As someone with over 4 years of experience in the Mobile App Development and Web Development field, I believe I am the ideal candidate for your project. My core skills include Android, iOS development and I'm well-versed in Javascript as well-rivaled combination for your precise requirement. In past assignments, I have worked on a multitude of projects involving JSON files and web views, similar to the one you have in mind.
One noteworthy project that aligns with your need is an application similar to Uber, that involved incorporating a module for tracking through GPS. It demanded effective handling of JSON files and adherence to device-specific nuances found in both Android and iOS platforms. This underpins my ability to fulfill your requirements astutely and error-free on both platforms.
Moreover, I'm no stranger to delivering quality work - on time! I've cultivated excellent problem-solving skills through my years of experience, which enable me to navigate complex tasks efficiently. Given a chance, I promise you will receive nothing but инenйitablebly proficient работа!"