Responsible : Optimized battery life experience, including charging and power consumption. Identified, triaged, and fixed power issues on Pixel devices. Developed charger, fuel gauge driver or power management IC integration and maintenance. Project : 1. Pixel4a Debugged battery drained issues on VZW DoU test. Debugged battery drained issues on USCC Spirent test. 2. Power Bugbot Parsed useful information from bug report automatically to reduce triage effort. Collected battery life related log patterns and setted trigger criteria.

Responsible : Developed embedded systems using RTOS. Maintained the existing firmware and performed changes based on the requirements. Project : 1. Electric vehicle : 7.2kW on-board charger Prototyping Implemented the time sequence, PLL, OCP, OVP and OTP function of PFC. Performed device driver development for output voltage and current feedback control. Developed EV CAN bus GUI with VB to generate control pilot signals to communicate with the OBC charger. Developed instrument control software with C#. 2. Smart lighting : 36W LED driver MP stage Developed LED driver control gear for LED lamps in compliance with IEC 62386 standard and DiiA specifications. Tested and debugged LED drivers with scope and ProbitLab2 to achieve DALI-2 certification. Corrected calibration parameters of output voltage and current. Trained factory engineers how to do DALI function test. Developed testing jig included seven segment display driver and DALI communication protocol for customer to set maximum output current. 3. Electric vehicle : 2.2kW bi-directional DC/DC power module Prototyping Performed device driver development for ADC, GPIO, KBI and fan control driver. Verified hardware OCP and OVP functions with checking warning code. Leave reason : I landed a higher paying job.

Responsible : Developed 36W drone adaptor and 10W mobile phone charger MP stage with flyback topology. Initiated new design production in coordination with suppliers and customers. Generated product specifications in consultation with customers. Monitored electrical components to ensure optimal performance. Provided schematics and technical support to PCB layout design teams. Oversaw production design to ensure quality improvement and cost reduction. Leave reason : I am leaving because I want to make a career change from my current position to a different one.

Responsible : Tested server Linux/Windows for integration and stability. Created test cases, test plans, deployed server testing documents. Prepared and submitted product test status and defect reports. Utilized different tools to analyze log, and supported RD to track the defect. Developed automation testing tools with Python. Leave reason : I decided to go back to school for my master's degree.