The interview process begins with a recruiter phone screen, followed by a 45-minute on-site technical interview and a four-round technical interview loop.

The interview process is good; however, it appears the interviewers are more focused on coding fast and coding without bugs. It feels like a test of memorization skills rather than actual algorithms knowledge and a candidate's ability to solve a real engineering problem. They seem to be looking for canned solutions, and any out-of-the-box idea might be rejected.

I would say the Facebook hiring criteria would prefer younger coders, fresh out of college, who have practiced simple algorithms coding for about a year. Leetcode.com is their bible. Experienced engineers may not be favored if they haven't had time to practice coding exercises.

What feature do you want to add for Facebook?