{"id":115209,"url":"https://alion.io/job/unifi-si-simulation-engineer","title":"SI Simulation 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":158,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":128,"computed_at":"2026-10-13T05:45:00Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","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":19000,"max_usd":43000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":6708},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Ansys SIwave","optional":false},{"name":"BERT","optional":false}],"status":"live","first_seen_at":"2026-05-19T07:46:22Z","employer_posted_date":"2026-08-14","last_verified_at":"2026-10-14T02:18:12Z","board_verified":true,"closed_at":null,"days_open":147,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":147},"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\nPerform pre-layout and post-layout signal integrity simulation for high-speed interfaces, including DDR4/DDR5, PCIe Gen3-Gen5, and 100G/400G/800G Ethernet.\nEvaluate channel loss, PCB material, stack-up, IC placement, and routing constraints during the early design stage.\nBuild and analyze end-to-end channel models, including PCB traces, vias, connectors, cables, packages, and IC models.\nOptimize high-speed channel structures, including vias, anti-pads, connector launches, cables, and routing topology.\nAnalyze insertion loss, return loss, crosstalk, impedance discontinuity, jitter, eye diagram, and BER performance.\nDefine PCB layout guidelines and routing constraints for high-speed interfaces.\nWork with EE, layout, mechanical, vendor, and validation teams to review designs and resolve SI issues.\nSupport simulation-to-measurement correlation using VNA, TDR, oscilloscope, BERT, or compliance test results.\nQualifications\nBachelor’s degree or above in Electrical Engineering, Electronics Engineering, or a related field.\n5+ years of experience in high-speed signal integrity simulation and PCB channel design.\nHands-on experience with Ansys simulation tools, such as HFSS, SIwave, Q3D, or AEDT.\nFamiliar with high-speed interfaces, including:\nDDR4,DDR5\nPCIe up to Gen5\nIEEE 802.3by / 802.3bm / 802.3bs / 802.3cd,100G / 400G / 800G Ethernet\nStrong understanding of high-speed channel behavior, including insertion loss, return loss, crosstalk, impedance discontinuity, jitter, eye diagram, and BER.\nAbility to define practical PCB routing constraints and provide design recommendations.\nPreferred Qualifications\nExperience with 25G / 56G / 112G SerDes channel design.\nExperience with switch, router, server, NIC, AI server, or high-speed backplane products.\nKnowledge of low-loss PCB materials, Dk/Df, copper roughness, and glass weave effects.\nFamiliar with IBIS-AMI models, S-parameters, equalization tuning, and channel operating margin analysis.\nExperience creating SI simulation reports, layout guidelines, and design checklists.\nExperience supporting lab validation and debugging SI-related issues.","description_format":"text","description_chars":2773,"description_truncated":false,"requirements":{"experience_years_min":5,"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 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