Senior Firmware Engineer(BMS)

Employment: Permanent - Full Time Workplace: Onsite Job location: Shenzhen, China About the role: As a Senior Firmware Engineer, you will design, develop, and maintain software solutions for embedded systems in off-grid solar and residential energy storage products. You will collaborate with cross-functional teams across the entire product lifecycle—from hardware requirement scoping to software implementation. By leveraging the latest embedded technologies, you will deliver high-quality, high-performance software systems that bring reliable power, convenience, and security to households lacking electricity across Africa and Asia. What you will be expected to do Develop Low-Level Drivers: Code and debug peripheral drivers including, but not limited to, UART, ADC, SPI, I2C, DMA, PWM, RTC, IAP, and LCD. Develop Application Software: Design and optimize core applications, such as lithium-battery charge/discharge management, solar MPPT algorithms, MCU low-power management, HMI interfaces, and device status data logging. Product Maintenance & Debugging: Investigate, troubleshoot, and resolve issues in existing embedded products to continuously optimize product performance and design. Technical Documentation: Write and maintain comprehensive software design documents and technical specifications. You might be a strong candidate if you have/are Bachelor’s degree or above in Computer Science, Electronic Engineering, Communications, or a related field, with at least 6 years of experience in embedded software development. Minimum 3 years of hands-on experience with STM32 (mandatory), and proficiency with at least one other architecture (e.g., Nuvoton/similar Cortex 32-bit MCUs, 8051, Freescale, TI, or NEC). Exceptional C programming capabilities with solid coding foundations and excellent documentation habits. Proven experience in low-power Bluetooth (BLE), Wi-Fi, GSM, or IoT module integration. Familiar with hardware driver implementation; ability to read schematic diagrams, independently debug hardware drivers, and proficiently use instruments like oscilloscopes and multimeters. Fluent in version control and project management tools such as SVN, GitHub, and Bugzilla. Strong learning agility, excellent communication, and a strong sense of teamwork. Professional proficiency in both written and spoken English. 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.