Coding Platform like hackearth

I am looking for a freelancer to develop a coding platform similar to Hackerearth. The platform should support Python, Java, and C++ programming languages.

Features required for the platform include an online code editor, code compilation and execution, as well as user authentication and authorization.

Cloud based Product Development
Coding Platform ( plagiarism/ Video enabled ) along with Job portal development – Need more discussion on Backend & fronded language
Total development Cost – Base model + other costing ( with added features a , b, c )
Enhancing features and maintenance process 


I have a rough idea of the design for the platform, but I am open to suggestions from the freelancer.

Ideal skills and experience for the job include proficiency in Python, Java, and C++, as well as experience in developing coding platforms and implementing features such as an online code editor and user authentication.

Eg: https://www.hackerearth.com/
https://www.hackerrank.com/