SPOJ is running on Sphere Engine

created by Sphere Research Labs

Do you enjoy our Sphere Online Judge? We hope you do! But do you know that the tasks are designed and judged by Sphere Engine technology? Sphere Engine is an easy-to-use code compiler which can be also used in your scientific project or in your business. Imagine that you get all the SPOJ functionalities and many more!

Sphere Engine uses an unique compiling technology, tested on more than 100 million programmes executed by our compiler.

Sphere Engine can:

When you decide to integrate our API with your system you will not be left alone, we will provide you will all the support if necessary, our experienced team is here for you.


sphere-engine.com