I wrote this FAANG interview guide a while ago after doing the LC grind and interviewing a bunch of places. I email it to people when they ask me about getting into FAANG. Note that Blind, while useful, is very toxic:

0. Total Compensation (TC) Salary comparison site: https://www.levels.fyi/ Anonymous posting with verified employees: https://www.teamblind.com/

These are the best tools for finding out what compensation actually is at these places. I know enough people in these companies to know these numbers are accurate. Keep in mind these numbers often include stock appreciation. You can filter to new offers to get numbers that exclude stock appreciation.

1. Leetcode (LC)

FAANG+ interviews always involve solving programming problems in real time. The best place to practice is Leetcode.

Buy a yearlong Leetcode premium subscription and do all the modules listed here, in no particular order, but skip decision trees and machine learning: https://leetcode.com/explore/learn/

When you are done with that, do all the problems on this list: https://www.teamblind.com/post/New-Year-Gift---Curated-List-...

A lot of these problems are on the modules linked previously, so you will only have 30-40 new problems here

Next, do random problems until you "see through the matrix." Focus on medium level problems. Try to do something like 35% easy, 50% medium, 15% hard. If you can't find the optimal solution to a problem, "upsolve" by reading a bit of the solution and trying again. If you still can't get it, copy the code of the solution and study it. Then erase it and try to solve it from memory. Periodically go back over solved problems and re-solve them while taking notes. Your goal should be to solve two random LC mediums in ~35 minutes. Solve problems out loud to simulate communicating your thoughts to an interviewer.

Consider using Python as your interview language if you are comfortable enough with it. It's faster than Java for writing. Some places will have you run the code, others it will be a glorified whiteboard, so don't use the run button as a crutch. Around two weeks before your interview, start doing company tagged problems like: https://leetcode.com/company/doordash/

Start doing this part first and grind it hard. It might take 3 months, it might take a year. It takes as long as it takes until you think you can crush it.

2. System Design

The system design interview tests your ability to piece together components to build an entire product or feature. A typical question is something like "design a URL shortener that serves 1B requests per day." You will need to choose database/pubsub/caching technologies appropriate to the problem, describe DB schemas, caching strategies, partitioning/replication schemes, design APIs, etc.

For senior level roles, this will be the most important part of your interview as far as leveling. If you are shaky, they will downlevel. Buy DDIA: https://www.amazon.com/Designing-Data-Intensive-Applications...

Read it more than once.

These courses on educative.io are useful: