Principal High-Speed I/O Architect (PCIe, CXL, UA Link)

Job Overview

At Arm, the High-Speed I/O Architect defines and designs innovative on-chip interconnect architectures—coherent and non-coherent—for scalable SoC platforms. You will work across markets including mobile, automotive, datacenter, networking, and IoT, contributing to production-quality silicon with top-tier performance and efficiency. Collaborating with multi-functional teams, you'll shape the interconnect infrastructure that powers next-generation SoCs.

Responsibilities

• Architect high-speed interconnect subsystems—including PCIe, CXL, and UA Link—and define coherent and non-coherent communication architectures across a range of silicon products.
• Define IP and subsystem roadmaps for high-speed I/O and interconnect technologies in close partnership with SoC architecture and core technology teams.
• Lead early architecture engagements with customers, shaping system requirements and delivering clear, implementation-ready specifications.
• Collaborate with performance, power, and physical design teams to optimize PCIe/CXL/UA Link subsystem behavior, bandwidth, latency, and overall system efficiency.
• Develop SoC architecture integrating Arm IP and high-speed I/O subsystems to meet compute, memory, and interconnect performance targets.
• Partner with software, firmware, and platform teams to optimize end-to-end solutions spanning hardware, drivers, and system software.
• Support detailed use-case exploration, workload analysis, and performance modeling to guide architectural decisions.

Required Skills and Experience

• 8+ years of experience with coherency protocols, hierarchical cache design, and system-level coherency architectures.
• Deep expertise in PCIe, CXL, and UA Link protocols, including link-level behavior, transaction flows, ordering models, memory expansion/pooling, die-to-die or chiplet connectivity, and host/device integration.
• Consistent track record collaborating with performance, power, and physical design teams on the PCIe, CXL, and UA Link stack.
• Strong knowledge in areas such as heterogeneous compute, PCIe/CXL/UA Link subsystem design, security, caching, memory systems.
• Demonstrated communication and leadership skills with the ability to influence executive stakeholders and multi-functional teams.
• Bachelor’s or Master’s degree (or equivalent) in Electrical or Computer Engineering with 10+ years of experience in semiconductor architecture, design, or related roles.

Nice To Have Skills and Experience

• Ability to thrive in dynamic environments with shifting priorities.
• Constructive, strategic approach to challenge and improve status quo.
• Track record of delivering complex projects on time and to spec.

In Return

This will be a fast-paced and exciting environment with opportunities to demonstrate your strategic and innovative thinking while directly contributing to current projects.

Salary Range

$262,700-$355,400 per year

Hybrid Working at Arm

We believe in bringing people together face to face to enable us to work at pace, whilst recognizing the value of flexibility. Within that framework, we empower groups/teams to determine their own hybrid working patterns, depending on the work and the team’s needs.

Equal Opportunities at Arm

Arm is an equal opportunity employer, committed to providing an environment of mutual respect where equal opportunities are available to all applicants and colleagues. We are a diverse organization of dedicated and innovative individuals, and don’t discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.