We have more than 10 years of experience in software testing. Organizing the QA process on a large scale, QA related course, Outsource Testing service. We have a deep understanding of the testing process, techniques, and approaches. We know how to ensure correctness, consistency, and completeness of data in the whole data flow pipeline from storage to the user-facing interface. We are testing high load systems with more than 1 mln request per sec. Our main working stack: Functional testing, Performance testing (Load, Capacity, Stress), Integration and system testing including automation in CI environment, Security/penetration testing, Big data testing, blockchain-based application testing.