As per my understanding you are looking for a Drupal 7 Expert who can develop a custom module for you.
As a Drupal Expert,I can customize its any kind of an existing as well as custom develop modules, plugins,services, REST API functionality as per the requirement.
Currently i am working on its latest D8 /D7 version & have also worked on its other versions such as D5,D6,D7 and D8.
I have worked extensively with Drupal,Twig,PHP,MySQL,HTML,CSS,Javascript,jQuery,Ajax both in Linux & Windows Environment.
Please give me an opportunity to show our expertise in the same.