architecture
in 5 Days

Design systems that handle millions of users. Cache intelligently. Balance load. Survive failures.

5 lessons
Self-paced
~60 min/day
Free forever
No account needed
Start Day 1 — Free → See what's covered
What you'll learn

System Design in 5 Days

Free 5-day system design course. Learn scalability, caching, databases, load balancing, and how to design real systems like Twitter and Uber.

  • Estimate scale requirements using back-of-envelope calculations
  • Choose between SQL and NoSQL databases for different workloads
  • Design caching layers with Redis that actually reduce DB load
  • Implement load balancing strategies for high availability
  • Design rate limiting, CDN, and message queue architectures
  • Walk through real system designs: URL shortener, Twitter feed, Uber
1M+
users/day
CAP
theorem
5
lessons
$0
cost
5-Day Curriculum

Every lesson has a real exercise.
No theory without practice.

01
Scalability Fundamentals
Vertical vs horizontal scaling, back-of-envelope math, CAP theorem
scalingCAP theoremestimation
→
02
Databases at Scale
SQL vs NoSQL, sharding, replication, indexing strategies
shardingreplicationindexing
→
03
Caching & CDN
Cache patterns, Redis, CDN, cache invalidation strategies
RedisCDNcache eviction
→
04
Load Balancing & Availability
Load balancers, failover, circuit breakers, rate limiting
load balancercircuit breakerrate limiting
→
05
Real System Case Studies
Design Twitter, URL shortener, Uber backend end-to-end
Twitter designURL shortenerUber
→
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Your instructor
B
Bo Peng
Founder, Precision AI Academy

Kaggle Top 200 data scientist. Trained 400+ professionals across universities and federal agencies. Built production systems at scale. This course is practical first — every lesson has code you can run and an exercise you can finish in under an hour.

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