Add features to an existing Drupal 7 module

We have an existing custom Drupal 7 module which needs some modifications done on. You have to have extensive knowledge in building Drupal modules and PHP and MYSQL and you will be asked questions to prove it during the interview. Once hired you will only have a few days (2-3) to complete the tasks so don't apply if you don't have time to work on it. IMPORTANT: 1. Don't bid over a 60$ this is a small project 2. We are not hiring agencies only private freelancers so don't waste your time applying. FOLLOW THE GUIDELINES OR YOU BID WILL BE AUTOMATICALLY REJECTED