"Hi, I looked at your description carefully and I am very interested in providing my skills in hopes of working with you. I have ample experience in mobile app development.
-develop front-end using react-native
-develop back-end using Java Spring, Asp.net and PHP
-develop RESTful API using Express Js and MongoDB
-Integrate AWS.
I have just completed the same project.
Please feel free to contact me if you have any further questions. I look forward to hearing back from you.
Thank you!"