Senior Drupal Developer needed for ongoing work

We are building a classified ads website based on Drupal7 and looking for a senior-level Freelance Drupal developer to work on numerous tasks, from solving issues and optimising performance to writing new modules adding custom features.

We are looking for 7+ years of commercial experience in:
- Drupal coding standards and in writing secure code
- Drupal Commerce
- Writing custom modules for Drupal 7
- Responsive front-end development; HTML, CSS3, JavaScript (including jQuery)
- PHP7 and in-depth knowledge of MySQL databases
- Debugging code, found and resolve issues and errors
- Performance optimisation and scalability
- Identifying conflicts in the programming logic and implement solutions
- BitBucket repository

This project is for ongoing Freelance work, based on an hourly rate and pays for hours billed.

Thank you