Senior/Principal DFT Engineer
Job description
Own and define the DFT architecture for a large AI accelerator SoC, setting DFT strategy, methodology, flow and signoff criteria and mentoring DFT engineers. The role supports bringing ATPG patterns to production test and yield ramp.
At a glance
- Work mode
- Remote · United Kingdom
What you'll do
- Own and define the DFT architecture for a large AI accelerator SoC (scan, compression, MBIST, LBIST, boundary scan)
- Set DFT strategy, methodology, flow and signoff criteria
- Drive integration of DFT tools and flows into the overall EDA environment
- Define hierarchical DFT approach for multi-core designs and large memory systems
- Define scan architecture, compression strategy, and ATPG approach
- Define memory test and repair strategy for large embedded RAM
- Establish power-aware and at-speed test strategies
- Work closely with RTL and physical design to ensure clean DFT integration and timing closure
- Work with test and product engineering teams to bring up and debug ATPG patterns on ATE, supporting production test and yield ramp
- Mentor and guide DFT engineers
What we're looking for
- Strong experience in DFT for complex ASIC/SoC designs (typically 8+ years)
- Proven ownership of DFT architecture on at least one large tapeout
- Deep expertise in scan, compression, ATPG, and MBIST
- Experience with industry tools (Synopsys or Tessent)
- Strong understanding of clocking, resets, power domains, and physical constraints
- Experience with silicon bring-up, debug, and yield ramp
- Comfortable owning ambiguous, high-impact problems
- Balances architectural thinking with hands-on execution
- Sets direction while staying close to implementation details
Benefits
- Competitive salary reflective of your experience and the specialist nature of the role
- Equity & Ownership: meaningful equity so everyone shares in the value creation
- Private Medical, Dental and Vision
- Contributory Pension
- 25 Days holiday plus bank holidays
- Life/Critical Illness Insurance
- Diverse & fun office
Apply
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About Fractile
Fractile was founded in 2022 on the bet that the world's most capable AI systems would be limited in their impact by the time taken to produce useful outputs. They build chips and systems that efficiently generate output at thousands of tokens per second while handling the complexity and capacity challenges of operating large models at very long contexts.
Mission
To radically re-invent the hardware that frontier AI models run on, making inference speed viable at scale.
Key facts
- 2022
- Raised $220M from investors including Founders Fund and Accel
- Work involves technologies subject to UK, US and other international export control regulations
Partners & customers
What they value
- We believe the hardest problems get solved by the broadest range of minds
- Committed to Equal Employment Opportunity through attracting and retaining a diverse team and building an inclusive environment