Your job is to spam proof an installation of phpBB3 forum software. You will be given SFTP access to the server to the installation directory of the phpBB3, as well as administrator access to the phpBB3 software itself.
This is a high traffic website which gets a lot of attention from spam robots. We are currently using regular CAPTCHA but spam robots can still register to the forum and post spam. The spam proofing must include at least improving the registration page of the forum to contain a better spam bot detection code, as well as some tools to detect and remove the spam sending users who are already registered.
Only make the bid if you can do this right now.