{"id":55558,"url":"https://alion.io/job/ubiquiti-mcu-firmware-engineer","title":"MCU Firmware Engineer","company":{"id":16273,"name":"Ubiquiti","domain":"ui.com","url":"https://alion.io/company/ubiquiti","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"A","score":95,"open_postings":155,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":137,"computed_at":"2026-10-28T05:59:10Z"}},"role":"Hardware","role_family":"Hardware","seniority":null,"employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Taipei, Taiwan"],"countries":["TW"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":14500,"max_usd":35000,"period":"year","method":"role_country_seniority_unknown","sample_n":23},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"FreeRTOS","optional":false},{"name":"Git","optional":false},{"name":"MQTT","optional":false},{"name":"RTOS","optional":false},{"name":"TCP/IP","optional":false},{"name":"WebSockets","optional":false},{"name":"CoAP","optional":true},{"name":"ESP-IDF","optional":true},{"name":"Linux","optional":true},{"name":"Wi-Fi","optional":true}],"status":"live","first_seen_at":"2026-03-09T08:05:14Z","employer_posted_date":"2026-08-14","last_verified_at":"2026-10-28T06:03:02Z","board_verified":true,"closed_at":null,"days_open":232,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":232},"description":"About Ubiquiti\nAt 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.\nResponsibilities\nDesign, develop, and debug real-time embedded firmware for IoT systems, including gateways, lighting control, and environmental monitoring and control solutions.\n\nMaintain, optimize, and improve firmware for existing RTOS-based devices.\n\nCollaborate cross-functionally with BSP, HW, ID, Backend, Mobile, FE, PM, and PA teams to deliver high-quality products.\n\nContribute to system-level architecture decisions for multi-module communication\n\nDocument software architecture, tuning methods, and test results.\n\nPerform code reviews, ensuring best practices in coding standards.\n\nParticipate in troubleshooting and root-cause analysis for firmware issues.\n\nCollaborate with QA and manufacturing teams for production firmware validation, factory firmware, and calibration procedures.\n\nRequirement (Must-Haves)\nStrong 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.\n\nExperience developing firmware in a Real-Time Operating System (RTOS) environment (such as FreeRTOS or Zephyr).\n\nProficient in C/C++ programming in embedded environments with RTOS.\n\nUnderstanding of memory management, interrupt handling, and power management in constrained systems.\n\nFamiliarity with Git version control.\n\nA team player, who is self-motivated, loves difficult challenges, and is goal-driven.\n\nPreferred Qualifications\nExperience with Ethernet, Wi-Fi, BLE, or Thread communication protocols.\n\nExperience with UART, SPI, I2C, GPIO control, ADC/DAC, PWM, RS485 and other peripheral interfaces.\n\nSkilled at defining and implementing custom communication protocols for heterogeneous systems.\n\nExperience with CoAP in constrained embedded environments.\n\nExperience in low-power firmware design and sensor integration.\n\nExperience with OTA update systems, bootloaders, and secure provisioning.\n\nUnderstanding of manufacturing test firmware, hardware calibration, and diagnostic mode implementations.\n\nExperience working with ESP-IDF, Silicon Labs Gecko SDK, or Linux-based MCU co-processors.","description_format":"text","description_chars":2758,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["RF & Wireless Hardware","Network Equipment","Video Surveillance"],"lifecycle":[{"event":"open","at":"2026-03-09T08:05:14Z"}],"visa":[],"liveness":{"score":20,"band":"cold","label":"Long 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