Senior Firmware Engineer

China April 16, 2026 Full Time
Job location:
Shenzhen, China

About the role:
As a Senior Firmware Engineer at Sun King, you will play a key role in building inverter platforms and developing inverter software solutions. This position requires deep technical expertise in embedded systems and hands-on experience with inverter technologies.

What you will be expected to do

  • Design and develop low-level drivers for embedded software (e.g., UART, ADC, SPI, I2C, DMA, PWM, SPWM, SVPWM, RTC, IAP, LCD).
  • Develop embedded applications, including:
    • Inverter control software
    • Lithium battery charge/discharge management
    • MCU low-power management
    • HMI (Human-Machine Interface) management
    • Device status and data management
  • Maintain and debug embedded products, diagnose and resolve technical issues, and optimize product design.
  • Prepare and maintain comprehensive software design documentation

You might be a strong candidate if you have/are

  • Bachelor’s degree or higher in Computer Science, Electronics, or Communications.
  • 6+ years of experience in embedded software development, minimum 3 years of hands-on experience in inverter development, with proven expertise in inverter software design (required). Experience developing inverters with a power rating above 1KW (preferred).
  • Strong proficiency in C programming, with solid coding practices and a strong foundation in software engineering.
  • Practical experience with STM32 and DSP platforms, and familiarity with mass-production design processes (required).
  • Skilled in low-level driver development, schematic reading, and  self-directed driver debugging.
  • Proficient in using oscilloscopes, logic analyzers, and multimeters.
  • Familiarity with version control and project management tools (e.g., SVN, GitHub, Bugzilla).
  • Fluent in English (reading, writing, listening, and speaking).
  • Strong problem-solving, learning, and communication skills, with a collaborative team mindset.

What Sun King offers

  • Professional growth in a dynamic, rapidly expanding, high-social-impact industry
  • An open-minded, collaborative culture made up of enthusiastic colleagues who are driven by the challenge of innovation towards profound impact on people and the planet.
  • A truly multicultural experience: you will have the chance to work with and learn from people from different geographies, nationalities, and backgrounds.
  • Structured, tailored learning and development programs that help you become a better leader, manager, and professional through the Sun King Center for Leadership.
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