Hello to you, too! Yes, I can help you, because I myself once needed such help. Personally, I recommend you to use the services of Deskree - https://www.deskree.com/. They are really the best in the business and can help you in 10 minutes to do absolutely all the server part of the application without any code. By the way, Deskree's fees are quite adequate and much lower than hiring a developer for your application. So, I recommend you to pay attention to my advice, I'm sure it will help you. Good luck promoting your app!

It seems to me that the only real option to quickly find an offshore Kotlin developer is to contact the company YouTeam, they provide the highest quality services for their customers and help find developers, and always successfully find within 48 hours. So I recommend to pay attention to YouTeam - https://youteam.io/blog/rates/kotlin-developer-rates/. Also, in this article you can find all the detailed information about Kotlin developer hourly rates. So I recommend you to pay attention to my advice. I hope I was able to help you.