- Databases - https://edstem.org/us/courses/47527/lessons
- AI - https://edstem.org/us/courses/46010/lessons
- Algo - https://edstem.org/us/courses/47529/lessons
- OS - https://edstem.org/us/courses/46014/lessons
- AOS - https://edstem.org/us/courses/47520/lessons
- Security - https://edstem.org/us/courses/46012/lessons
- System design primer - https://github.com/donnemartin/system-design-primer
- ByteByteGo - https://bytebytego.com/
- System design school - https://systemdesignschool.io/primer
- Tech interview handbook - https://www.techinterviewhandbook.org/
- Neetcode - https://neetcode.io/practice
- The Log - What every software engineer should know about real-time data's unifying abstraction (all about Logging) - https://engineering.linkedin.com/distributed-systems/log-what-every-software-engineer-should-know-about-real-time-datas-unifying