Need iPhone developer, Fix Bugs

I need experienced iOS developers and long term partner ship. Job: 1. Fix bugs happened while reviewing for Apple. (the price according difficulty) 2. Upload the app to iTunes. Reasons for Rejection: 2.2: Apps that exhibit bugs will be rejected 2.3: Apps that do not perform as advertised by the developer will be rejected 2.2 We found that your app exhibited one or more bugs, when reviewed on iPhone 4 and iPad (3rd Gen) running iOS 5.1.1, on both Wi-Fi and cellular networks, which is not in compliance with the App Store Review Guidelines. When we launch your app, a blank screen is displayed and the content does not load. Please refer to the attached screenshot for more information. 2.3 Additionally, we found that your application is using Game Center Leaderboards and Achievements, however, you have not yet submitted all of them for review. It would be appropriate to submit the Game Center Leaderboards and Achievements for review. Please visit iTunes Connect, Manage Your Applications, then select your app and click on Manage Game Center to complete the Leaderboards and Achievements setup or to remove it. For discrete code-level questions, you may wish to consult with Apple Developer Technical Support. Please be sure to: - include the complete details of your rejection issues - prepare any symbolicated crash logs, screenshots, and steps to reproduce the issues for when the DTS engineer follows up. For information on how to symbolicate and read a crash log, please see Tech Note TN2151 Understanding and Analyzing iPhone OS Application Crash Reports. If you have difficulty reproducing this issue, please try testing the workflow as described in <[login to view URL]>Testing Workflow with Xcode's Archive feature".