Contact me if you are looking for someone to help you create that new must-have functionality for your project, or if you need someone to review and update the code of an existing module.

Backend tasks I have done for other projects:

• Communicate with some API, either REST or SOAP.
• Execute periodic tasks with Drupal CRON
• Modify Views and SearchAPI listing queries code.
• Update deprecated code and make it compatible with the latest Drupal releases
• Create or apply Drupal.org patches.
• Create custom modules. You can see some of the ones I have published in my Drupal.org profile.