Virtuemart (on Joomla) Post Migration Code Fix

We need a top notch expert in Virtuemart. We have many virtuemart/Joomla websites. The virtuemart/Joomla install worked before we migrated the website to a new server. This project is to fix and troubleshoot code for an existing live website that has Joomla and Virtuemart installed. Contractor/seller represents that he/she possesses the skills and abilities necessary to work as a team player. Contractor/Seller to do their own quality assurance tests on their own work prior to submitting it to Client/Seller as complete. Contractor/Seller will be allowed a maximum of three attempts at producing satisfactory (to us the Buyer/Client) content deliverable items. If, Contractor/Seller cannot produce satisfactory content deliverable by the initial deadline stated herein, the project will be cancelled. Healthy bonus incentives are offered if Contractor/Seller provides a satisfactory deliverable in 24 hours, before initial deadline and/or for great results. Client/Buyer will disperse bonus(es) that are commensurate with Contractor/Sellers ability to achieve the objective at Client/Buyers sole discretion (bonus(es) will be added to the monies paid to you upon receipt of the final deliverable and/or during project). All work deliverables will be the property of the Client/Buyer upon full payment to Contractor/Seller. Any further clarification of this project can be discussed on the message board. Deliverable is working ecommerce virtuemart module. Where a user can securely purchase products from the websites store, purchase memberships, and upgrade memberships. These are "get to know you projects" which may lead to many other projects (we have 30 now), depending on performance. Contractor/Seller must conduct his/herself in a professional manner and have excellent communication skills. We are looking to build long-term relationships with the Contractor/Seller as we would be an ongoing source of new projects for the right Contractor/Seller. Contractor/Seller must be able to start immediately and perform in a timely manner.