Before diving into the selection process, consider the following tips. They will help you avoid mistakes and make the right choice.

1. Stick to onshore development (as locally as possible)
Because software development is rarely inexpensive, many small businesses try to save money by hiring offshore developers. Software developers from other countries can be experts in their field and provide high quality products. However, they often observe a different legislature, speak a different language, and live in a different time zone.

All of the above can make communication difficult. Meanwhile, if there are some complex disagreements, you don't have too much power over what the developer does in the other country.

By choosing a local developer, you get the opportunity to work with them in person, call them during business hours, and enjoy the benefits of regular communication that is essential for an agile methodology.

Important: If you choose a local company, this does not mean that it does not delegate some of its tasks to offshore developers. This should not be a problem since your contract is with an American company and they are responsible for the results.

2. Pay close attention to the website
Today the website is the business card of any company. Reputable software developers spend a significant amount of time polishing their websites. There you can find various information, from contact details to past projects.

If a website is difficult to navigate or contains incomplete or incorrect information, this should raise a red flag.

If a company is not serious about its digital image, it is unlikely that it will be able to provide excellent results in development. You can move on to the next candidate.

3. Check portfolio
Even if you decide to work with a new company, it should already have a portfolio. This portfolio should showcase previous work done by their developers. Feel free to ask as many questions as you like about previous projects. You can also request contacts of past clients.

Ideally, the company or freelance developers you choose should have experience working on projects similar to yours. Even the most skilled game app developer can struggle to work on invoicing software, and vice versa.

I am sure that this article https://binerals.com/blog/how-to-hire-developers-in-ukraine will help you make the right choice and give you a lot of useful information in this area.