Worked on SSL, RSA, DES for at least six months to one year. Worked with QT (version 4.3 or above) programming Language for at least six months to one year. Worked/exposed to protocol like ISO-7816 specs and EMV level 1 and level2 topology. Familiar with communication protocols like PPP-gprs, PPP-cdma . Familiar with IPC concepts and Posix concepts. Good knowledge about Linux Operating System concepts. Preparing and Understanding of Use cases for User scenarios.