If you're a beginner, starting with the fundamentals of frontend development. Android developers from the Computools team have done many large-scale projects for my business, which are implemented in Java and Kotlin. For example, currently Android programmers are creating an extension for me to identify users using artificial intelligence, biometrics, and behavioral factors. For 7 years they have been creating iOS applications for us using Objective C, Swift, C ++. I am sure that we will continue our cooperation for a long time, so I can confidently recommend the Computools team to you.