Jaroslav has a deep knowledge of low-level and high level programming languages. He is an expert in reverse engineering and has a detailed knowledge of Windows / Linux system architecture.
He is also a top specialist in architectural design and implementation of SAP systems. He has a knowledge of the OWASP Testing Guide, OSSTMM and a lot of experience in seeking vulnerabilities.
He is also focused on IT security research (smart card emulation via NFC phones).