> Cross compiled applications for POS devices on Linux> Created drivers for various peripherals, such as Ethernet, GPRS, and WiFi> Remote debugged payment applications on POS terminals in Eclipse and Visual Studio Code> Developed an EMV application on Ingenico and Newland Linux POS terminals for Fibabank in Turkey> Managed the team to develop the EMV application> Developed purchase, void, refund, pre-authorization, and mail-order transactions> Developed transactions across contact, contactless, mag stripe, and manual card entry modes> Created a straightforward switch application using Golang to handle POS requests following the iso8583 standard> Developed a backend service using Golang for order history within the Cryptom application which is a web-based platform for digital currency> Dockerized Kafka, MongoDB, Redis, and our service for seamless communication between them

> Designed and implemented transactions utilizing QR code technology on Verifone POS devices> Developed purchase, void, and refund transactions

> Developed payment applications using C/C++ on Linux operating system for different POS brands> Designed and implemented multithreaded and client/server applications> Developed drivers for different peripherals including Ethernet, GPRS, WiFi, USB, and UART> Cross compiled applications to POS terminals on Linux and Windows

> Designed digital signage hardware system using Raspberry Pi board> Developed the application of the digital signage device using C/C++> Developed codes for several peripherals including Ethernet, Bluetooth, micro-USB, HDMI, and GPIO> Partitioned TV screen by the application and displayed different advertisement contents

> Developed a customized distribution of Linux operating system> Developed drivers, security modules, and logging systems for Linux> Developed a PAM based application for secure login to Linux using USB hardware token> Cross compiled and tested different customized Linux kernels

> Designed an ASIC for a VOIP processor (VOIP gateway)> Integrated different IP cores including MIPS processor, PSTN frame buffer, AMBA bus, and MAC> Designed multi clock domains and low power systems> Prototyped with Cyclone III and Stratix II FPGAs

> Designed a full 5-stage pipelined MIPS processor> Designed a VOIP processor from SystemC modeling down to RTL and FPGA implementation> Designed AMBA AHB and APB buses and their master/slave interfaces> Ported TCP/IP protocol and voice encoder/decoder (with G726 standard) on the MIPS processor