Signal Integrity Engineer New Bristol, UK

Graphcore, Ltd.; Bristol; On-site; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Flexible working

Generous leave

Pension match

Phantom equity

Office barista and free food

Job summary

Graphcore is seeking a Signal Integrity Engineer to shape the electrical performance of its AI compute hardware. You will work on 112Gbps and 224Gbps SERDES, DDR and processor interfaces, guiding launches, vias, transmission lines and low-loss materials.

You will simulate, validate and bring through prototype bring-up, debugging and production support, collaborating with PCB, package and system teams to achieve best possible performance.

Qualifications

• Strong experience in high-speed digital circuit development and signal integrity.
• Expertise with GHz SERDES design and validation.
• Design of BGA, connectors launches, vias and transmission lines.

Responsibilities

• Design high-speed signal paths and define stack-ups for upgraded hardware.
• Develop, extract, and simulate PCB structures across production and test boards.
• Own SI decisions for complex board and package interfaces; collaborate cross-functionally.

Skills

High-speed design

Signal integrity

SERDES design

BGA launches

Lab measurements

Power integrity

Tools

ANSYS SIWave

HFSS

Mentor HyperLynx

Job description

Design the high-speed signal paths that let advanced AI compute systems perform at datacentre scale.

As a Signal Integrity Engineer, you will shape the electrical performance of Graphcore hardware platforms. Your work will help 112Gbps and 224Gbps SERDES, DDR and processor interfaces operate within demanding system budgets.

You will develop, extract and simulate PCB structures across production systems and test boards. You will define launches, via structures, transmission lines, stack-ups and low-loss materials for future designs.

This role spans simulation, lab validation and practical design influence. You will work from concept through prototype bring-up, debug, validation and support for manufacture.

The team and culture

You will join the Hardware Engineering team, working closely with PCB, package substrate, system architecture and supplier teams. Work moves through simulation, design review, lab evidence and practical trade-offs.

You will be expected to own signal integrity decisions across complex board and package interfaces. The team values careful analysis, pace and clear communication when problems need action.

Decisions are made close to the engineering detail. You will challenge designs, guide constraints and help teams reach the best performance possible.

What we’re looking for

• 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, with strong ownership and communication skills

While we have outlined a set of requirements, we value transferable skills and diverse experiences. If you meet most of our essential criteria, we encourage you to submit an application and showcase how your background makes you a strong candidate.

• Flexible working: Balance your work and personal life with greater flexibility
• Generous leave: Take time to rest, recharge and enjoy life outside of work
• Retirement planning support: Up to 5% matched pension
• Phantom equity: Share in Graphcore’s success
• Workplace experience: Enjoy thoughtfully designed office spaces for collaboration, with free food and an on-site barista to support your day
• Peace of mind protection: Income protection and life assurance to provide financial security for you and your loved ones
• Flexible benefits: Tailor your benefits package with a choice of additional options, including private medical insurance and dental cover
• Optional benefits: Dental cover, health cash plan, private medical insurance, cycle to work scheme, give as you earn

We welcome people from all backgrounds and experiences and are committed to building an inclusive environment where everyone can do their best work.
We’re an equal opportunity employer and recognise that everyone brings different strengths and perspectives. If you need any adjustments during the interview process, just let us know - we’re happy to support you.

Join the Team at Graphcore

Graphcore is one of the world’s leading innovators in Artificial Intelligence compute. It is developing hardware, software and systems infrastructure that will unlock the next generation of AI breakthroughs and power the widespread adoption of AI solutions across every industry.

As part of the SoftBank Group, Graphcore is a member of an elite family of companies responsible for some of the world’s most transformative technologies. Together, they share a bold vision: to enable Artificial Super Intelligence and ensure its benefits are accessible to everyone.

Graphcore’s teams are drawn from diverse backgrounds and bring a broad range of skills and perspectives. A melting pot of AI research specialists, silicon designers, software engineers and systems architects, Graphcore brings together deep expertise to solve complex problems and deliver meaningful progress in AI compute.

UK Demographic Data

We take pride in our commitment to creating an inclusive and diverse workplace. As part of our recruitment process, we ask for confidential diversity data from all applicants. This data will be anonymised so that no personal identification information will be collected, and is retained for statistical purposes only and is not attached to your application. Your responses to the following three questions will remain confidential and will not impact or be used in any way in regards to your application. We are only using this data to improve our hiring process to be inclusive of all diversity backgrounds.

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