Embedded Firmware Engineer - UniFi Connect

About Ubiquiti At Ubiquiti Inc., we create technology platforms for Businesses, Smart Homes, and Internet Service Providers, driven by our goal to connect everyone, everywhere. To date, Ubiquiti has shipped over 100 million devices worldwide, from ISP networking products to next generation of IT solutions. Our growth is made possible by the dedicated team of hundreds behind the scenes. From software developers and product managers to designers and strategists, Team UI is driven to achieve our common goal: Rethinking IT. At Ubiquiti, you’ll heighten your potential and broaden your horizons - all while shaping the future of connectivity.

Join forces with us on our mission to build a better IT industry. We are currently looking for a highly skilled Embedded Software Engineer to our team in Stockholm or Malmö, Sweden. Please note that applicants must live in Sweden and hold a valid work permit at the time of application to be considered for this role. Responsibilities

• Design, implement, and debug embedded firmware for 802.15.4 Thread-based devices (border routers, RCPs, sleepy/end devices) running on an RTOS and embedded Linux
• Integrate and maintain the OpenThread stack and Matter commissioning/data-model layers across the product line
• Work closely with hardware engineers on SoC/MCU bring-up and debug radio timing, RF, and low-power issues at the driver level
• Implement and troubleshoot Thread border routing, SRP, and network commissioning/joining flows, including bridging to Wi-Fi/Ethernet backbones
• Diagnose firmware-level issues using JTAG/SWD debuggers, logic analyzers, and protocol sniffers/packet captures
• Write and maintain unit and integration tests; participate in code review
• Contribute to OTA update pipelines and manufacturing/production test tooling

Requirements

• Strong proficiency in C++ (99 % code base) and C for embedded systems
• Hands-on experience with an RTOS (FreeRTOS, Zephyr, or similar)
• Solid MCU debugging skills
• Solid networking fundamentals, including IPv6, TCP/UDP
• Strong analytical and debugging skills; able to work independently and cross-functionally

Nice To Have

• Embedded Linux experience
• Linux kernel development experience
• Practical experience with 802.15.4 Thread, or comparable low-power mesh wireless protocols (Zigbee, Bluetooth Mesh)
• Experience with OpenWRT, Yocto, or Buildroot build systems
• Matter/CHIP protocol experience
• Direct experience with the OpenThread stack
• Experience with vendor embedded SDKs (ESP-IDF, nRF Connect SDK, or similar)

Benefits

• International work environment
• Competitive compensation package including wellness allowance, occupational pension, medical insurance, private health insurance, life insurance and work-injury insurance
• Five weeks of holiday per year
• Flexible work hours and hybrid work model
• Modern office space located in Epicenter (Hötorget)
• Access to all the latest Ubiquiti products and prototypes for home use and tests)

Please note that a background check will be conducted in the final stage of the recruitment process