“Sergey has been a pleasure to work with. He was the lead developer on our project and helped us take our concept though design, development, and QA phases to a marketable product. He has a great depth of knowledge in PHP. Symfony, job queues, and overall systems architecture. We were always amazed at how quickly and accurately Sergey turned our feature requests into functioning code. He has strong written and spoken English language skills and a good sense of humor. He is a good communicator. We would happily hire Sergey again for our next big project.”