{"id":3783092,"url":"https://alion.io/job/fractile-seniorprincipal-dft-engineer-2","title":"Senior/Principal DFT Engineer","company":{"id":51523,"name":"Fractile","domain":"fractile.ai","url":"https://alion.io/company/fractile","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":null},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"lead","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["London, United Kingdom","Bristol, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Tessent","optional":false}],"status":"live","first_seen_at":"2026-10-28T14:28:13Z","employer_posted_date":"2026-10-28","last_verified_at":"2026-11-09T06:51:59Z","board_verified":true,"closed_at":null,"days_open":11,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":11},"description":"About Fractile\nFractile was founded in 2022 on the bet that, eventually, the world’s most capable AI systems would be limited in their impact by the time taken to produce useful outputs. We bet everything on the logical conclusion: that the only way to truly unlock this latent value, to make speed viable at scale, was to radically re-invent the hardware that we run our frontier AI models on. Ever since, we have been building chips and systems that tackle this problem: how to efficiently generate output at thousands of tokens per second, while handling the complexity and capacity challenges of operating large models at very long contexts.\nThe workloads that push to the limits of the current frontier are already transformational; it is the technical and economic limits on inference speed that are constraining progress. The defining work of the 21st century will be marked by the engine of inference delivering immense and diffuse chains of intellectual inquiry, in drug discovery, in software engineering, in materials discovery, in any field where progress is driven by deep reasoning and intelligence to resolve complex problems. \nKey Responsibilities\nOwn and define the DFT architecture for a large AI accelerator SoC (scan, compression, MBIST, LBIST, boundary scan)\n\nSet DFT strategy, methodology, flow and signoff criteria\n\nDrive integration of DFT tools and flows into the overall EDA environment\n\nDefine hierarchical DFT approach for multi-core designs and large memory systems\n\nDefine scan architecture, compression strategy, and ATPG approach\n\nDefine memory test and repair strategy for large embedded RAM\n\nEstablish power-aware and at-speed test strategies\n\nWork closely with RTL and physical design to ensure clean DFT integration and timing closure\n\nWork with test and product engineering teams to bring up and debug ATPG patterns on ATE, supporting production test and yield ramp\n\nMentor and guide DFT engineers\n\nRequired Experience\nStrong experience in DFT for complex ASIC/SoC designs (typically 8+ years)\n\nProven ownership of DFT architecture on at least one large tapeout\n\nDeep expertise in scan, compression, ATPG, and MBIST\n\nExperience with industry tools (Synopsys or Tessent)\n\nStrong understanding of clocking, resets, power domains, and physical constraints\n\nExperience with silicon bring-up, debug, and yield ramp\n\nProfile\nComfortable owning ambiguous, high-impact problems\n\nBalances architectural thinking with hands-on execution\n\nSets direction while staying close to implementation details\n\nWhat We Offer\nCompetitive salary: A competitive salary reflective of your experience and the specialist nature of the role.\n\nEquity & Ownership: meaningful equity so everyone shares in the value creation\n\nBenefits: Private Medical, Dental and Vision, Contributory Pension, 25 Days holiday plus bank holidays and Life/Critical Illness Insurance.\n\nDiverse & fun office: we believe the hardest problems get solved by the broadest range of minds. We are committed to Equal Employment Opportunity through attracting and retaining a diverse team and building an inclusive environment.\n\nFractile is seeking to increase the clock speed of global progress, one chip at a time. We’ve recently raised $220M from investors including Founders Fund and Accel and our most important work lies ahead. Join us!\n Export controls\nOur work involves technologies subject to UK, US and other 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.","description_format":"text","description_chars":3599,"description_truncated":false,"requirements":{"experience_years_min":8,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Equity"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","Foundation Models","AI Compute & Inference","AI Chips & Accelerators"],"lifecycle":[{"event":"open","at":"2026-11-05T01:59:07Z"}],"visa":[{"country":"GB","licensed_sponsor":true,"adverts_offering_sponsorship_24m":0,"sanctioned_now":false,"evidence":"Licensed UK visa sponsor (Skilled Worker)","filings_12m":null,"filings_prev_12m":null,"green_card_filings_12m":null,"median_offered_wage_usd":null,"route":"Skilled Worker","cap_exempt":false,"checked_at":"2026-11-09T07:32:21+00:00","sources":["UK Home Office: register of licensed sponsors (workers)"],"filings_for_role_12m":0}],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":11,"expected_fill_days":160,"reasons":["conf:3","velocity","win:early"],"computed_at":"2026-11-09T06:03:00Z"},"pay":null,"html_url":"https://alion.io/job/fractile-seniorprincipal-dft-engineer-2","json_url":"https://alion.io/job/fractile-seniorprincipal-dft-engineer-2.json","meta":{"generated_at":"2026-11-09T09:16:17Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":8625,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-10T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":51523},"rest":"https://alion.io/mcp/rest/get_company?id=51523"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ffractile-seniorprincipal-dft-engineer-2"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Ffractile-seniorprincipal-dft-engineer-2"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Ffractile-seniorprincipal-dft-engineer-2"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/fractile-seniorprincipal-dft-engineer-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ffractile-seniorprincipal-dft-engineer-2"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3783092}},{"tool":"search_jobs","arguments":{"company":"fractile.ai","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3783092},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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