Ingenico i5100 Developer, Verifone OMNI&Vx, Hypercom (ICE, Optimum), Spectra (CREON, EON, T800), Pax 80&90. Knowledge (MSR, ECR, EMV, GPRS, WIFI, Serial Readers, and others). So many functions working already. I can work in half time and Weekends, with a detailed specifications. Best regards,