-Development board and verification board circuit design.-Part selection.-Test report production.-Assist customers hardware design .-Vender coordination.-Internal information coordination.•Use tools：OrCad、PADS、Altium Designer.

The fourth job is as an senior electronic engineer at Turtlebeach -Wireless and wired mouse design (electronic part). -Assist with electronic problems in various stages of production and foundry. -Analyze the rationality of the direction of the foundry report. -PCB layout. -RFQ stage evaluation and cost estimation.•Co-design product：Roccat Kone XP、Roccat Kone XP Air、Roccat Burst Por Air、Roccat Kone Pro Air、Roccat Vulcan II Mini Air、Roccat Vulcan Pro.

The third job was as an senior electronic engineer at PRIMAX. -ODM Bluetooth Headphones (Apple). -Use Realtek Bluetooth chips to design TWS for OEM use. -Assist customers with product application problems. -The factory yield rate has increased from 75% to 90% because of the Sensor problem. -Failure analysis. -EMI/EMC problem analysis and solution.•Co-design product：Powerbeats Pro、Apple AirPods Max.

The second work in WELLBUYING, during which as an electronic engineer (deputy team leader) -New product design (electronic switch). -Customized module design (vehicle gear hardware, detail machine). -Assist to help with electronic problems in various stages of production at the factory. -Assist customers with product application problems. -PCB Layout. -Once assisted the company in establishing SMT production lines in China. -Failure analysis.•Co-design product：TS001、TS002、TS003、TS004、TS005、TS006、TS006A、RS006、5D001、5D002、MD001、MD001-1.