Ubiquiti
Technology
SISimulationEngineer
Neural analysis suggests this role is
optimal for Senior candidates.
“SI Simulation Engineer at Ubiquiti. Perform pre-layout simulation. Perform post-layout simulation”
Industry & Context.
What They're Looking For.
Must Have
Bachelor's degree or above, 5+ years experience, High-speed signal integrity simulation, PCB channel design, Ansys simulation tools, Familiar with high-speed interfaces, DDR4, DDR5, PCIe up to Gen5, 100G / 400G / 800G Ethernet, Understanding of high-speed channel behavior, Insertion loss, Return loss, Crosstalk, Impedance discontinuity, Jitter, Eye diagram, BER, Define practical PCB routing constraints, Provide design recommendations
Nice to Have
Experience with 25G SerDes, Experience with 56G SerDes, Experience with 112G SerDes, 25G / 56G / 112G SerDes channel design, Experience with switch products, Experience with router products, Experience with server products, Experience with NIC products, Experience with AI server products, Experience with high-speed backplane products, Knowledge of low-loss PCB materials, Knowledge of Dk/Df, Knowledge of copper roughness, Knowledge of glass weave effects, Familiar with IBIS-AMI models, Familiar with S-parameters, Familiar with equalization tuning, Familiar with channel operating margin analysis, Experience creating SI simulation reports, Experience creating layout guidelines, Experience creating design checklists, Experience supporting lab validation, Experience debugging SI-related issues
What You'll Do.
Perform pre-layout simulation
Perform post-layout simulation
Evaluate channel loss
Evaluate PCB material
Evaluate IC placement
Evaluate routing constraints
Analyze channel models
Optimize channel structures
Analyze insertion loss
Analyze impedance discontinuity
Analyze BER performance
Define PCB layout guidelines
Define routing constraints
Work with layout teams
Work with mechanical teams
Work with vendor teams
Work with validation teams
Support simulation-to-measurement correlation
Full Job Description
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 Perform pre-layout and post-layout signal integrity simulation for high-speed interfaces, including DDR4/DDR5, PCIe Gen3–Gen5, and 100G/400G/800G Ethernet. Evaluate channel loss, PCB material, stack-up, IC placement, and routing constraints during the early design stage. Build and analyze end-to-end channel models, including PCB traces, vias, connectors, cables, packages, and IC models. Optimize high-speed channel structures, including vias, anti-pads, connector launches, cables, and routing topology. Analyze insertion loss, return loss, crosstalk, impedance discontinuity, jitter, eye diagram, and BER performance. Define PCB layout guidelines and routing constraints for high-speed interfaces. Work with EE, layout, mechanical, vendor, and validation teams to review designs and resolve SI issues. Support simulation-to-measurement correlation using VNA, TDR, oscilloscope, BERT, or compliance test results. Qualifications Bachelor’s degree or above in Electrical Engineering, Electronics Engineering, or a related field. 5+ years of experience in high-speed signal integrity simulation and PCB channel design. Hands-on experience with Ansys simulation tools, such as HFSS, SIwave, Q3D, or AEDT. Familiar with high-speed interfaces, including: DDR4,DDR5 PCIe up to Gen5 IEEE 802.3by / 802.3bm / 802.3bs / 802.3cd,100G / 400G / 800G
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