Embedded Software Developer (IoT)

Sigma Software

18h•Remote

About The Position

Join Sigma Software as a Middle Embedded Software Developer working remotely on IoT-powered smart beverage solutions. The role involves developing modern embedded systems combining real-time firmware, touchscreen interfaces, networking, computer vision, and secure over-the-air (OTA) functionality. The customer is an international company specializing in IoT-based smart home and lifestyle products. The project is the “Curated House System,” a smart beverage solution featuring touchscreen interaction, beverage dispensing control, face recognition capabilities, secure OTA firmware updates, and integrations with hardware peripherals and sensors. The developer will work on low-level firmware and system-level features to support a seamless user experience for next-generation smart devices. The role also involves collaboration with distributed engineering teams and customer stakeholders.

Requirements

At least 4 years 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 MQTT, DNS, DHCP, mDNS, TCP/IP, and UDP networking protocols.
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.
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.

Nice To Haves

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.

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 updates 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.