Hello, I am very glad to see your project.
I've just read the provided description carefully and I'm convinced that my skills and knowledge are suitable for what you need.
I've worked on dozens of successful projects using technologies like J2EE, native Android, Ionic Framework, among others.
Could you see my profile ?, there you will find some sample about maps in apps
Please feel free to contact me so we can discuss how we could work together.
Thanks in advance!