If you're currently in college and wish to get placed in a major tech giant like Amazon or Facebook:

Don't learn React.js, instead learn Linked lists.

Don't learn Flutter, instead learn Binary search trees.

Don't learn how to perform secure Authorization with JWTs, instead learn how to recursively reverse a singly linked list.

Don't learn how to build scalable and fault tolerant web servers, instead learn how to optimally inverse a binary search tree.

These big tech companies don't really care what real world development technologies you've mastered. Your competence in competitive programming and data structures is all that matters.

The system is screwed. Or atleast I am.