I built a Github Hireable (https://developer-hireable.firebaseapp.com/) here, which allows people to search Github usernames and figure out whether they are available for hire or not.
Do let me know if you guys find it useful. I would like to know about your feedback on the product. Do let me know if you are looking for any specific features. More than happy to collaborate on this one.
Source Code - https://github.com/sudarsangp/developer-hireable
Sample UI from Github Hireable