Embedded Firmware Engineer

Holmium Technologies Jaipur; Dadri; On-site; INR 900,000 - 1,500,000; Full time

Job summary

Holmium Technologies Pvt Ltd in Noida, Uttar Pradesh is seeking an Embedded Firmware Engineer to join our R&D team. You will design, develop, and debug firmware for ARM-based MCUs, with a focus on efficiency and reliability for industrial IoT devices.

The role requires strong hands-on Embedded C/C++, experience with STM32/ESP32, RTOS, and familiarity with Modbus, MQTT, and hardware debugging. You will collaborate with hardware, software, and cloud teams to deliver robust firmware and meet

Qualifications

• Strong hands-on experience with Embedded C.
• Experience with STM32, ESP32, AVR, or similar microcontrollers.
• Good understanding of RTOS, timers, interrupts, and low-level driver development.
• Familiar with Modbus, MQTT, RS485, CAN, and other industrial protocols.
• Working knowledge of hardware debugging tools like logic analyzers, oscilloscopes, and JTAG debuggers.
• Ability to read schematics and understand PCB design implications.
• Familiarity with Git or other version control systems.

Responsibilities

• Design, develop, and debug embedded firmware for microcontrollers (ARM, STM32, ESP32, etc.).
• Write efficient, reliable, and maintainable code in Embedded C/C++.
• Integrate communication protocols such as Modbus (RTU/TCP), RS485, UART, SPI, I2C, MQTT, TCP/IP.
• Implement features like data logging, sensor interfaces, and remote device control.
• Collaborate with hardware, software, and cloud teams for seamless product integration.
• Conduct unit and system-level testing to validate firmware performance.
• Optimize firmware for low power consumption and efficient memory usage.
• Document code, APIs, and firmware version release notes.
• Troubleshoot hardware-firmware issues during development and field testing.

Skills

Embedded C

STM32

ESP32

AVR

RTOS

Modbus

MQTT

RS485

CAN

Git

Hardware debugging

Education

B.Tech/B.E. in Electronics, Electrical, Instrumentation, Embedded Systems, or related field

Tools

None

Job description

Job description
Job Title: Embedded Firmware Engineer
Location: E-21 Sector-6, Noida, Uttar Pradesh
Company: Holmium Technologies Pvt Ltd
Experience: 2-6 years
Type: Full-time, On-site
About Holmium Technologies:
Holmium Technologies is a fast‑growing tech company specializing in embedded systems, remote monitoring, SCADA solutions, PV‑DG synchronization, zero export systems, and customized IoT‑based automation. We combine hardware design, firmware development, and cloud integration to deliver robust industrial and renewable energy solutions.
Job Summary:
We are looking for a passionate and experienced Embedded Firmware Engineer to join our R&D team. The ideal candidate should be skilled in embedded C programming, microcontroller‑based development, and communication protocols. You will play a key role in building the core firmware of our industrial‑grade IoT devices and automation controllers.
Key Responsibilities:

• Design, develop, and debug embedded firmware for microcontrollers (ARM, STM32, ESP32, etc.).
• Write efficient, reliable, and maintainable code in Embedded C/C++.
• Integrate communication protocols such as Modbus (RTU/TCP), RS485, UART, SPI, I2C, MQTT, TCP/IP.
• Implement features like data logging, sensor interfaces, and remote device control.
• Collaborate with hardware, software, and cloud teams for seamless product integration.
• Conduct unit and system‑level testing to validate firmware performance.
• Optimize firmware for low power consumption and efficient memory usage.
• Document code, APIs, and firmware version release notes.
• Troubleshoot hardware‑firmware issues during development and field testing.

Required Skills:

• Strong hands‑on experience with Embedded C.
• Experience with STM32, ESP32, AVR, or similar microcontrollers.
• Good understanding of RTOS, timers, interrupts, and low‑level driver development.
• Familiar with Modbus, MQTT, RS485, CAN, and other industrial protocols.
• Working knowledge of hardware debugging tools like logic analyzers, oscilloscopes, and JTAG debuggers.
• Ability to read schematics and understand PCB design implications.
• Familiarity with Git or other version control systems.

Preferred Qualifications:

• Experience in IoT‑based product development.
• Familiarity with FreeRTOS or other RTOS environments.
• Exposure to Python or Bash scripting for testing/debugging.
• Knowledge of firmware OTA updates and secure bootloaders.

Educational Qualification:

• B.Tech/B.E. in Electronics, Electrical, Instrumentation, Embedded Systems, or related field.