Had been working in different platforms, Windows based (PC Based: Windows 98, Windows Me, Windows XP, Windows Vista, Servers: Windows 2000, Windows 2003), POSIX (Linux: Redhat, Ubuntu, Solaris, HP-UX, AIX), AS400
Specialties: Credit card authorization modules (ISO8583, HSM). Card Management, Public Key Infrastructure, SmartCards (APDU, T1/T0, ATR, MF, DF, EF), ATM (NDC, DDC, state and screens)