Firmware Engineer – Liquid Cooling

Overview

Delta, founded in 1971, is a global leader in switching power supplies and thermal management products with a thriving portfolio of innovative energy-saving systems and solutions in the fields of industrial automation, building automation, telecom power, data center infrastructure, EV charging, renewable energy, energy storage, and display, to nurture the development of innovative manufacturing and sustainable cities. As a world-class corporate citizen guided by its mission statement, “To provide innovative, clean and energy-efficient solutions for a better tomorrow,” Delta leverages its core competence in high-efficiency power electronics and its ESG-embedded business model to address key environmental issues, such as climate change.

Delta serves customers through its sales offices, R&D centers, and manufacturing facilities, which are spread across nearly 200 locations on five continents. Delta has 158 sales offices, 72 research and development (R&D) centers, and 48 manufacturing facilities worldwide.

Throughout its history, Delta has received various global awards and recognition for its business achievements, innovative technologies, and dedication to ESG. Since 2011, Delta has been listed on the Dow Jones Sustainability™ World Index for 11 consecutive years. In 2021, Delta was also recognized by CDP with leadership-level ratings for its substantial contributions to climate change and water security issues and was named Supplier Engagement Leader for its continuous development of a sustainable value chain.

• We are looking for a Firmware Engineer to develop and maintain embedded firmware for our Coolant Distribution Unit (CDU) platform. You will build reliable control and monitoring functions on STM
  32-based controllers, integrating Modbus (RTU/TCP) and low-level hardware interfaces for pumps, fans, sensors, and safety mechanisms. This role works closely with hardware, system integration, and test teams to deliver production-ready firmware with strong quality and traceability.
• Develop embedded firmware on STM
  32 (bare-metal/RTOS as applicable) for CDU control functions (pump/fan control, sensor acquisition, alarms, interlocks).
• Implement and maintain Modbus RTU/TCP communication, register maps, and diagnostics to support HMI/PLC/SCADA integration.
• Design and implement peripheral drivers and board support: I2C/SPI/UART/RS-485/ADC/PWM/GPIO/Watchdog.
• Define and verify control logic and fault handling (over-temp, low-flow, leak detect, dry-run prevention, sensor failover).
• Support manufacturing test and bring-up: production programming, calibration flows, self-test/BIST, and test fixtures.
• Debug issues across HW/FW boundary; perform root-cause analysis and drive corrective actions.
• Maintain engineering documentation (requirements, design notes, interface specs, test evidence) and support traceability.

• Bachelor’s degree in EE/CE/CS or equivalent practical experience.
• 3+ years experience in embedded firmware development.
• Strong programming skills in C (and familiarity with embedded debugging).
• Hands-on experience with STM
  32 (or similar MCU) and common peripherals.
• Experience with serial communication and fieldbus protocols (RS-485 preferred).
• Comfortable using Git, issue tracking, and basic CI/build systems.
• Preferred Qualifications:
• Experience with CDU / thermal / liquid cooling / industrial control
• Deep experience with Modbus RTU/TCP, register definition, timing/robustness, and interoperability testing.
• Experience with RTOS (e.g., Azure RTOS) and real-time constraints.
• Familiarity with safety/quality processes (e.g., coding guidelines, static analysis, unit tests, traceability).
• Experience with motor control or actuator control (pump/fan speed control, tach feedback, PID).

• Fluent in Mandarin

Benefit at Delta Electronics Americas

Life at Delta

Delta Electronics Americas is an Equal Opportunity Employer and is committed to compliance with all applicable federal, state, and local laws. Delta Electronics America is committed to fostering a diverse, inclusive, and respectful workplace. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, age, marital status, national origin, disability, veteran status, or any other protected characteristic.