Audit & In-App Chat Implementation

I need an experienced full-stack engineer to jump in for one intense week, evaluate everything we have, and get our web + mobile app ready for release. The stack is largely HTML and PHP, and you will have three developers under you to execute fixes and features while you focus on the bigger picture... (Budget: $750 - $1500 USD, Jobs: Android, Full Stack Development, HTML, JavaScript, Mobile App Development, PHP, Project Management, Web Development)