Fractile is a UK AI hardware startup building next-generation inference chips and systems for frontier AI.
<div class="p-pdf_iframe__page" data-page-number="1"> <div class="textLayer"> <div class="p-workspace__primary_view_body"> <div class="p-message_pane p-message_pane--classic-nav p-message_pane--scrollbar-float-adjustment p-message_pane--with-bookmarks-bar" data-qa="message_pane"> <div id="message-list"> <div id="message-list" class="c-virtual_list c-virtual_list--scrollbar c-message_list c-scrollbar c-scrollbar--fade"> <div class="c-scrollbar__hider" data-qa="slack_kit_scrollbar"> <div class="c-scrollbar__child"> <div class="c-virtual_list__scroll_container" data-qa="slack_kit_list"> <div id="message-list_1759822621.811129" class="c-virtual_list__item" data-qa="virtual-list-item" data-item-key="1759822621.811129"> <div class="c-message_kit__background c-message_kit__background--hovered p-message_pane_message__message c-message_kit__message" data-qa="message_container" data-qa-unprocessed="false" data-qa-placeholder="false"> <div class="c-message_kit__hover c-message_kit__hover--hovered" data-qa-hover="true"> <div class="c-message_kit__actions c-message_kit__actions--default"> <div class="c-message_kit__gutter"> <div class="c-message_kit__gutter__right" data-qa="message_content"> <div class="c-message_kit__blocks c-message_kit__blocks--rich_text"> <div class="c-message__message_blocks c-message__message_blocks--rich_text" data-qa="message-text"> <div class="p-block_kit_renderer" data-qa="block-kit-renderer"> <div class="p-block_kit_renderer__block_wrapper p-block_kit_renderer__block_wrapper--first"> <div class="p-rich_text_block"> <div class="p-rich_text_section"> <p>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.</p> <p>This role will design, implement, and support production-ready board/PCBA test solutions for a high-volume board integrating multiple AI accelerator chips, high-current power delivery, embedded control, and PCIe Gen6 interconnect. This is a hands-on individual contributor role focused on executing the board test strategy defined by the Board Test Engineering Lead and delivering robust, repeatable tests for offshore manufacturing.</p> <p><strong>Key Responsibilities </strong></p> <ul> <li>Develop and maintain board/PCBA manufacturing test content for complex, high-power, high-speed boards.</li> <li>Implement and debug test coverage across ICT, boundary scan/JTAG, and functional test stages.</li> <li>Design and support board-level functional test solutions, including fixtures, probes, cabling, and instrumentation.</li> <li>Develop and maintain MCU-based board test firmware for manufacturing diagnostics, self-test, and telemetry validation.</li> <li>Implement tests for detecting assembly defects, component failures, solder issues, and manufacturing marginalities.</li> <li>Develop PCIe-focused board-level tests to verify chip-to-chip connectivity and integrity.</li> <li>Support bring-up and debug of board test stations at offshore EMS/CM sites.</li> <li>Analyze test failures and yield data to identify root causes and recommend corrective actions.</li> <li>Work closely with hardware, firmware, and SI/PI teams to close board-level testability gaps.</li> <li>Contribute to test documentation including test specifications, debug procedures, and manufacturing release notes.</li> <li>Support fixture qualification, tester correlation, and ongoing test maintenance.</li> </ul> <p><strong>Required Qualifications</strong></p> <ul> <li>4–7 years of experience in board or PCBA test engineering in a high-volume manufacturing environment.</li> <li>Hands-on experience with functional test development, ICT, and boundary scan/JTAG.</li> <li>Experience designing or supporting test fixtures and automated test stations.</li> <li>Working knowledge of high-speed digital interfaces and board-level failure modes.</li> <li>Experience developing or supporting embedded test firmware on MCUs.</li> <li>Strong debug skills spanning digital logic, power delivery, and interconnect issues.</li> <li>Ability to work effectively with offshore manufacturing partners.</li> </ul> <p><strong>Preferred Qualifications</strong></p> <ul> <li>Experience testing boards with AI accelerators, GPUs, networking ASICs, or similar high-power devices.</li> <li>Familiarity with high-current VRMs, multiphase power converters, and power integrity testing.</li> <li>Exposure to PCIe Gen5/Gen6 or other high-speed serial links in a production test environment.</li> <li>Experience using factory data systems and yield analysis to improve test coverage and throughput.</li> <li>Experience supporting board test during NPI, ramp, and sustained production.</li> </ul> <p><strong>How we work</strong></p> <ul> <li>Ownership and execution: you will have full agency to drive your work forward</li> <li>Rapid iteration: we all work directly with top leadership to move from idea to hardware on ambitious timelines</li> <li>Full-stack engagement: hardware, software, silicon, and modelling teams all work closely together to create a product with generational impact</li> <li>Optimistic and pragmatic: we possess the will to win, and to do the hard work to get us there</li> <li>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 is</li> </ul> <p><strong>About us</strong></p> <ul> <li>Founded in 2022, team of 70+ which is expanding rapidly</li> <li>Modern, open offices in London and Bristol</li> <li>Collaborative, problem-solving culture built on deep curiosity, entrepreneurial initiative and technical fluency</li> </ul> <p><strong>Export control and security clearance</strong></p> <p>Certain roles may involve working on technologies subject to export restrictio