Hi backend/data structures developer here.
I've read your requirements and is interested in your project. Unless this is a contest then I didn’t read it because I don’t have to pay 10 cents to bid. bellow is an intro on my skills, but this is an automated message with only a generic price estimate. Message me with a hello and I'll write you my thoughts on your project
I can do mobile, web, software development or just about anything because I'm creative. Optimal use of my skills would be game engine and search engine. I've done a GPS app with offline map and movement lines drawn on map, see other people's movement line files, works on iPhone and android. That's just to give you an idea. I normally would want understand your business requirements because technical is just a means to an ends. I’ve also done UI, but so far just a restaurant app as that's different than finance UI which is really flashy, I’m not fancy