So the main way is to help out with the API if that is your expertise. Alternatively, if you'd like to dive in React, then there is a lot of work to do! github.com/esfiddle/site
The main thing on the site is to start work on the editor page. It should work similar to esfiddle.net! Let me know if you need any more help. Any thing you can do would be a massive help! :)
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