This project seems to be right inline with my expertise! My day job is actually managing (and extending) an inventory management system, with user chat, written in Symfony2 and utilizing Doctrine and Twig. I am very familiar with the programming techniques of Symfony2 and think this project would be perfect for me.
I have been a back-end developer for over 10 years now, specializing in PHP, MySQL, and a variety of JavaScript libraries (Angular, Node, jQuery, etc.) The company I work for now is backed by one of the largest car dealerships in the St. Louis (MO, USA) area and the ultimate plan is to be a huge company. My previous employer was actually a Fortune 500 company. Therefore, I am not afraid of big projects or high demands.
I'd love to discuss the project details further with you so I can get a better understanding of the full scope of work and can adjust my bid accordingly. Also, my bid is always negotiable and I will be more than happy to work with your budget, if at all possible.
I hope to hear from you soon.