{"id":55520,"url":"https://alion.io/job/ubiquiti-digital-power-system-engineer-power-tech","title":"Digital Power System Engineer (Power Tech)","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":154,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":137,"computed_at":"2026-10-22T06:10:10Z"}},"role":"DevOps","role_family":"DevOps","seniority":"senior","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":18500,"max_usd":51000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":3299},"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"Git","optional":true},{"name":"MATLAB","optional":true},{"name":"Simulink","optional":true}],"status":"live","first_seen_at":"2026-05-29T09:31:57Z","employer_posted_date":"2026-08-14","last_verified_at":"2026-10-22T19:27:00Z","board_verified":true,"closed_at":null,"days_open":146,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":145},"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 and implement digital control loops (voltage, current, PLL, droop, etc.) for the rectifier, inverter, and DC/DC stages of Online UPS systems.\nDevelop and tune control algorithms such as PI/PID, state feedback, repetitive control, and feedforward compensation for power conversion topologies.\nImplement high-frequency PWM/SVPWM generation, ADC sampling, and interrupt-driven real-time control on DSP/MCU platforms.\nDevelop firmware for full UPS operating modes - online (double-conversion), eco, battery, and bypass - including seamless mode transitions.\nImplement battery charger control (CC/CV charging, charge/discharge management) and coordinate with the BMS for safe battery operation.\nOptimize control performance for transient response, output THD, efficiency, and stability across line and load conditions.\nDesign firmware-level protection and fault-handling logic (OV/UV/OC/OTP, short-circuit, inrush, output overload).\nPerform bring-up, debugging, and waveform analysis using oscilloscopes, current probes, and emulators.\nCollaborate with power hardware, magnetics, and system engineers to co-tune control loops with the physical plant.\nSupport compliance testing (efficiency, THD, hold-up time, EMI) and resolve firmware-related issues.\nMinimum Qualifications\nBachelor's or Master's degree in Electrical Engineering, Power Electronics, Control Engineering, or a related field.\n7+ years of firmware development experience focused on digital power conversion.\nProven track record of shipping Online UPS firmware - hands-on experience with rectifier, inverter, and bypass control is essential.\nStrong hands-on experience implementing digital control loops for switching power converters (PFC, inverter, bidirectional DC/DC, LLC, phase-shift full-bridge, etc.).\nDeep understanding of Power Factor Correction techniques - average current mode control, bridgeless / totem-pole PFC, interleaved PFC.\nWorking knowledge of battery charge/discharge control, including CC/CV charging profiles, charger-to-BMS coordination, and battery protection.\nProficiency with real-time control DSPs/MCUs (e.g., TI C2000, STM32 G4/H7, Infineon XMC, or equivalent); strong understanding of ePWM, ADC, and trip-zone style peripherals.\nStrong grasp of control theory: s-domain / z-domain analysis, Bode plot tuning, discretization (Tustin, ZOH), and loop compensation.\nProficient in C/C++ and real-time, interrupt-driven embedded programming.\nExperience working with power stage waveforms and debugging closed-loop control issues on real hardware.\nPreferred Qualifications\nExperience with 3-phase UPS, parallel/redundant UPS operation, or modular UPS architectures.\nFamiliarity with MATLAB/Simulink, PLECS, or PSIM for control modeling and offline simulation; experience with model-based design or auto-code generation is a plus.\nKnowledge of advanced techniques such as digital PLL for grid synchronization, resonant control, or model predictive control (MPC).\nExperience addressing EMI/EMC issues through firmware (e.g., switching pattern shaping, spread spectrum).\nFamiliarity with UPS-relevant safety and regulatory standards (IEC 62040, UL 1778, IEC 61000, etc.).\nExperience with version control (Git) and firmware architecture design for safety-critical, real-time systems.\nAbility to read power electronics schematics and collaborate closely with hardware engineers on loop tuning and stability.","description_format":"text","description_chars":4053,"description_truncated":false,"requirements":{"experience_years_min":7,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["RF & Wireless Hardware","Network Equipment","Video Surveillance"],"lifecycle":[{"event":"open","at":"2026-05-29T09:31:57Z"}],"visa":[],"liveness":{"score":35,"band":"fade","label":"Fading","p_open":1,"p_active":0.785,"p_room":0.44,"age_days":145,"expected_fill_days":137,"reasons":["conf:1","velocity","win:tail","crowd:brand"],"computed_at":"2026-10-22T06:10:10Z"},"pay":null,"html_url":"https://alion.io/job/ubiquiti-digital-power-system-engineer-power-tech","json_url":"https://alion.io/job/ubiquiti-digital-power-system-engineer-power-tech.json","meta":{"generated_at":"2026-10-22T23:18:31Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":8999,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-23T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":16273},"rest":"https://alion.io/mcp/rest/get_company?id=16273"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fubiquiti-digital-power-system-engineer-power-tech"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fubiquiti-digital-power-system-engineer-power-tech"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fubiquiti-digital-power-system-engineer-power-tech"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/ubiquiti-digital-power-system-engineer-power-tech\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fubiquiti-digital-power-system-engineer-power-tech"}]}