Upgrade

Data structure and algorithms:
  1. https://classroom.udacity.com/courses/ud513
  2. https://techdevguide.withgoogle.com/paths/data-structures-and-algorithms/
  3. Algorithms and Data Structures - Full Course for Beginners from Treehouse
  4. Data Structures Easy to Advanced Course - Full Tutorial from a Google Engineer
  5. Data Structures from HackerRank
  6. Algorithms from HackerRank
Interview Prep:
  1. https://techdevguide.withgoogle.com/paths/interview/
Visualize logic:
  1. https://visualgo.net/en
  2. https://www.toptal.com/developers/sorting-algorithms
  3. https://algorithm-visualizer.org/
CS:
  1. https://cs50.harvard.edu/x/2021/
  2. Computer Systems Security (MIT open courseware)
  3. Intro to algorithms (MIT open courseware)
  1. https://reactday.in/jobs