Need to extend functionality for existing iOS app and web potion

In order to work on this project, below is the necessary skillsets. 1) Need to know how to work on Yii framework The web potion is developed using Yii framework. Developer need to work on the existing source code to extend the functionality required in this project 2) Need to know how to create the necessary API (web service) needed by the iOS native app for this project An example of an existing web service created, please see [login to view URL] 3) Need to know how to work on existing iOS native app to extend the functionality required in this project 4) Backend database used is mysql. Project background Business workflow: 1) Company delivered cylinders to client. 2) client rent the cylinders until they are done using the cylinders. 3) Company then collect back cylinders after client are done using the cylinders. This project deal with point 3 only. Point 1 and 2 is done. Some shortform that i used that you might want to take note: 1) DO = Delivery order 2) ECR = Empty cylinder report The iphone app can only connect to the backend server when there is a wireless connection. And this only happen during when the driver is still in the factory. Once they leave the factory, there is no more connection to the backend server. Please see "Business [login to view URL]" to have a better understanding when a connection to the backend server is available. Please review both the worksheet as it indicate my driver entire itinerary. If you have the necessary skillsets and after reviewing my requirements and are keen to work on my project, please place a bid amount and the duration needed to work on this project. And if you have any questions, please also let me know. I will reply you accordingly. I will also send you my existing iOS source code and the web source code for your final review. And if there is no issue, i can award you the project. NOTE: If there is any question or doubt, this will need to be addressed before the project is awarded to you. Once awarded, development will start immediately. I am not expecting to discuss in detail only after project is awarded. You need to get the needed details and understand the project requirement before project is awarded to you. Thanks.