What kind of developer am I looking for?

I’m looking for a starting point in a search for a designer / development team for an ANDROID app.

I’d like to create an app that uses an “elastic band” type effect similar to how the slingshot in Angry Birds gets pulled back by the user, taking into account the initial tension, and then once it’s released, the physics of the rebound are lifelike and wobble relative to the release velocity.

I’m looking for a developer and I don’t know what kind of developer. Someone who uses Unity? Something else? Where should I start with my search?