Adnetwork maintenance and development

We need an experienced web developer to take care of one of our advertising networks. You will be receiving many tasks from small bugfixes to adding new features. This job listing covers following changes: - adding multlanguage support for the website and panels, - adding API access to publisher and advertiser panels, - adding possibility for bulk campaign management (pause/resume selected), - incorporating MaxMind fraud prevention api as well as their phone verification, - fixing not more than two bugs