Server CPU Clock Physical Design Engineer, Staff level - Cambridge, UK Cambridge, United Kingdom CPU Engineering

QUALCOMM, Inc.; Cambridge; Remote; GBP 110,000 - 140,000; Full time

Benefits offered by this job

Relocation support

Equity opportunities

Health benefits

Pension plan

Education assistance

Job summary

Qualcomm Cambridge hosts the Nuvia Data Center CPU team, focusing on high-frequency, power-efficient server-class CPUs. As a CPU Clock Physical Design Engineer, you will shape clocking architecture, design robust clock networks, and partner with CAD, RTL, and circuit teams to ensure signoff-ready implementations.

You will apply SPICE-based validation, timing analysis, and multi-domain optimization across process and temperature.

Qualifications

• Bachelor’s degree in Electrical Engineering, Computer Engineering, Computer Science, or related field.
• Experience in hardware engineering, CPU design, physical design, clock design, or implementation.
• Strong knowledge of clocking, timing, and power-aware design.

Responsibilities

• Define and drive clock generation and distribution methodology.
• Collaborate with CAD, RTL, and circuit teams on clocking requirements.
• Develop low-skew, low-power clock networks (H-tree, mesh, spines).
• Validate clock circuits with SPICE and perform timing analyses.

Skills

CPU clocking

Physical design

Timing analysis

Power optimization

Clock networks

Education

Bachelor’s degree in Electrical Engineering/Computer Engineering/Computer Science

Master’s degree in Electrical Engineering/Computer Engineering/Computer Science

PhD in Electrical Engineering/Computer Engineering/Computer Science

Tools

SPICE

EDA tools

Clock-tree synthesis

Job description

**Job Overview**Qualcomm is seeking an experienced **CPU Clock Physical Design Engineer** to join the **Nuvia Data Center CPU team in Cambridge, UK**. The team is developing next-generation, high-performance, power-efficient custom CPU technology for advanced compute and server-class platforms that will help transform the industry.In this role, you will help define, implement, and optimize best-in-class clock generation and distribution solutions for high-frequency CPU designs. You will work closely with microarchitecture, RTL design, CAD, circuit design, block-level physical design, and top-level physical design teams to deliver robust, low-skew, low-power clocking solutions for next-generation CPUs.This is a high-impact technical role for engineers who enjoy solving complex clocking, timing, power, and implementation challenges. You will have the opportunity to influence CPU clocking architecture and methodology from early design planning through physical implementation, signoff, and silicon correlation.This position is open for **Staff Engineer** level, with scope, ownership, and technical leadership scaled according to experience.**Key Responsibilities will include**As a **Server CPU Clock Physical Design Engineer**, you will:* Define and drive the overall **clock generation and clock distribution methodology** for next-generation data center CPU designs.* Work with microarchitecture, RTL, CAD, circuit, block-level physical design, and top-level physical design teams to understand, implement, and validate CPU clocking requirements.* Architect, implement, and optimize low-skew, low-power clock networks using approaches such as **clock H-trees, clock mesh, clock spines clocking methodologies*** Partner with CAD and physical design teams to develop and deploy clocking techniques that optimize skew, latency, clock power, timing margin, routability, and design convergence.* Use SPICE simulation and circuit-level analysis to validate clock circuits, clock paths, and electrical behaviour across process, voltage, and temperature conditions.* Analyse and debug clock-related timing, power, noise, variation, and physical implementation issues across multiple modes, corners, and operating conditions.* Provide feedback and guidance to block-level and top-level physical design engineers on required clocking fixes, optimization opportunities, and signoff risks.* Collaborate with PLL, timing, power, CAD, and implementation teams to align clock source assumptions, jitter budgets, clock uncertainty, and signoff methodology.* Develop, document, and improve clock construction, analysis, and validation flows for future CPU generations.* For Staff-level candidates, provide technical leadership, mentor engineers, influence cross-functional methodology, and drive resolution of critical clocking challenges.**Required Skills and Experience**We are looking for candidates with strong experience in **CPU clocking, physical design, timing, and circuit-aware implementation**.The ideal candidate will have:* Strong experience in the construction and analysis of **low-skew and low-power clock generation and distribution networks**.* Hands-on experience with clock distribution structures and methodologies such as Clock H-tree, Clock Mesh, Clock Spines* Strong understanding of CTS, clock balancing, insertion delay, skew optimization, useful skew, clock power reduction, and clock latency trade-offs.* Good understanding of device physics, RC delay, signal integrity, variation, and electrical effects that influence clock quality and timing robustness.* Proficiency in **SPICE simulation and analysis** for circuit design, clock-path validation, and electrical verification.* Strong understanding of static timing analysis and the interaction between clock architecture, timing closure, jitter, uncertainty, OCV/AOCV/POCV, setup/hold closure, and signoff quality.* Ability to debug complex clocking issues across implementation, timing, power, noise, variation, and circuit domains.* Experience working with industry-standard EDA implementation and signoff flows for physical design, timing analysis, power analysis, and physical verification.* Strong communication skills and the ability to work effectively with global, cross-functional engineering teams.**Minimum Qualifications**Candidates should typically have one of the following:* Bachelor’s degree in **Electrical Engineering, Computer Engineering, Computer Science**, or a related technical field with relevant experience in hardware engineering, CPU design, physical design, clock design, or implementation.**OR*** Master’s degree in **Electrical Engineering, Computer Engineering, Computer Science**, or a related technical field with relevant experience in hardware engineering, CPU design, physical design, clock design, or implementation.**OR*** PhD in **Electrical Engineering, Computer Engineering, Computer Science**, or a related technical field with relevant experience in CPU design, physical implementation, clock design, or circuit-aware methodology.The role is intended for experienced candidates and is open for **Staff Engineer** level.**Preferred Qualifications**Experience in any of the following areas would be highly valuable:* Experience defining or deploying clock methodology across multiple designs, projects, or technology generations.* Strong background in chip-level or top-level physical design, block integration, standard-cell optimization, and clock construction.* Experience working in advanced semiconductor process nodes, especially **7nm and below**.* Proficiency with PLL specifications, clock source modelling, skew estimation, jitter budgeting, and jitter measurements. Experience with high-frequency CPU or high-performance compute clocking.* Experience with power-aware clocking, clock gating, resonant or mesh-based clocking strategies, and clock power optimization.* Familiarity with multi-corner multi-mode timing closure and variation-aware implementation methodologies.* Experience developing automation or analysis flows using **TCL, Python, Perl**, or similar scripting languages.* For Staff-level candidates, demonstrated ability to lead technical initiatives, influence cross-functional teams, define methodology, and mentor other engineers.**What We Value**We are especially interested in engineers who:* Have deep clocking, timing, and physical design fundamentals.* Enjoy solving difficult clock distribution, skew, jitter, power, and signoff challenges.* Can balance circuit-level detail with top-level implementation and product-level constraints.* Are passionate about enabling high-frequency, power-efficient data center CPU designs.* Bring a structured, analytical, and data-driven approach to debug and methodology improvement.* Communicate clearly across microarchitecture, RTL, circuits, CAD, timing, and physical design teams.* Demonstrate ownership, technical curiosity, and a continuous-improvement mindset.**Benefits and Perks**At Qualcomm, you will be part of a collaborative engineering culture focused on innovation, technical excellence, and meaningful product impact.We offer:* Competitive compensation package, including base salary, performance-related bonus, and equity opportunities.* Employee Stock Purchase Plan and equity programs supporting employee share ownership and long-term participation in Qualcomm’s success.* Pension and retirement support, including a matching pension scheme.* Health and wellbeing benefits, including medical, life, income protection, and wellbeing resources.* Maternity, paternity, family, and extended leave support to help employees balance professional and personal commitments.* Education assistance and tuition support to enable continued learning and professional development.* Relocation and immigration support where applicable, particularly for strong candidates moving to join the Cambridge team.* Employee assistance and resilience programs supporting mental wellbeing, balance, and personal resilience.* Opportunities to connect through employee networks, community programs, volunteering, and social groups that support inclusion, collaboration, and community engagement.* Subsidised wellbeing and lifestyle benefits, which may include gym or fitness support, bicycle purchase schemes, and employee clubs.* A flexible, collaborative, and technically challenging work environment, with the opportunity to work alongside highly skilled engineers on advanced CPU technology.**Why Join the Nuvia Data Center CPU Team in Cambridge?** Cambridge is Qualcomm’s largest office in the UK, with approximately 400 team members across engineering, business strategy, and support functions. From an engineering perspective, the Cambridge site includes teams focused on RF and PMU analog design, digital design and verification, digital physical design, embedded software, packaging, and post-silicon validation. Target products include high-performance CPUs and GPUs, ultra-low-power IoT devices, and wearables such as smart glasses, smart watches, and earbuds.The Nuvia Data Center CPU team is building advanced custom CPU technology for next-generation compute platforms. As a **CPU Clock Physical Design Engineer**, you will play a key role in shaping the clocking architecture and physical implementation methodology that enables high-frequency, power-efficient server-class CPU products.This is an opportunity to work on technically demanding CPU clocking challenges, influence future-generation design methodology, and make a direct impact on world-class silicon products**Minimum Qualifications:**• Bachelor's degree in Science, Engineering, or related field and 4+ years of ASIC design, verification, validation, integration, or related work experience. OR Master's degree in Science, Engineering, or related field and 3+ years of ASIC design, verification, validation, integration, or related work experience. OR PhD in Science, Engineering, or related field and 2+ years of ASIC design, verification, validation, integration, or related work experience.\\*References to a particular number of years experience are for indicative purposes only. Applications from candidates with equivalent experience will be considered, provided that the candidate can demonstrate an ability to fulfill the principal duties of the role and possesses the required competencies.Qualcomm is an equal opportunity employer. If you are an individual with a disability and need an accommodation during the application/hiring process, rest assured that Qualcomm is committed to providing an accessible process. You may e-mail [e-mail] or call Qualcomm's toll-free number found here. Upon request, Qualcomm will provide reasonable accommodations to support individuals with disabilities to be able participate in the hiring process. Qualcomm is also committed to making our workplace accessible for individuals with disabilities. (Keep in mind that this email address is used to provide reasonable accommodations for individuals with disabilities. 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