Embedded Software Developer (IoT)

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

Are you passionate about embedded development and smart connected devices? We are looking for a Middle Embedded Software Developer to join Sigma Software and contribute to the development of innovative IoT-powered smart beverage solutions.
In this remote full-time position, you will work on modern embedded systems that combine real-time firmware, touchscreen interfaces, networking, computer vision, and secure OTA functionality.
We at Sigma Software create opportunities to work with advanced technologies, distributed engineering teams, and meaningful products used in real-life environments. This role offers the chance to work on cutting-edge IoT solutions while growing your expertise in embedded systems and smart device engineering.

CUSTOMER

Our Customer is an international company specializing in IoT-based smart home and lifestyle solutions. The company develops connected products that combine embedded technologies, intelligent automation, safety, and seamless user experience to create modern smart ecosystems for consumers worldwide.

PROJECT

The project focuses on the development of the “Curated House System” — an innovative smart beverage solution that combines embedded systems, intelligent user interaction, and future cloud connectivity. The platform includes touchscreen interfaces, beverage dispensing control, face recognition capabilities, secure OTA firmware updates, and integration with multiple hardware peripherals and sensors.

As part of the project, you will work with both low-level firmware and system-level features to deliver a seamless and intelligent user experience for next-generation smart devices.

• 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

• 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

WILL BE A PLUS

• Experience with camera integration, image capture, processing, or streaming
• Experience with face recognition technologies or embedded vision SDKs
• Experience with embedded file systems such as FatFS or LittleFS
• Experience with networking stacks such as lwIP
• Background in fluidics control systems, including pumps, flow sensors, or pressure sensors
• Experience working with FPGA or ASIC-based systems

PERSONAL PROFILE

• Strong problem-solving and analytical thinking skills
• Ability to work independently and proactively in distributed teams
• Good communication and collaboration skills
• Attention to detail and commitment to engineering quality
• Ability to balance low-level hardware interaction with system-level thinking