Middle Embedded Software Developer (IoT)

Stack

Responsibilities

• ▹Design and implement components and drivers (display, camera, sensors, actuators)
• ▹Develop beverage dispensing logic (temperature, pumps, valves, safety)
• ▹Implement and manage secure firmware updates (OTA) over HTTPS
• ▹Develop and optimize embedded user interfaces with LCD touchscreens and graphics libraries
• ▹Code in C/C++, debug, and create documentation
• ▹Perform unit and integration testing on real hardware
• ▹Support QA engineers during validation and troubleshooting
• ▹Participate in planning, estimation, and customer meetings
• ▹Collaborate with architects, security, and compliance engineers
• ▹Ensure adherence to best engineering practices and quality standards

Requirements

• ▹4+ years of experience in embedded software development using C/C++
• ▹Strong knowledge of STM32 (H7/MP1), ARM Cortex-M and familiarity with NXP, TI, SiLabs platforms
• ▹Experience with communication interfaces: UART, I2C, SPI, and Wi-Fi
• ▹Proficiency with networking protocols: MQTT, DNS, DHCP, mDNS, TCP/IP and UDP
• ▹Experience with FreeRTOS or Zephyr
• ▹Experience with embedded graphics framework (TouchGFX)
• ▹Experience with LCD touchscreen integration (capacitive/resistive controllers, drivers)
• ▹Experience with security features (secure boot, checksums, OTA updates)
• ▹Experience with bootloader development and OTA support
• ▹Understanding of cybersecurity in IoT solutions
• ▹Upper-Intermediate level of English

Nice to have

• ▹Experience with camera integration (image capture, processing, streaming)
• ▹Experience with face recognition and/or embedded vision SDKs
• ▹Experience with file systems (FatFS, LittleFS) and networking stacks (lwIP or similar)
• ▹Background in fluidics control (pumps, flow sensors, pressure sensors)

About the company

Sigma Software's embedded team works for an international customer developing IoT-based smart home and lifestyle solutions. The project is the Curated House System, an innovative smart beverage solution integrating a user interface, face recognition, beverage dispensing control, OTA updates, and future cloud integrations.