BCash is the Bitcoin Cash implementation https://purse.io uses internally at the moment. They're not ready for the may hf right now!

The JS developer should have a good amount of experience in working on js projects and be able to show that by e.g. having a public github profile demonstrating his past work (or other references).

The dev should be willing to participate and take responsibilities for the project and contact Mark Tyneway for this on some channel where it can be publicly verified that he did.

To receive this reward it is important that a capable JS dev tried to get into BCash development not that he actually gets accepted by the BCash team. If he tried and it is obvious that he wanted and was capable to but they didn't let him, this reward will still be granted.

See this video (from 6:40 on) for more details: https://youtu.be/KZD6NUgQuV4?t=399