From April 2016 to today, Lei Ji has served as the wireless product regional marketing manager in North China for Cypress Semiconductor. From April 2015 to the present,he has been an honorary advisor of Unicorn Team of Qihoo360. From May 2011 to April 2015, he was MCU and wireless connective (WCS) FAE at Texas Instruments Semiconductor Technologies(Shanghai) Co.,Ltd. Beijing Branch. His main duties and responsibilities included: supporting wireless customers in Northern & Western China from 2012 to 2015 and supporting MCU customers in Beijing and Northeastern China from 2011 to 2013. From June 2007 to May 2011, Lei was Chief Engineer at Beijing Shi Dai Jin Pu Technology development co., Ltd. His main duties and responsibilities included: leading WSN and automobile-electronic business as technical director, designing the firefighter monitor system project which is required by the Beijing Science and Technology Committee, and applying one patent about wireless sensor net.