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Processor Architect

Fractile· Silicon
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Hybrid (Bristol)$0Full-timePosted 3mo ago

About the role

Fractile is hiring a Processor Architect to define and drive the architecture of core compute engines, ISA definitions and programming models through to memory hierarchies and on-chip interconnects. The role involves hands-on performance modelling, detailed specification writing, bottleneck analysis, and pre/post-silicon validation, ensuring silicon delivers real-world performance and power efficiency.

Responsibilities

  • Define and own the compute engine architecture specifications, balancing performance, flexibility, power, area, and design complexity.
  • Lead architectural exploration from early concept through to specification, coordinating with modelling, implementation, verification, and physical design teams.
  • Specify execution units, memory hierarchy, instruction sets and flow — making principled trade-offs at every level.
  • Help build and maintain performance models and simulators to guide architectural decisions with data.
  • Partner with the system architecture and software/modelling teams to ensure the processor delivers real-world application performance, not just benchmark wins.
  • Evaluate emerging techniques — compact number formats, novel compute paradigms, advanced packaging options — to inform the architectural roadmap.
  • Act as a technical mentor, raising the bar for rigour in performance analysis and architectural documentation across the team.
  • Represent compute engine architecture in technical reviews, partner discussions, and customer engagements.

Qualifications

  • Proven experience as a Processor Architect, CPU/GPU Architect, or similar role in semiconductor or high-performance computing domains.
  • Deep understanding of compute engine and processor architecture and design, including matrix and vector centric floating-point arithmetic and memory hierarchies.
  • Strong grasp of RTL design flows and physical design constraints and how they feed back into architectural choices.
  • Experience taking processor designs from early exploration through to tapeout and post-silicon performance characterisation.
  • Demonstrated ability to define and manage performance and power budgets and navigate complex trade-offs.
  • Comfortable working across many disciplines, including architecture, modelling, implementation, verification, and software.
  • Excellent communicator who can bridge architectural depth with system-level and product-level context.

Skills

Required:Processor architectureCompute engine designRTL and physical design feedbackPerformance modellingCross-disciplinary collaborationCommunication

Benefits

  • Competitive salary: A competitive salary reflective of your experience and the specialist nature of the role.
  • Equity & Ownership: meaningful equity so everyone shares in the value creation.
  • Benefits: Private Medical, Dental and Vision, Contributory Pension, 25 Days holiday plus bank holidays and Life/Critical Illness Insurance.
  • Diverse & fun office: we are committed to Equal Employment Opportunity through attracting and retaining a diverse team and building an inclusive environment.
Last updated Oct 15, 2026. Interested? Apply on the company site.
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About Fractile

Radically Accelerate Frontier Model Inference

Fractile is designing AI compute systems that will enable the next generation of AI scaling: frontier model inference, 25x faster, at 1/10th the cost.

frontier model inferenceAI computecompute systemsAI scalinginference hardwareprocessor innovation
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