Devloper Open Source php CRM some changes and adding order management

Dear Developers, looking for developers who have knowledge about Project management (Gantt Chart)& CRM developers. Two main subjects I would like make changes over php base opensource CRM&Project Management tool. 1- Currently the system is using open source Gantt View " [login to view URL] " i would like to change it and use another 3rd part open source Gantt Chart " [login to view URL] instate of [login to view URL] 2- Adding CRM order management system which contains " products, categories subcategories, orders" a- Add new Products, Edit Delete, Add picture related to the category, list of products, search etc actions. like all online shopping backend pages. b-Clients already have own login panel and they can see all statue of the project, invoice etc So, i would like to get my clients to see my added product and make an order like add shopping basket and complete order and see my last order etc. It is similar as online shopping. c- When the client and admin access from a mobile device, the system should popup modal with the big icon and simply if clients login making order quickly, if admin and staff access they can also make a create order for some else. So more simple means having a shortcut with big icons to use order management part. d- Already has privileges and roles for staff and clients, so should be added list of privileges which developed order management too. A few roles have to be considered during the development. - Considering respect MVC no spaghetti code. - Considering the interface template responsive Mobile template attributes should be used for the interface(Bootstrap already) - Publishes will be made a real-time server, not the local server on the selected milestone. - Guaranty for bugs(philosophy is no bugs, no problem:) ) You can send a proposal for developing only title 1 or title 2. We will discuss the details. Regards