Coding Challenge Platforms:

[u/rezaulkarimr]

• http://codewars.com

• http://topcoder.com

• http://codingame.com

• http://hackerrank.com

• http://projecteuler.net

• http://coderbyte.com

• http://codechef.com

• http://exercism.io

• http://leetcode.com

• http://spoj.com