Leet Code https://leetcode.com/discuss/general-discussion/460599/blind-75-leetcode-questions Technical Interview Guide https://www.techinterviewhandbook.org/software-engineering-interview-guide/ Designing data intensive applications https://github.com/lafengnan/ebooks-1/blob/master/Designing%20Data%20Intensive%20Applications.pdf System design primer https://github.com/donnemartin/system-design-primer