Do you know whether Ukraine is a trusted outsourcing destination?

Yes, that`s true. Ukraine is amongst the topmost trusted outsourcing destinations worldwide. This was also proved in the recent Global Outsourcing 100® rating by IAOP, where 18 positions out of a hundred were taken by Ukrainian IT companies. So, if you searching for outsourcing companies of Ukrainian origin or those who have offices within the country, you should read this article https://idapgroup.com/blog/software-development-outsourcing-companies-in-ukraine/ 

According to the Outsourcing Journal, Ukraine is now the number 1 digital, technology. But I'm just a seller and I don't understand anything

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Wow! very helpful information thanks for sharing!   www.cabinetsoxnardca.com

Don't know about whole Ukraine but my partners from there  https://itmaster-soft.com/ are great!

I can recommend this firma, i hired from them angular developer who was indeed very experienced and at fair rate.