Hi Ben,
good luck.
1. I work with numerous software development companies - from all over the world - India, Ukraine, Israel... - so I'm happy to connect you with one if you need. It all depends on the project and your (or your client's) budget.
2. Three very important points:
A) Be very clear about what you're paying for/what you're getting - in regards to specifications of the project. in 9/10 cases people overlook things.
B) Make sure that you have a signed development agreement both with your customers, and the development company [I can draft this for you if you need]
C) DO NOT pay too much upfront - only pay after each stage / milestone has been completed - and always leave at least 20% for until about 60 days after the project is completed and the support period has ended.
Good luck
I've successfully helped over 350 entrepreneurs, startups and businesses, and I would be happy to help you. After scheduling a call, please send me some background information so that I can prepare in advance - thus giving you maximum value for your money. Take a look at the great reviews I’ve received: https://clarity.fm/assafben-david