There are 6821 companies in Central and Eastern Europe that offer custom application development services to the Western European markets.
Each domain (industry, vertical, etc.) has specific challenges, needs and requirements on software development and its contributors.
Finding and qualifying those services companies based on CVs of their engineers is obvious and very easy to do. Unfortunately, CVs tell you nothing about the success of a cooperation.
Download the top 9 non-skillset-based things you have to take into consideration.