Middle Embedded Software Developer (IoT)

Role summary

Middle Embedded Software Developer (IoT) is a role at Sigma Software in Warsaw, Masovian Voivodeship, Poland (on-site). Posted 2026-08-04. Experience level: 2-5.

Job title

Middle Embedded Software Developer (IoT)

Company

Sigma Software

Location

Warsaw, Masovian Voivodeship, Poland

Work arrangement

on-site

Category

Software Engineering

Experience level

2-5

Date posted

2026-08-04

Job description

Company Description

Sigma Software is looking for an Embedded Software Developer to join our growing Embedded Software Development team and contribute to the creation of innovative smart beverage solutions.

Are you passionate about embedded development? Let's work together!

CUSTOMER

Our Customer is an international company that develops innovative IoT-based smart home and lifestyle solutions, combining user experience, safety, and cutting-edge embedded technologies.

PROJECT

The project includes the development of the Curated House System – an innovative smart beverage solution that integrates a user interface, face recognition, beverage dispensing control, OTA updates, and future cloud integrations. The solution combines embedded systems, IoT, UI frameworks, and computer vision to ensure a seamless and intelligent user experience.

Technology stack: C, ST, UART, I2C, SPI, J-link, HALs, FatFS, lwIP, ASIC, FPGA, RTOS.

Job Description

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 documention

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

Qualifications

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

WOULD BE A PLUS:

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)