The Best Coding Platforms to Challenge Yourself in 2021

There are more types of technical roles for software developers these days than ever before. Programming languages are changing, frameworks are evolving/emerging, and new technologies are continuously appearing. We are officially in a vibrant ecosystem! We all know this!


If that’s the case, developers or beginners who want to get ahead must
routinely test and improve their skills.
Because of this, I have put together the following list of platforms where you can level up your skills for any number of roles, from machine learning to development operations.

1. Coderbyte

Coderbyte is a platform that offers hundreds of challenges that you can solve in an online code editor using more than 10 different programming languages. After testing yourself on specific challenges, you can look out through the solutions of over 1.5 million users and read articles on how to solve problems on the platform more efficiently. Apart from all these, Coderbyte is also recommended by the best coding training camps and companies due to the interview preparation challenge collection.

2. HackerRank

HackerRank has a large collection of challenges for a lot of different
domains such as algorithms, mathematics, data structures, bash scripting, SQL, functional programming, artificial intelligence, and more.
If you already know the basics of some programming language or if you
want to challenge yourself about more complex problems you can use
hackerRank, it would be a perfect choice for you. The challenges presented with mathematical notations can be a little confusing at first sight, it might not be a good choice for newbie developers.
HackerRank also offers the ability for users to submit applications and
apply to jobs by solving company-sponsored coding challenges.

3. TopCoder

TopCoder is one of the great platforms for lovers of competitive
programming. It provides a list of algorithmic challenges from past
competitions that you can complete online on your own using code editors.
The top-ranked users on TopCoder are very competitive programmers and regularly compete in programming competitions. The top-ranked
programmer maintains his blog called Algorithms, where he writes about coding competitions, algorithms, math, and more.

4. ProjectEuler

Project Euler is a series of challenging mathematical/computer
programming problems that will require more than just mathematical
insights to solve. It contains an amount collection of challenges in computer science and mathematics. The challenges typically involve writing a small program to figure out the solution to a clever mathematical formula or equation, such as finding the sum of digits of all numbers preceding each number in a series. Although mathematics will help you arrive at elegant and efficient methods, the use of a computer and programming skills will be required to solve most problems.


In ProjectEuler challenges, you cannot directly code on the website in an online editor, so you would need to write a solution on your own computer and then provide the solution on their website.

5. freeCodeCamp

freeCodeCamp is a perfect choice for beginners who are just getting into
coding. They offer all sorts of resources on learning syntax, practicing
coding, building projects, and preparing for interviews. They don’t have as many interactive coding challenges as other challenge platforms, but
freeCodeCamp offers some fun challenges and interview preparation for
beginners learning JavaScript programming language.
With freeCodeCamp, you can get certified for multiple 21st-century skills such as responsive web design, JavaScript algorithms, Python algorithms, data structures, front end libs, data visualization, APIs and microservices, and machine learning.

Other useful platforms you might want to check out:
– AlgoExpert
– LeetCode
– CodeWars
– Exercism.io
– Edabit
– Advent of Code


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