Senior Processor Architect

London, United Kingdom
3 weeks ago
Seniority
Senior
Posted
13 Apr 2026 (3 weeks ago)
Fractile is building silicon, systems and software which will redefine the frontier of AI: running the world’s most advanced models at radically higher speed and lower cost. We have an exceptional team across hardware and software capable of bringing about this change, and we are growing fast to meet demand and deliver our product at scale.

As Processor Architect, you'll define and drive the architecture of our core compute engines, ISA definitions and programming models through to memory hierarchies, and on-chip interconnects. This isn't just about hitting PPA targets on a spreadsheet; you'll work closely with logical design, physical design, and verification teams to translate architectural intent into working silicon that performs in the real world. Expect to be hands-on in performance modelling, detailed specification writing, bottleneck analysis, pre and post-silicon validation. You'll be the driving force behind the computational heart of our products ensuring every cycle counts and every watt is well spent.

Key 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.

Skills & Experience

  • 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.

Desirable

  • Background in AI acceleration, vector/matrix compute, or domain-specific processor design.
  • Experience with architectural performance modelling tools and frameworks (gem5, SystemC, custom cycle-accurate simulators).
  • Familiarity with compiler and toolchain interactions, understanding how software maps to hardware.
  • Prior start-up or scale-up experience, someone who thrives in ambiguity and fast iteration.

How we work

  • Ownership and execution: you will have full agency to drive your work forward
  • Rapid iteration: we all work directly with top leadership to move from idea to hardware on ambitious timelines
  • Full-stack engagement: hardware, software, silicon, and modelling teams all work closely together to create a product with generational impact
  • Optimistic and pragmatic: we possess the will to win, and to do the hard work to get us there
  • Team player mentality: the mission is bigger than any of us, and we have the curiosity and technical focus to see the best idea shipped, no matter whose it is

About us

  • Founded in 2022, a team of 80+, which is expanding rapidly
  • Modern, open offices in London and Bristol
  • Collaborative, problem-solving culture built on deep curiosity, entrepreneurial initiative and technical fluency

Export control and security clearance

Certain roles may involve working on technologies subject to export restrictions. Applicants may be required to undergo additional eligibility checks to ensure compliance with applicable law.

Related Jobs

View all jobs
Spotlight

Semiconductor Test Engineering Team Leader

Fractile Bristol, United Kingdom
£80,000 – £120,000 pa On-site

Senior Processor Architect

Fractile London, United Kingdom

Senior FPGA Engineer

Technical Futures Ltd Sheffield Bottom, Berkshire, RG7 4BE, United Kingdom

Senior FPGA Engineer

Technical Futures Ltd Berkshire, United Kingdom
£40,000 – £60,000 pa Hybrid

Senior HPC Performance Engineer

NVIDIA Germany
£80,000 – £120,000 pa Remote

Senior HPC Performance Engineer

£80,000 – £120,000 pa Remote

Senior HPC Performance Engineer

£80,000 – £120,000 pa Remote

Industry Insights

Discover insightful articles, industry insights, expert tips, and curated resources.

Where to Advertise Semiconductor Jobs in the UK (2026 Guide)

Advertising semiconductor jobs in the UK requires a fundamentally different approach to most technical hiring. The candidate pool is one of the smallest and most specialised in any engineering discipline — spanning IC design engineers, process engineers, fab technicians, EDA tool developers, compound semiconductor physicists and power electronics specialists. General job boards are largely ineffective for semiconductor hiring. The community is tight-knit, highly academic in its roots and concentrated around a small number of university groups, fab facilities and design centres. Specialist boards, academic channels and direct community engagement are the primary sourcing strategies that work. This guide, published by SemiconductorJobs.co.uk, covers where to advertise semiconductor roles in the UK in 2026, how the main platforms compare, what employers should expect to pay, and what the data says about hiring across different role types.

Semiconductor Jobs UK 2026: What to Expect Over the Next 3 Years

Semiconductors are the foundational technology of the modern world. Every smartphone, electric vehicle, data centre, medical device, satellite, and AI accelerator depends on them. And yet for much of the past decade, the strategic importance of semiconductor design and manufacturing was something that governments, investors, and employers took largely for granted — until supply chain crises, geopolitical tensions, and the insatiable compute demands of artificial intelligence made the vulnerability of global semiconductor supply chains impossible to ignore. The response has been significant and sustained. The UK's National Semiconductor Strategy, the US CHIPS Act, the EU Chips Act, and parallel investment programmes across Japan, South Korea, and Taiwan have collectively committed hundreds of billions of pounds to semiconductor research, design, and manufacturing capability. In the UK specifically, that investment is beginning to translate into real hiring — across compound semiconductor manufacturing, chip design, semiconductor equipment, advanced packaging, and the growing ecosystem of fabless design companies that are choosing Britain as their base. For job seekers, the semiconductor jobs market of 2026 represents an opportunity that is more commercially urgent, more geographically distributed, and more technically diverse than at any previous point in the sector's UK history. The roles being created span the full semiconductor value chain — from fundamental materials research and process engineering through chip design, verification, and the software that makes silicon useful. The candidates who will thrive over the next three years are those who understand where that value chain is being built, which technical areas are attracting the most investment, and how to position their skills at the intersection of the sector's greatest needs. This article breaks down what the UK semiconductor jobs market is likely to look like through to 2028 — covering the titles emerging right now, the technologies driving employer demand, the skills that will matter most, and how to position your career at the leading edge of one of the most strategically important technology sectors in the UK economy.

New Semiconductor Employers to Watch in 2026: UK and International Companies Transforming Chip Careers

The semiconductor industry is entering a new era of investment, geopolitical significance, and technological innovation. As advanced chips power everything from artificial intelligence and edge computing to autonomous vehicles and 5G infrastructure, demand for skilled professionals across design, verification, fabrication, and test engineering continues to rise. For professionals exploring opportunities on www.SemiconductorJobs.co.uk , understanding which employers are scaling, raising funds, winning contracts, or establishing UK operations is critical. This article highlights the new semiconductor employers to watch in 2026, including UK innovators, major international players expanding locally, and emerging firms driving next‑generation semiconductor technologies.