Notes
Notes
Deep-dive series on systems, infrastructure, and engineering craft.
0/423 chapters · Curious · 0 XP
A guided route, start to mastery
Four levels, in order. Follow the line top to bottom — or jump anywhere you like.
Level 1 beginner
Fundamentals
How systems talk, store data, and move bits across the network — the bedrock everything else builds on.
6 tracks · 21h
Level 2 intermediate
Build & Ship
Write the services and interfaces people actually use — languages, and the APIs that connect them.
7 tracks · 20h
Level 3 advanced
Operate & Scale
Run it in production: infrastructure, data at scale, and growing horizontally without falling over.
22 tracks · 30h
- Linux / VPS 13 · 3h
- Web Servers 11 · 2h
- TLS & Certs 9 · 2h
- DevOps 8 · 2h
- Containers 6 · 52m
- Orchestration 6 · 54m
- IaC 5 · 45m
- Data Modeling 11 · 2h
- NoSQL 9 · 2h
- Auth & Security 8 · 1h
- API Gateway 7 · 1h
- Caching 11 · 2h
- Redis 10 · 2h
- Background Jobs 7 · 58m
- Messaging 6 · 57m
- Event-Driven 6 · 54m
- Storage 6 · 50m
- Search 6 · 54m
- Load Balancing 7 · 58m
- Horizontal Scaling 6 · 47m
- Replication & Sharding 6 · 53m
- Distributed Systems 10 · 2h
Level 4 mastery
Mastery
Keep it reliable and secure under real-world pressure — the work that separates seniors from the rest.
9 tracks · 21h