Coding
- Leetcode: http://leetcode.com
- Neetcode: http://neetcode.io
- CCIC: http://amazon.com/Cracking-Coding-Interview-Programming-Questions/dp/0984782850/
SDI
- System Design Interview book 1, 2 by Alex Xu: Vol1: http://amazon.com/System-Design-Interview-insiders-Second/dp/B08CMF2CQF/ Vol2: http://amazon.com/System-Design-Interview-Insiders-Guide/dp/1736049119