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

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 chipping in to current projects.Arm is proud to have a set of behaviors that reflect our culture and guide our decisions, defining how we work collaboratively to defy ordinary and shape extraordinary!Partner and Customer FocusCollaboration and CommunicationCreativity and InnovationTeam and Personal DevelopmentImpact and InfluenceDeliver on Your PromisesWe will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.Our 10x mindset guides how we engineer, collaborate, and grow. Understand what it means and how to reflect 10x in your work: #LI-MS1 Salary Range:$262,700-$355,400 per yearWe value people as individuals and our dedication is to reward people competitively and equitably for the work they do and the skills and experience they bring to Arm. Salary is only one component of Arm's offering. The total reward package will be shared with candidates during the recruitment and selection process.Accommodations at ArmAt Arm, we want to build extraordinary teams. If you need an adjustment or an accommodation during the recruitment process, please email View email address on apply.placed-app.com. To note, by sending us the requested information, you consent to its use by Arm to arrange for appropriate accommodations. All accommodation or adjustment requests will be treated with confidentiality, and information concerning these requests will only be disclosed as necessary to provide the accommodation. Although this is not an exhaustive list, examples of support include breaks between interviews, having documents read aloud, or office accessibility. Please email us about anything we can do to accommodate you during the recruitment process.Hybrid Working at ArmArm’s approach to hybrid working is designed to create a working environment that supports both high performance and personal wellbeing. 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. Details of what this means for each role will be shared upon application. In some cases, the flexibility we can offer is limited by local legal, regulatory, tax, or other considerations, and where this is the case, we will collaborate with you to find the best solution. Please talk to us to find out more about what this could look like for you.Equal Opportunities at ArmArm 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.