Signal Integrity Engineer - Bristol, United Kingdom
Originally posted 22 July 2026 by the employer.
About the role
This role involves designing high-speed signal paths for advanced AI compute systems.
What you'll do
- Develop, extract, and simulate PCB structures across production systems and test boards.
- Define launches, via structures, transmission lines, stack-ups, and low-loss materials.
- Engage in simulation, lab validation, and practical design influence from concept through debug and validation.
- Own signal integrity decisions across complex board and package interfaces.
- Challenge designs, guide constraints, and help teams achieve optimal performance.
What you'll need
- Strong experience in high-speed digital circuit development with deep signal and power integrity knowledge.
- Experience with high-frequency SERDES design and validation, including tens of GHz operation.
- Expertise using tools such as ANSYS SIWave, HFSS, Mentor HyperLynx or similar.
- Ability to design BGA and connector launches, via structures, and transmission lines for GHz signals.
- Hands-on lab experience using VNAs, high-speed oscilloscopes, and signal generators.
- Rigorous approach to design, debug, and validation.
Skills: Signal Integrity, high-speed SERDES, 112Gbps/224Gbps, DDR interfaces, ANSYS SIWave, HFSS
This role has been open 69 days — below the 78-day median for High-Speed IO/SerDes Design roles.
High-Speed IO/SerDes Design · Serdes Highspeed
|
Open roles in category
238
|
Median days open
78 d
|
Median salary
$177k
|
See the full market breakdown ▾Category comparison, skills in demand, and who else is hiring
| Metric | Graphcore | All employers we track in this specialty (238 roles · 49 employers) |
|---|---|---|
| Open roles in this specialty | 3 | 238 |
| Open roles in the wider Analog & Mixed-Signal family | 6 | 1385 · 107 employers |
| Median days open | 69 d | 78 d (−9 d vs this employer) |
| Median salary (USD postings) | — | $177k |
Skills observed across this category: Signal Integrity, high-speed SERDES, 112Gbps/224Gbps, DDR interfaces, ANSYS SIWave, HFSS
Who's hiring in this category
- AMD · 27 open roles · median 66 d
- Synopsys · 25 open roles · median 46 d
- Qualcomm · 20 open roles · median 57 d
- Cadence Design Systems · 18 open roles · median 180 d
- Micron Technology · 11 open roles · median 75 d
- Apple · 10 open roles · median 12 d
How we counted: 238 open High-Speed IO/SerDes Design (Serdes Highspeed) roles from 49 employers tracked in the SemiconductorJobs index, counted 29 Sept 2026. Specialty figures count only roles carrying this exact specialty label, so an employer's related work in neighbouring specialties is not included there — it is counted in the wider Analog & Mixed-Signal family row. Figures refresh nightly.