Sir,
I am an experienced web android developer and would like to apply for this project. I have experience working as a web developer in my home country and would like to lend my skills on an international level and that is why I am applying for this job. I am quite familiar with writing server side code with PHP and building API-s. I have experience connecting to Facebook, Firebase and Maps API and also my own made API.
I promise that I will provide with the best services well within your budget and exceed your expectation. Looking forward to continue this conversation. Here are some links to my work.