Ubiquiti

Delivers enterprise and consumer networking gear

SI Simulation Engineer

Board & Electronics DesignConfirmed live in the last 24 hours

Full-timeTaipei City, TaiwanNo salary listedIn-person

About the Job

Requirements

A bachelor's degree or above in Electrical Engineering, Electronics Engineering, or a related field.
At least 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.
Familiarity with high-speed interfaces including DDR4 and DDR5, PCIe up to Gen5, and IEEE 802.3by, 802.3bm, 802.3bs, and 802.3cd, including 100G, 400G, and 800G Ethernet.
Strong understanding of high-speed channel behavior, including insertion loss, return loss, crosstalk, impedance discontinuity, jitter, eye diagrams, and bit error rate.
Ability to define practical PCB routing constraints and provide design recommendations.

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 diagrams, and bit error rate 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 signal integrity issues.
Support simulation-to-measurement correlation using VNA, TDR, oscilloscope, BERT, or compliance test results.

Desired Qualifications

Experience with 25G, 56G, or 112G SerDes channel design.
Experience with switch, router, server, NIC, AI server, or high-speed backplane products.
Knowledge of low-loss PCB materials, dielectric constant and dissipation factor (Dk/Df), copper roughness, and glass weave effects.
Familiarity with IBIS-AMI models, S-parameters, equalization tuning, and channel operating margin analysis.
Experience creating signal integrity simulation reports, layout guidelines, and design checklists.
Experience supporting lab validation and debugging signal integrity-related issues.

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 Ethernet
Strong understanding of high-speed channel behavior, including insertion loss, return loss, crosstalk, impedance discontinuity, jitter, eye diagram, and BER.
Ability to define practical PCB routing constraints and provide design recommendations.

Preferred Qualifications

Experience with 25G / 56G / 112G SerDes channel design.
Experience with switch, router, server, NIC, AI server, or high-speed backplane products.
Knowledge of low-loss PCB materials, Dk/Df, copper roughness, and glass weave effects.
Familiar with IBIS-AMI models, S-parameters, equalization tuning, and channel operating margin analysis.
Experience creating SI simulation reports, layout guidelines, and design checklists.
Experience supporting lab validation and debugging SI-related issues.

About the Company

Ubiquiti

Delivers enterprise and consumer networking gear

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.

Company size: 1,001-5,000
Company stage: IPO
Headquarters: New York City, New York
Founded: 2003

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