DFT Engineer

DFT Engineer

Fractile is building the silicon, systems and software to break through the memory wall, the fundamental hardware constraint standing between today's AI and what comes next.

The frontier of AI is no longer a research problem. The tasks AI can complete are doubling in complexity every six to seven months and the tokens required to complete them are scaling with it. Sequential reasoning, the kind that can't be parallelised away, means the internal clock speed of inference systems is the critical constraint. What stands between where we are today and the future potential of AI isn't smarter algorithms; it's the hardware to run them fast enough to matter.

Today's chips are hitting their wall. We're building the ones that don't.

Fractile is seeking to increase the clock speed of global progress, one chip at a time.

Join the team implementing DFT for a large, multi-core AI accelerator ASIC. You will work on scan, ATPG, and memory test, contributing to a robust and scalable test solution while developing your expertise in advanced SoC design.

Key Responsibilities

• Contribute to the DFT architecture of a multi-core AI accelerator SoC
• Drive integration of DFT tools into the EDA flow
• Implement scan insertion, compression, and test logic
• Generate and analyze ATPG patterns for structural faults
• Support MBIST implementation for embedded memories
• Work with physical design to ensure clean scan chain implementation and timing closure
• Develop scripts and automation to improve DFT workflows
• Support silicon bring-up, debug, and test analysis
• Work with test and product engineering teams to bring up and debug ATPG patterns on ATE, supporting production test and yield ramp

Required Experience

• Degree in Electrical Engineering, Computer Engineering, or similar
• Experience in DFT, digital design, or related ASIC development
• Good understanding of scan, ATPG, memory BIST and digital test concepts
• Familiarity with mainstream EDA tools
• Scripting skills (Python, Tcl, or similar)

Profile

• Eager to learn and grow in DFT and large-scale ASIC design
• Detail-oriented and comfortable working with complex systems
• Collaborative and responsive in a fast-moving team

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 who’s it i

  About us:

  • Founded 2022, we're 100+ people across London and Bristol, in the heart of the UK's frontier AI ecosystem, and growing fast.

  • We offer competitive salaries, meaningful equity, and standard company benefits.

  • We believe the hardest problems get solved by the broadest range of minds. We actively encourage applications from underrepresented groups in hardware and software engineering.

  • Hybrid working; 2-3 days in our London and Bristol offices.

  Export controls:

  Our work involves technologies subject to UK and international export control regulations. Certain roles may require additional eligibility checks to ensure compliance with applicable law. We'll be transparent about this throughout the hiring process.