← All roles

Processor Architect

Fractile· Silicon
Apply on company site
Hybrid (London)Posted 3mo ago

About the role

Fractile is building chips and systems to accelerate frontier AI inference. As Processor Architect, you will define and drive the architecture of core compute engines, ISA definitions, programming models, memory hierarchies, and on-chip interconnects, collaborating with design, verification, and physical teams to deliver silicon that performs in the real world.

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 architectureRTL design and physical design feedbackPerformance/power budgetingCross-disciplinary collaborationCommunication

Benefits

  • Competitive salary
  • 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: committed to Equal Employment Opportunity and inclusive environment.
Last updated Oct 15, 2026. Interested? Apply on the company site.
Fractile logo

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
Company profileWebsite

More open roles at Fractile