Remote IoT Embedded Firmware Engineer

Sigma Software; Województwo mazowieckie; Remote; PLN 120,000 - 180,000; Full time

Job summary

Sigma Software is seeking a Middle Embedded Software Developer for remote, full-time work. You will contribute to IoT-powered smart beverage solutions, crafting real-time firmware, touchscreen interfaces, and secure OTA updates across embedded platforms.

You will design drivers for displays, cameras, sensors, and actuators, implement beverage dispensing logic, and optimize GUIs. The role requires 4+ years in embedded C/C++, hands-on experience with STM32/ARM, and strong networking knowledge.

Qualifications

• At least 4years of commercial experience in embedded software development using C/C++
• Strong expertise with STM32 and ARM Cortex-M architectures
• Familiarity with embedded platforms from NXP, TI, or Silicon Labs
• Hands-on experience with UART, I2C, SPI, and Wi-Fi communication interfaces
• Solid understanding of networking protocols including MQTT, DNS, DHCP, mDNS, TCP/IP, and UDP
• Experience with FreeRTOS or Zephyr RTOS
• Experience implementing secure boot, OTA updates, checksums, and firmware validation mechanisms
• Experience with bootloader development and firmware update support
• Understanding of cybersecurity principles for IoT and embedded systems
• Strong debugging and troubleshooting skills on real hardware
• Upper-Intermediate or higher English level

Responsibilities

• Design and implement embedded software components and hardware drivers for displays, cameras, sensors, and actuators
• Develop beverage dispensing logic, including temperature control, pumps, valves, and safety mechanisms
• Implement and maintain secure OTA firmware update functionality over HTTPS
• Develop and optimize embedded graphical user interfaces for LCD touchscreens
• Write clean, maintainable, and efficient C/C++ code
• Debug firmware and perform root-cause analysis on embedded hardware platforms
• Create and maintain technical documentation
• Conduct unit and integration testing on real hardware devices
• Support QA engineers during validation and troubleshooting activities
• Participate in sprint planning, estimation, and Customer communication
• Collaborate with architects, security specialists, and compliance engineers
• Ensure adherence to engineering best practices and quality standards

Skills

C/C++

Embedded software development

STM32

ARM Cortex-M

UART

I2C

SPI

Wi‑Fi

Networking protocols (MQTT DNS DHCP mD

TCP/IP

UDP

FreeRTOS

Zephyr RTOS

Secure boot

OTA updates

Firmware validation

Bootloader development

Cybersecurity for IoT

Debugging on real hardware

English (Upper-Intermediate)

Tools

FatFS

LittleFS

lwIP

Job description

Sigma Software is seeking a Middle Embedded Software Developer for remote, full-time work. You will contribute to IoT-powered smart beverage solutions, crafting real-time firmware, touchscreen interfaces, and secure OTA updates across embedded platforms.

You will design drivers for displays, cameras, sensors, and actuators, implement beverage dispensing logic, and optimize GUIs. The role requires 4+ years in embedded C/C++, hands-on experience with STM32/ARM, and strong networking knowledge.