PHP + Flex - Migrate SQLite to MySQL

Seeking experience PHP+Flex Coder to handle the following 1. Bug Fixing - Not sending notification email on successful transaction - Not saving transaction status to database upon successful paypal payment - Directed to wrong return page 2. Migrate from SQLite to MySQL i. Modify PHP scripts & Flex Objects to save data to MySQL ii. Improve the database structure for faster and more efficient data query, inserting and processing. iii. Optimise database query handling to improve database response time. iv. Setup daily backup routine of the database. Bidder must have past experience with Flex and SQLite. Access to review the data file and dev site will be provided to shortlisted bidders.