Proactive iOS developer with more than 5 years of experience in the IT Industry. Vitalii is an expert at applying his programming skills to solve complex challenges. Extensive experience in programming using Swift, Objective-C, Core Data and CocaPods. Extensive software development experience. He is able to work in extreme situations, and also is not afraid to make decisions and take the initiative. One of my unique experiences working in IOS was developing a custom keyboard extension. Due to the fact, that it is not a simple trivial application, during all development it makes you think not only what instruments to use while developing, but also how many resources it can consume. Custom Keyboard Extension is very limited when it comes to memory usage. On my side a lot of work has been done to make the application consume memory as less as possible, I have improved its performance and made it more responsive to the end user.