I like the idea but I think competition will be pretty tough if it's positioned as a tool you'd use during a live interview. There's a number of free collaborat

I like the idea but I think competition will be pretty tough if it's positioned as a tool you'd use during a live interview. There's a number of free collaborative code sharing sites out there that don't require the candidate to sign up or sign into anything and that could be good enough to do this style of interview. You basically share a link with them to get started. I've given lots of interviews through them where you share a ~100 line example and then you and a candidate go through it where it's positioned as a code review. They verbally chat about specific lines and can change the code as needed. This is the bare minimum you need to do this style of interview. The interview itself is synchronous since it's done over a video call (webcam only since the doc is collaborative). This way a conversation can happen naturally and the candidate isn't blocked or getting hung up on the tools around interacting with the code. 99% of the time is spent verbally chatting about the code. Now, if it's positioned as an asynchronous tool that someone can fill it on their own and you review it afterwards as if it were a submitted test result, that's interesting but I think you'll miss out on good live discussions this way and those discussions can really dictate being a hire or not. This is especially true for more junior or mid level roles where it's expected you'll be dropping lots of context specific hints to them such as "I like where you're going with this, based on that do you think there's an edge case waiting to happen on line 35?". You can have hints-as-a-feature for this tool but it would be generic hints.