Development DBA needed for long term part-time work (MySQL 5.5 on Linux)

We are seeking a "development" DBA to help us tweak and tune our database use and schema architecture as we continue to scale our database size under application load. You will also be in charge of performing regular performance audits and analyzing slow query logs to spot areas of potential improvement and optimization. This position is considered a "development" DBA because we have the database server already on stable, high-end hardware and this instance has already been optimized by Percona. What we need is someone who can directly interface with development to implement query and schema optimization, and spot areas for data integrity and normalization improvement. You should have extensive development and DBA experience with MySQL 5.5, using InnoDB tables, which are hundreds of gigabytes in size and growing significantly everyday. Our platform utilizes LAMP technologies, so development experience using object-oriented PHP is a loose requirement. Broader experience with other database engines and technologies is a plus. If you think you are the perfect fit for this long-term, part-time position with a successful and growing American company, reply to this posting with: 1) Best time to contact you 2) Best way to contact you 3) A SQL query which results in the sum of thirty eight and thirty one. 4) Why you think you are better then all other applicants for this gig (be specific!) Thanks.