Senior Embedded Software Engineer – HVAC

4 days ago


Pathum Thani, Thailand Randstad Pte Ltd. Carrier Full time

Location: Bangkadi Industrial Park, Pathum Thani

Role Summary

We are seeking a Senior Embedded Software Engineer to design, develop, and maintain firmware for our next-generation HVAC and IoT-connected products.

You will collaborate with hardware, system, cloud, mobile app, and testing teams to deliver reliable, secure, and maintainable embedded software that meets global quality and regulatory standards.


Key Responsibilities
  • Design, implement, and maintain embedded firmware in C/C++ for microcontroller-based systems (e.g., RL78, ARM Cortex-M).
  • Develop and integrate features for HVAC control, IoT connectivity, and communication interfaces.
  • Work with RTOS environments (e.g., FreeRTOS): task design, scheduling, inter-task communication, and resource management.
  • Implement and debug communication protocols: UART, SPI, I²C, CAN, Modbus, or proprietary protocols.
  • Collaborate with cloud and mobile app teams to define and implement data models and communication interfaces (MQTT, HTTP/REST, BLE/Wi-Fi provisioning).
  • Ensure high code quality through reviews, static analysis, unit and integration tests.
  • Analyze and resolve complex firmware issues using debuggers, logic analyzers, and protocol analyzers.
  • Contribute to software architecture and design documentation, interface specifications, and design reviews.
  • Support system integration, field trials, and issue investigation with testing, production, and service teams.
  • Follow secure coding practices and support cybersecurity and compliance requirements.
  • Mentor junior engineers, provide technical guidance, and share best practices.
  • Participate in project planning, effort estimation, and risk identification.

Qualifications & Experience
  • Bachelor's or Master's in Electrical Engineering, Computer Engineering, Computer Science, or related field.
  • 5+ years of experience in embedded software/firmware development.
  • Strong proficiency in C for embedded systems; C++ is a plus.
  • Hands-on experience with 8/16/32-bit microcontrollers (Renesas, STM32, NXP, etc.) and toolchains (IAR, GCC, etc.).
  • Experience with RTOS and real-time embedded constraints.
  • Solid understanding of memory management, interrupts, timers, low-power modes, bootloaders, etc.
  • Proven experience debugging embedded systems using JTAG/SWD debuggers and measurement tools.
  • Familiarity with structured software development processes: version control, coding standards, code review, CI/CD.
  • Good written and spoken English for global collaboration and documentation.


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