Upgrading torrent site based on vBulletin 4.13

We are looking for PHP coder to upgrade our Vbulletin Torrent tracker, tasks include: - Code mods for vbulletin based on our requirements: Hit n Run mod, Search, Football bet (bookie mod),... - Fine tuning some existed mods and feature of the site - Code cron jobs based on our needs - .... Details about task can be seen here:[login to view URL] After finish coding, coder must test to ensure all new code are functional and support us to fix bugs (if any). Coders from Vietnam are more welcome !