To test various methods, such as the list of vacancies, without aid of developers, we created automatically generated sandbox for API.
The intelligent system of notifications sending via VK.com API queues, handling exceptions limits of social network.
Full functional testing (Selenium) and automatic testing on Behat/Mink was used to ensure the quality.
A widget for employing companies websites was developed. The widget shows your friends who is working for this company, allows to ask their opinion about the employer and to ask for references.