MCU Firmware Engineer
Ubiquiti
MCU Firmware Engineer
Ubiquiti
Delivers enterprise and consumer networking gear
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.
Responsibilities
Design, develop, and debug real-time embedded firmware for IoT systems, including gateways, lighting control, and environmental monitoring and control solutions.
Maintain, optimize, and improve firmware for existing RTOS-based devices.
Collaborate cross-functionally with BSP, HW, ID, Backend, Mobile, FE, PM, and PA teams to deliver high-quality products.
Contribute to system-level architecture decisions for multi-module communication
Document software architecture, tuning methods, and test results.
Perform code reviews, ensuring best practices in coding standards.
Participate in troubleshooting and root-cause analysis for firmware issues.
Collaborate with QA and manufacturing teams for production firmware validation, factory firmware, and calibration procedures.
Strong knowledge of networking fundamentals and protocols like TCP/IP (IPv4 and IPv6), socket programming, and higher-level protocols such as HTTP, WebSockets, or MQTT used in IoT systems.
Experience developing firmware in a Real-Time Operating System (RTOS) environment (such as FreeRTOS or Zephyr).
Proficient in C/C++ programming in embedded environments with RTOS.
Understanding of memory management, interrupt handling, and power management in constrained systems.
Familiarity with Git version control.
A team player, who is self-motivated, loves difficult challenges, and is goal-driven.
Experience with Ethernet, Wi-Fi, BLE, or Thread communication protocols.
Experience with UART, SPI, I2C, GPIO control, ADC/DAC, PWM, RS485 and other peripheral interfaces.
Skilled at defining and implementing custom communication protocols for heterogeneous systems.
Experience with CoAP in constrained embedded environments.
Experience in low-power firmware design and sensor integration.
Experience with OTA update systems, bootloaders, and secure provisioning.
Understanding of manufacturing test firmware, hardware calibration, and diagnostic mode implementations.
Experience working with ESP-IDF, Silicon Labs Gecko SDK, or Linux-based MCU co-processors.
Ubiquiti designs and sells networking equipment for enterprises, service providers, and consumers. Its products include the UniFi line (access points, switches, routers, cameras) managed by UniFi OS for centralized control; airMAX, airFiber, and UFiber for WISPs to build long-distance wireless links; and AmpliFi for home mesh networks. The company uses a direct-to-consumer, lean distribution model with a global network of distributors and a strong online user community that helps steer product development. Its goal is to provide affordable, high-performance networking hardware that expands internet access in underserved and emerging markets while supporting a broad ecosystem of users and partners.
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