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.

We’re looking for an engineer to develop and maintain system-level hardware defect detection tests for an AI accelerator server platform. The role is focused on implementing, executing, and improving tests used in factory assembly and service/repair environments to identify hardware defects quickly and reliably. Work closely with the System Test Engineering Lead to translate defect detection strategy into robust, repeatable test implementations rather than design validation.

Key Responsibilities 

• Develop and maintain system-level hardware defect detection tests for individual servers and rack-based systems.
• Implement tests to detect assembly defects, marginal components, damaged hardware, cabling or interconnect issues, cooling faults, etc.
• Develop service and field diagnostic tests used for RMA triage, repair validation, and preventative maintenance.
• Implement deterministic, fast-running tests with clear pass/fail criteria and actionable failure output suitable for manufacturing and service technicians.
• Develop PCIe defect detection tests to identify lane faults, link degradation, polarity issues, retimer problems, and intermittent connectivity failures.
• Implement stress and soak tests designed to expose latent or marginal hardware issues.
• Debug test failures and hardware issues, performing root-cause analysis and escalating design or process issues as appropriate.
• Analyze factory and field failure data to identify coverage gaps and propose test improvements.
• Support deployment, versioning, and maintenance of test software across factory and service environments.
• Collaborate with software development teams to integrate tests into production system software.
• Collaborate with hardware, manufacturing, service, and reliability teams to ensure tests align with known defect modes and operational needs.

Required Qualifications 

• 3–7 years of experience in system, server, or hardware test engineering, preferably in manufacturing or service environments.
• Solid understanding of server hardware architectures, PCIe fabrics, power delivery, cooling systems, and common failure modes.
• Hands-on experience developing or executing hardware defect detection or diagnostic tests.
• Experience working in Linux-based test environments.
• Familiarity with BMC-based systems and basic use of OpenBMC or Redfish interfaces.
• Strong debug skills and the ability to distinguish test issues from real hardware faults.
• Ability to write clear test code, logs, and documentation for operational use.

Preferred Qualifications 

• Experience with AI accelerator, GPU, or high-performance compute servers.
• Exposure to PCIe Gen4/5/6 systems or other high-speed serial interconnects.
• Experience diagnosing intermittent, marginal, or temperature-dependent hardware failures.
• Experience working with liquid-cooled or thermally complex server platforms.

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 is

About us

• Founded in 2022, team of 70+ 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.

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.

You will own the strategy, specification, and development of test solutions for a high-volume production board/PCBA that integrates multiple AI accelerator chips, high-current power delivery, embedded control, and PCIe Gen6 interconnect. Lead and manage internal and external engineering teams to deliver robust, scalable test infrastructure for offshore manufacturing.

Key Responsibilities

• Define the end-to-end board/PCBA test strategy for a complex board containing multiple AI accelerator chips, high-current VRMs, local MCU, and PCIe Gen6 board-to-board and chip-to-chip links.
• Develop detailed test requirements, coverage goals, and manufacturing test specifications (ICT, boundary scan, functional test, system-level test).
• Lead the design and deployment of the board/PCBA test solution for offshore high-volume manufacturing, including fixtures, test stations, instrumentation, and automation architecture.
• Collaborate with hardware, firmware, power, and SI/PI teams to ensure testability is designed-in early (DFT/DFM for board-level manufacturing and test).
• Oversee MCU-based board-level test features (self-test firmware, sensor/telemetry validation, SPI/I2C/GPIO test hooks).
• Coordinate with CM/EMS partners to ensure manufacturability, repeatability, throughput, and yield targets are met; establish KPIs for board test performance.
• Lead root-cause failure analysis and test-based diagnostics for assembly defects, component issues and manufacturing marginalities and weaknesses.
• Own documentation for test specifications, test flow, acceptance criteria, debug procedures.
• Implement data collection, logging, and analytics for yield, performance trends, and field-return correlation.
• Manage external partners developing fixtures, test software, and custom instrumentation; track schedules and deliverables.
• Partner with product engineering to align board test with system characterization, environmental stress testing, and reliability validation.

Required Qualifications 

• 8+ years in board/PCBA test engineering, with ownership of high-volume production test solutions.
• Experience defining test strategies for complex digital boards with high-speed IO and significant power delivery requirements.
• Strong hands-on experience with functional testers, fixture development, boundary scan/JTAG, ICT, and automated manufacturing test flows.
• Experience with embedded test firmware and MCU-driven diagnostics (Zephyr or similar RTOSes a plus).
• Proven ability to work with offshore EMS/CM partners and manage external test development vendors.
• Strong analytical and debug skills across digital logic, power electronics, and high-speed serial links.

Preferred Qualifications

• Experience with boards designed around AI accelerators, GPUs, networking ASICs, or other high-power/high-speed compute hardware.
• Familiarity with high-current VRMs, multiphase converters, and related test methodologies.
• Knowledge of automated factory data systems, test data analytics, and yield-improvement processes.
• Experience with advanced board-to-board and chip-to-chip signal integrity test in a production test environment.

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 is

About us

• Founded in 2022, team of 70+ 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.

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.

We are looking for a team leader for Semiconductor IC test engineering activities for an advanced AI accelerator chip program, including ownership of subcontracted test development, internal team leadership, and delivery of high-quality, high-volume-capable test solutions. The role spans test strategy, test architecture, vendor oversight, team management, and hands-on technical guidance across digital, memory, and high-speed interface domains.

Key Responsibilities 

• Drive the manufacturing test strategy for an AI accelerator chip featuring PCIe Gen6, LPDDR, advanced CMOS nodes, and advanced packaging (e.g., 2.5D/3D, chiplet).
• Lead and manage a team of chip test engineers responsible for test planning, test program development, pattern bring-up, silicon characterization, debug, and optimization.
• Manage subcontracted test development partners (OSATs, ATE vendors, external engineering services). Includes scoping, technical oversight, schedule tracking, and quality control of deliverables.
• Define and drive test software architecture, DFT usage, and test pattern development strategies for high-speed logic, SRAM, DRAM, and High Speed IO blocks.
• Work closely with design, DFT, product engineering, packaging, and validation teams to ensure robust test coverage, manufacturability, and yield ramp success.
• Oversee test development for high speed interfaces such as PCIe Gen6 and multi-GHz LPDDR.
• Guide development of structural and functional test content (scan, MBIST, JTAG, HSIO tests, system-level tests).
• Lead silicon bring-up and development on ATE: correlation, failure analysis, shmooing, corner testing, stress testing, and yield improvement activities.
• Define KPIs and metrics for subcontractor performance, test coverage, yield, time-to-test, and cost optimization.
• Drive continuous improvement in test methodologies, automation, data analytics, and debug infrastructure.
• Ensure robust test flows for advanced packaging (thermals, interposer/bridge connections, TSV integrity, die-to-die IO testing).
• Support qualification, reliability testing, and high-volume manufacturing transfer.

Required Qualifications

• 8+ years in semiconductor test engineering, including leadership or technical lead roles.
• Deep experience with ATE test development (e.g., Advantest 93K, Teradyne).
• Strong understanding of DFT (scan, ATPG, LBIST, MBIST), memory testing, and high-speed interface testing.
• Experience managing external test development partners or OSATs.
• Proven ability to lead and mentor test engineering teams.
• Solid background in advanced CMOS nodes and familiarity with advanced packaging test challenges.
• Expertise in silicon debug, characterization, and correlation across ATE and system-level environments.
• Ability to collaborate across design, architecture, product engineering, packaging, and operations..

Preferred Qualifications

• Experience with AI/ML accelerator chips or other high-performance compute ICs.
• Prior involvement with PCIe Gen5/Gen6 or LPDDR4/5/6 test methodologies.
• Familiarity with signal-integrity-aware test development and high-speed IO margining.
• Experience with chiplets, 2.5D/3D IC test flows, or heterogeneous integration.

   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 is

About us

• Founded in 2022, team of 70+, 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.

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.

You will own the architecture and execution of system-level test strategies for an AI accelerator server platform, covering the manufacture of individual servers and multi-node racks, and field deployment environments. Lead the creation, automation, and integration of tests spanning hardware, firmware, OS, high-speed IO, cooling, and manageability subsystems. Ensure scalable, reliable test processes that support high-volume manufacturing, rack integration, and in-field diagnostics and repair.

Key Responsibilities

• Define the system-level test strategy for an AI accelerator server platform with hundreds of PCIe Gen6 links, liquid cooling, and heterogeneous compute/management subsystems.
• Lead the design and implementation of structural, functional, stress and reliability tests executed on servers and full-rack configurations.
• Manage the deployment of system test suites in manufacturing environments, ensuring high throughput, repeatability, failure isolation, and secure automation workflows.
• Define and deliver test solutions for field diagnostics, repair, and maintenance—including remote test suites, health-check routines, failure triage, and component-level isolation.
• Collaborate with hardware, firmware, OS, and platform teams to embed system-level test and diagnostic functions and ensure testability across the server and rack.
• Drive test integration into OpenBMC, Redfish, and platform-management frameworks; validate BMC/RMC test and maintenance behaviors, telemetry, and hardware-control functions.
• Develop test automation infrastructure and tooling that spans multiple OS environments (embedded Linux on BMC/RMCs, server-class Linux on host CPUs).
• Partner with rack integration teams to define tests executed at rack-level assembly.
• Establish KPIs and dashboards for system test coverage, yield, throughput, failure rates, and field return correlation.
• Manage internal test engineering team and relevant external partners.
• Own system test documentation: test specifications, factory/field procedures, debug guides, and integration handbooks.

Required Qualifications 

• 8+ years of experience in system-level or server platform validation, test engineering, or platform QA.
• Strong understanding of server architectures, BMC/OpenBMC/Redfish, Linux-based systems, and hardware/firmware interactions.
• Experience validating or testing high-speed IO subsystems (PCIe Gen4/5/6 or comparable serial fabrics).
• Experience leading test development for manufacturing or field diagnostics in large-scale server, storage, or networking systems.
• Ability to lead teams, manage external vendors, and drive cross-functional test initiatives.
• Strong skills in system debug, log analysis, failure isolation, and multi-component testing.
• Familiarity with liquid-cooled or thermally complex server designs.

Preferred Qualifications

• Experience with accelerator-based compute (AI/ML, GPUs, custom ASICs).
• Experience with rack-level architectures, DC power distribution, or cooling infrastructure.
• Knowledge of reliability testing, environmental stress testing, and fleet-level monitoring.

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 is

About us

• Founded in 2022, team of 70+ 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.

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.

We’re looking for an engineer to develop and deliver production-ready manufacturing test solutions for an advanced AI accelerator chip. This role is a hands-on individual contributor position focused on ATE test program development, silicon bring-up, debug, and optimization across digital logic, memory, and high-speed interfaces. Work under the direction of the Semiconductor Test Engineering Lead and collaborate closely with design, DFT, product engineering, and external test partners.

Key Responsibilities

• Develop and maintain ATE test programs for an AI accelerator chip targeting high-volume manufacturing.
• Implement manufacturing test content for advanced CMOS designs including high-speed logic, SRAM, DRAM, and high speed IO blocks.
• Develop and debug structural and functional test content such as scan/ATPG, LBIST, MBIST, JTAG, and HSIO tests.
• Bring up first silicon on ATE, including pattern debug, tester correlation, shmooing, and corner analysis.
• Support testing of high-speed interfaces such as PCIe Gen6 and multi-GHz LPDDR, including at-speed tests and margining features.
• Execute silicon characterization and failure analysis to identify yield limiters and defect mechanisms.
• Optimize test coverage, test time, and cost while maintaining manufacturing robustness.
• Work with DFT and design teams to improve testability and close coverage gaps.
• Collaborate with OSATs and external partners on test program execution and debug under guidance from the test lead.
• Support advanced packaging test flows, including die-to-die interconnect testing and package-level thermal considerations.
• Contribute to documentation of test programs, debug procedures, and manufacturing release materials.
• Support qualification, reliability testing, and high-volume manufacturing ramp.

Required Qualifications

• 5+ years of hands-on semiconductor test engineering experience.
• Strong experience developing ATE test programs (Advantest 93K, Teradyne, or equivalent).
• Solid understanding of DFT methodologies (scan, ATPG, MBIST, LBIST) and memory test techniques.
• Experience debugging silicon issues at the tester and correlating failures to design or process causes.
• Familiarity with advanced CMOS nodes and production test challenges.
• Ability to work effectively in a cross-functional engineering environment.

Preferred Qualifications

• Experience testing AI accelerators, GPUs, networking ASICs, or other high-performance compute ICs.
• Experience with PCIe Gen5/Gen6, LPDDR4/5/6, or other high-speed interfaces.
• Exposure to advanced packaging, chiplets, or multi-die test flows.
• Experience improving yield, reducing test time, or optimizing cost in high-volume manufacturing.

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 is

About us

• Founded in 2022, team of 70+ 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.

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.

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.

Key Responsibilities 

• Develop and maintain board/PCBA manufacturing test content for complex, high-power, high-speed boards.
• Implement and debug test coverage across ICT, boundary scan/JTAG, and functional test stages.
• Design and support board-level functional test solutions, including fixtures, probes, cabling, and instrumentation.
• Develop and maintain MCU-based board test firmware for manufacturing diagnostics, self-test, and telemetry validation.
• Implement tests for detecting assembly defects, component failures, solder issues, and manufacturing marginalities.
• Develop PCIe-focused board-level tests to verify chip-to-chip connectivity and integrity.
• Support bring-up and debug of board test stations at offshore EMS/CM sites.
• Analyze test failures and yield data to identify root causes and recommend corrective actions.
• Work closely with hardware, firmware, and SI/PI teams to close board-level testability gaps.
• Contribute to test documentation including test specifications, debug procedures, and manufacturing release notes.
• Support fixture qualification, tester correlation, and ongoing test maintenance.

Required Qualifications

• 4–7 years of experience in board or PCBA test engineering in a high-volume manufacturing environment.
• Hands-on experience with functional test development, ICT, and boundary scan/JTAG.
• Experience designing or supporting test fixtures and automated test stations.
• Working knowledge of high-speed digital interfaces and board-level failure modes.
• Experience developing or supporting embedded test firmware on MCUs.
• Strong debug skills spanning digital logic, power delivery, and interconnect issues.
• Ability to work effectively with offshore manufacturing partners.

Preferred Qualifications

• Experience testing boards with AI accelerators, GPUs, networking ASICs, or similar high-power devices.
• Familiarity with high-current VRMs, multiphase power converters, and power integrity testing.
• Exposure to PCIe Gen5/Gen6 or other high-speed serial links in a production test environment.
• Experience using factory data systems and yield analysis to improve test coverage and throughput.
• Experience supporting board test during NPI, ramp, and sustained production.

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 is

About us

• Founded in 2022, team of 70+ 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.