Senior Embedded Software Developer (Networking, Security)

Join our Embedded Development team at Sigma Software and contribute to the development of next-generation connected IoT devices and edge solutions!

We are looking for a Senior Embedded Software Developer with strong networking and cybersecurity expertise to design and implement secure, reliable embedded systems with cloud connectivity and remote device management capabilities.

CUSTOMER

Our Customer is a global technology company specializing in climate technologies and energy management solutions. The company develops connected products and intelligent control systems for commercial, industrial, and residential environments, helping improve energy efficiency, operational reliability, and sustainability through modern smart infrastructure technologies.

PROJECT

The project focuses on developing secure, connected embedded systems that integrate with cloud platforms, support remote device management, and ensure reliable communication in real-world environments. The solution combines embedded software engineering, networking technologies, and cybersecurity principles to deliver scalable and reliable IoT solutions for modern edge devices.

REQUIREMENTS

5+ years of commercial experience in embedded software development using C/C++

Strong experience with ARM-based microcontrollers such as STM32, NXP, TI, or Silicon Labs

Strong understanding of embedded systems architecture, RTOS concepts, and hardware-software interaction

Practical experience with wireless technologies including BLE, Wi‑Fi, LTE, Zigbee, or Thread

Solid networking knowledge including TCP/IP, UDP, DHCP, DNS, IPv4/IPv6, MQTT, HTTP/HTTPS, and WebSockets

Experience with cloud-connected embedded devices and IoT ecosystems

Experience implementing OTA/FOTA firmware update mechanisms

Understanding of embedded cybersecurity concepts including secure boot, TLS/SSL, certificate management, authentication, and cryptographic fundamentals

Experience with communication interfaces such as UART, SPI, I2C, CAN, and Ethernet

Experience with FreeRTOS, Zephyr, Embedded Linux, or similar platforms

Strong debugging and troubleshooting skills using J-Link, ST-Link, GDB, or equivalent tools

Experience with Git-based development workflows

Upper-Intermediate or higher English level

RESPONSIBILITIES

Design and implement embedded software components and device functionality for connected IoT systems

Develop, optimize, and maintain networking capabilities for cloud-connected embedded devices

Implement telemetry, monitoring, remote provisioning, and Firmware-Over-the-Air update mechanisms

Integrate and troubleshoot communication technologies including Ethernet, Wi‑Fi, BLE, LTE, Zigbee, and Thread

Develop secure communication mechanisms following embedded cybersecurity best practices

Design and maintain bootloaders, firmware update systems, and device lifecycle management functionality

Perform debugging, troubleshooting, and root-cause analysis on real hardware platforms

Conduct unit, integration, and system-level testing

Collaborate with architects, hardware engineers, QA specialists, and security experts

Participate in technical discussions, estimations, planning sessions, and Customer communication

Prepare and maintain technical documentation

Ensure compliance with engineering standards, security requirements, and quality processes

Contribute to continuous improvement of development practices and engineering workflows

WILL BE A PLUS

Experience with cybersecurity standards and secure development practices for IoT products

Practical experience with networking stacks such as lwIP

Experience with secure bootloader development and device provisioning

Knowledge of PKI, certificate-based authentication, and hardware security modules

Familiarity with Docker, GitLab CI/CD, and automated testing frameworks

Experience with AWS IoT, Azure IoT, or Google Cloud IoT

Basic hardware design and debugging knowledge

Experience with secure manufacturing and device onboarding processes