Hi ,Client!
How are you?
I have read your job posting and very interesting.
I have extensive experience in developing a wide range of mobile software across platforms and genres.
Especially I have rich experience to development app such as social networking app, chatting app(video, audio, text ,group chat, sharing media), GPS,Blutooth,GoogleMap, webRTC and so on.
I have also strong skill and ability can develop dedicated web service using php and java.
I don't doubt that I can implement these skills into your requirements seamlessly and effectively.
I would be happy set up times to discuss with you about your project in detail.
Thank you for your time and consideration.
I look forward to hearing from you in the near future.
Sincerely