It's not unrealistic, I personally code on all these technologies (primarily on iOS and android native), but such engineer can be pretty costly and might not co

It's not unrealistic, I personally code on all these technologies (primarily on iOS and android native), but such engineer can be pretty costly and might not come on equity only easily. Minimum experience of such engineer should be 6 to 10 (I'm 10) and they are either working on a pretty niche good paying job or running their own stuff, or selling their services as outsourcing firm (I do this, and have team of 30 other developers also). Apart from this,even if you hire such engineer he would be able to do one piece only at a time and that's not good for today's time-to-market dynamics. Also, you've paid already good for MVP (did you hire a local US firm?), I do most of the MVPs under 10 K, and price increase only when functionality is large, you don't need to develop things from scratch these days. nevertheless, my best suggestion to you would be:- 1. Hire a person as CTO or Tech lead, who know 1 or 2 of technologies you're looking for, but may not necessarily do all the coding. 2. His KRAs should be architecture creation, leading everything tech at company, align business goals with tech. tasks, hire an execution engineering team, and get the stuff done by day to day management. 3. Allow him to vet and hire development agencies or teams, negotiate on deliverable while you give him a realistic budget, and then give him realistic development goals. One guy can't do it all (even if he knows it all), a whole team of mobile dev inhouse is more costly than hiring a developer agency (it should be a good one though) so decide accordingly. Feel free to ask me for any further discussion on topic, my site is http://www.agicent.com http://www.agicent.com.