1.Experienced in digital circuitry design and review, such as DC-DC Converter, Fan Board control, PCIE, I2C, UART, SPI, JTAG, USB…etc.  2.Familiar with the PCB design tool (Cadence Allegro/ORCAD) to generate schematic and essential information. 3.Basic knowledge of CPU internal structure, FPGA/CPLD, and digital logic circuitry ( ip- op, latch, counter, shift register...etc.).  4.Collaborating with the cross function team (SI, Layout, FPGA, Software…etc.) and vendor to clarify the issue of product, come out with the solution and make it satisfying the requirement from customer.