Embedded C Developer

SWITS DIGITAL Private Limited; Bengaluru Urban; On-site; INR 1,100,000 - 1,800,000; Full time

Job summary

SWITS DIGITAL Private Limited in Bengaluru seeks a Senior Embedded C Developer with 5-8 years of hands-on Embedded C, RTOS, and IoT firmware development. The candidate will design, develop, debug, and maintain embedded firmware for connected devices.

The role emphasizes working with MCUs, RTOS-based apps, and cloud-connected systems, plus strong debugging and IoT protocol experience, including MQTT and AT interfaces on modem platforms.

Qualifications

• 5-8 years of embedded C development experience.
• Experience with RTOS (ThreadX preferred; FreeRTOS/Zephyr/embOS).
• Experience with IoT protocols and cloud-connected embedded systems.

Responsibilities

• 5-8+ years of embedded C development with ownership of production firmware subsystems.
• Deep RTOS experience (ThreadX strongly preferred; otherwise FreeRTOS/Zephyr/embOS).
• Strong MCU/embedded fundamentals, interrupts, memory maps, and peripheral programming.
• Ability to reverse-engineer unfamiliar code and hardware behavior from code and docs.
• IoT protocols: MQTT and device management protocols (LwM2M/TR-069).
• Experience with cellular modem platforms (Quectel/Telit) and AT commands.
• Debugging low-level issues: memory corruption, race conditions, watchdog analysis.
• FOTA/firmware update design and secure boot/update integrity.
• Strong code review and mentoring skills.

Skills

Embedded C

RTOS

IoT firmware

MQTT

Networking TCP/IP

Git

Debugging

ARM Cortex-M

Code review

Tools

Git

Job description

Job Title: Senior Embedded C Developer RTOS & IoT

Experience: 5-8 Years

Employment Type: Full-Time

Work Location: Bangalore

Job Overview

We are looking for a skilled Embedded C Developer with strong hands-on experience in Embedded C, RTOS, and IoT-based firmware development. The candidate will be responsible for designing, developing, integrating, debugging, and maintaining embedded firmware for connected devices.

The ideal candidate should have experience working with microcontrollers, RTOS-based applications, IoT communication protocols, device connectivity, firmware debugging, and cloud-connected embedded systems.

Key Responsibilities

• 5 8+ years of embedded C development, with demonstrated ownership of production firmware subsystems
• Deep RTOS experience (ThreadX strongly preferred; otherwise FreeRTOS/Zephyr/embOS with willingness to ramp up)
• Strong MCU/embedded fundamentals independent of any single vendor SDK: interrupts, memory maps, linker scripts, peripheral register-level programming, sensor interfacing (I2C/SPI), and the ability to bring up understanding of a new chip/platform from its reference manual and existing code
• Demonstrated ability to inherit and support firmware you did not write reverse-engineering intent from code, git history, and observed hardware/sensor behavior when documentation is incomplete
• Experience with IoT protocols: MQTT (pub/sub, QoS, keepalive tuning) and device management protocols (LwM2M, TR-069, or similar)
• Experience with cellular modem platforms (Quectel, Telit, or similar) and AT command interfaces
• Track record debugging low-level issues: memory corruption, race conditions, watchdog/reset analysis, sensor/MCU communication faults
• Experience with FOTA/firmware update design and secure boot/update integrity
• Strong code review and mentoring skills

Required Skills

• Strong programming experience in Embedded C.
• Hands-on experience with RTOS, preferably FreeRTOS, ThreadX, or Zephyr.
• Good understanding of RTOS concepts, including tasks/threads, scheduling, synchronization, semaphores, mutexes, queues, and timers.
• Strong understanding of embedded systems and microcontrollers.
• Hands-on experience in IoT firmware development.
• Good knowledge of MQTT and/or LwM2M.
• Experience with TCP/IP, HTTP/HTTPS, UDP, or other networking concepts.
• Experience with UART, SPI, I2C, GPIO, CAN, ADC, PWM, and other embedded interfaces.
• Experience with ARM Cortex-M or similar microcontroller architectures.
• Good debugging and troubleshooting skills.
• Experience with Git or other version-control systems.
• Understanding of firmware lifecycle, software testing, and defect management.