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.

About Fractile

Fractile is building next-generation AI compute infrastructure designed to dramatically improve performance-per-watt and unlock new efficiency frontiers for large-scale inference. Our hardware pushes the boundaries of high-speed design, power density, and system integration.

We are looking for a PCBA Product Engineer to help industrialise our advanced AI accelerator boards and scale production with world-class manufacturing partners in Taiwan.

This is a critical, high-ownership role at the core of our hardware execution strategy.

The Role

You will take complex, high-performance PCBAs from prototype through mass production — working at the intersection of hardware design, manufacturing engineering, and supplier execution.

This role requires deep experience with:

• High-layer-count, high-speed boards
• Advanced PCB stackups
• Fine-pitch BGA assembly
• High-current power delivery
• Taiwan-based PCB fabs and SMT partners

You will not only execute builds — you will shape how Fractile scales hardware manufacturing.

What You’ll Do

1. Drive AI Board Industrialisation

• Own PCBA readiness from EVT → DVT → PVT → MP.
• Lead DFM / DFA / DFT reviews for high-speed AI accelerator boards.
• Partner with design engineering to proactively eliminate manufacturability risk.
• Support board bring-up and rapid iteration cycles.

1. Work Closely with Taiwan Manufacturing Partners

• Validate SMT process windows for fine-pitch, high-thermal-mass components.
• Be physically present during builds to drive real-time issue resolution.
• Ensure strong process control and ramp readiness.

1. Own Yield and Quality Metrics

• Drive first-pass yield (FPY) and DPPM improvements.
• Lead structured root cause analysis (8D, RCCA).
• Support reliability validation (thermal cycling, power cycling, environmental stress).

1. Build Scalable Manufacturing Systems

• Establish documentation, control plans, and ECO processes appropriate for a scaling startup.
• Improve traceability and production data visibility.
• Partner with supply chain on cost-down and second-source strategy.

What We’re Looking For

Required Experience

• 5+ years in PCBA Product Engineering, NPI, or Manufacturing Engineering.
• Experience industrialising complex, high-density PCBAs.
• Strong knowledge of:
• 12+ layer stackups
• Controlled impedance
• HDI (blind/buried vias)
• Fine-pitch BGA assembly
• High-power board considerations
• Hands-on factory experience with Taiwan PCB fabs and SMT partners.
• Fluent Mandarin and English.

Strongly Preferred

• Experience with AI accelerators, GPUs, server boards, or high-performance compute.
• Exposure to high-speed interfaces (PCIe, DDR, high-current rails).
• Experience scaling from prototype to volume production.
• Startup or fast-growth hardware environment experience.

Who You Are

• You take full ownership of outcomes, not just tasks.
• You are comfortable on the factory floor solving problems in real time.
• You think systematically but move quickly.
• You identify risks before they become production issues.
• You thrive in high-performance, technically rigorous environments.

What Success Looks Like at Fractile

• Smooth NPI transitions with minimal yield loss.
• Strong first-pass yield at ramp.
• Reduced DFM escapes before production freeze.
• Tight collaboration between design and manufacturing.
• Manufacturing processes that scale as Fractile scales.

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.

About Graphcore 

At Graphcore, we’re building the future of AI compute.We’re a team of semiconductor, software and AI experts, with deep experience in creating the complete AI compute stack - from silicon and software to infrastructure at datacenter scale.As part of the SoftBank Group, backed by significant long-term investment, we are delivering key technology into the fast-growing SoftBank AI ecosystem.To meet the vast and exciting AI opportunity, Graphcore is expanding its teams around the world.We are bringing together the brightest minds to solve the toughest problems, in a place where everyone has the opportunity to make an impact on the company, our products and the future of artificial intelligence.

Job Summary

We are seeking a Product Safety Engineer to support safety design, validation, and certification of high-performance server platforms, including systems operating with high-voltage DC power and advanced liquid-cooling architectures.

This role involves close collaboration with electrical, mechanical, thermal, and manufacturing teams to ensure products meet applicable safety standards and are prepared for global certification.

Required skills: 

• Contribute to safety architecture and compliance for server systems, including HVDC power shelves, PDUs, and liquid-cooling subsystems
• Apply IEC 62368-1 requirements in design reviews, including creepage and clearance, insulation coordination, grounding, and protective measures
• Review schematics, PCB layouts, and mechanical designs to identify potential electrical, thermal, and fire hazards
• Support hazard-based safety engineering (HBSE) assessments, including evaluation of single-fault conditions and abnormal operation scenarios
• Plan and execute safety validation testing, such as dielectric strength (HiPot), insulation resistance, fault condition testing, thermal evaluation, and fire enclosure assessment
• Work with EMC teams to ensure appropriate grounding, shielding, and filtering strategies are considered in safety design
• Support certification activities with external agencies (e.g. CB Scheme, NRTL bodies), including preparation of technical documentation and test reports
• Contribute to safety strategies for HVDC systems (typically 400–1000V DC), including insulation systems, interlocks, and service safety considerations
• Evaluate safety aspects of liquid-cooling systems, including leakage risk, dielectric properties of fluids, condensation, and system monitoring
• Maintain structured, audit-ready documentation to support compliance and manufacturing readiness

Desired:

• Degree in Electrical, Electronic, Mechanical Engineering, or a related discipline
• Experience in product safety, compliance, or a related engineering function
• Working knowledge of IEC 62368-1 or comparable product safety standards
• Understanding of electrical safety principles, including insulation, grounding, creepage/clearance, and fault protection
• Ability to review and interpret engineering designs (schematics, layouts, mechanical drawings) in the context of safety
• Experience supporting product certification or working with external test laboratories
• Familiarity with safety considerations in liquid-cooled or thermally intensive systems
• Awareness of EMC considerations in high-power designs

Benefits

In addition to a competitive salary, Graphcore offers flexible working, a generous annual leave policy, private medical insurance and health cash plan, a dental plan, pension (matched up to 5%), life assurance and income protection. We have a generous parental leave policy and an employee assistance programme (which includes health, mental wellbeing, and bereavement support). We offer a range of healthy food and snacks at our central Bristol office and have our own barista bar! We welcome people of different backgrounds and experiences; we’re committed to building an inclusive work environment that makes Graphcore a great home for everyone. We offer an equal opportunity process and understand that there are visible and invisible differences in all of us. We can provide a flexible approach to interview and encourage you to chat to us if you require any reasonable adjustments.

Sponsorship

Applicants for this position must hold the right to work in the UK. Unfortunately at this time, we are unable to provide visa sponsorship or support for visa applications.

Astera Labs (NASDAQ: ALAB) provides rack-scale AI infrastructure through purpose-built connectivity solutions. By collaborating with hyperscalers and ecosystem partners, Astera Labs enables organizations to unlock the full potential of modern AI. Astera Labs’ Intelligent Connectivity Platform integrates CXL®, Ethernet, NVLink, PCIe®, and UALink™ semiconductor-based technologies with the company’s COSMOS software suite to unify diverse components into cohesive, flexible systems that deliver end-to-end scale-up, and scale-out connectivity. The company’s custom connectivity solutions business complements its standards-based portfolio, enabling customers to deploy tailored architectures to meet their unique infrastructure requirements. Discover more at www.asteralabs.com.

Job Description:

We are seeking an experienced leader to drive Supplier / Manufacturing Quality Engineering to anchor our global supplier quality efforts across both Astera Lab’s semiconductor and board-level products. In this role, candidates will drive leading supplier quality across key manufacturing partners including IC fabs, OSAT’s, and PCB/PCBA vendors. A strong foundation in supplier quality engineering, uniquely paired with experience in advanced data analytics (including AI and machine learning) for predictive quality, risk assessments, and product quality analytics will be highly valuable to this role.

Responsibilities:

Supplier Quality Management

· Nurture winning partnerships across all our strategic manufacturing suppliers: semiconductor wafer fabs, advanced packaging & test (OSAT), boards & assemblies (PCB / PCBA / SMT), substrates / interposers, probe cards, and passive components.

· Develop robust supplier selection and onboarding processes in collaboration with Design, Procurement, Business & Engineering Operations teams.

· Define, build, and manage the systems to collect the data (KPI’s) needed to track supplier performance and drive continuous improvement.

· Audit to assess the effectiveness of supplier process controls, manufacturing capabilities, and overall quality management system.

· Coach suppliers by sharing your deep manufacturing experience and knowledge.

· International travel as needed, potentially on short notice. There is no minimum amount but prepare to accommodate up to 20%.

Advanced Data Analytics & AI/ML

· Create data collection methods to enable product and supplier advanced data analytics needed for monolithic, chiplet, and board products. Data sources will include manufacturing inline controls, production test (including data collection from advanced embedded agents), and failure analysis activities.

· Leverage data into quality models & methods to predict product quality issues and supply chain risks.

· Integrate AI/ML tools into quality systems and dashboards (e.g., outlier screening, automated defect detection, trend analysis, real-time alerts).

· Experience with AI/ML tools is a plus but not required; ability to work with technical partners on model development is key.

Cross-functional Collaboration

· Interface with R&D, NPI, product engineering, ops and other engineering teams to provide supplier input into product design and DFX.

· Support early supplier involvement and ensure quality requirements needed for manufacturability & testability are achieved, and learnings are propagated appropriately to other products in production & development.

· Represent supplier quality as needed in line failure reviews, excursion management, material reviews (MRB), and CAPA processes.

· Partner with engineering and manufacturing teams to conduct quarterly engineering reviews, evaluate supplier changes (PCN), and assess supplier risks.

· With engineering engagement, lead quality audits, and corrective action activities using tools such as 8D, 5-why, and FMEA.

Education & Experience

· Bachelor’s or Master’s degree in Engineering or equivalent experience.

· 8+ years of career progression in supplier quality engineering in the semiconductor and/or board-level electronics industry.

· 3+ years direct experience working embedded within a high-volume advanced manufacturing operation in an engineering role.

· Experience with supplier development in Asia with global manufacturing supply chains.

· Six Sigma or ASQ certification a plus

Technical Skills

· Strong knowledge of IC fabrication, packaging (including chiplet), board assembly (SMT), and test processes.

· Familiarity with reliability qualification methodologies in the application of IPC, Telcordia, JEDEC requirements.

· Proficiency with quality engineering tools (FMEA, APQP, PPAP, SPC, OE, etc.).

· Experience using analytics tools (e.g., JMP, SQL, Excel) to support quality insights. Exposure to AI/ML frameworks is a plus, but not required.

· Fluent in English and Mandarin

We are seeking skilled professional to reside in ODM/EMS, closely monitor manufacturing operations to ensure products are of highest quality and reliability.

Responsibilities

• Identify manufacturing quality issues including IQC, SMT, DIP, Assembly, OQC, RMA and work closely with supplier in analysis and corrective actions.
• Analyze key quality performance indicators, identify areas of improvement (product design, manufacturing process, equipment and/or the QMS), lead continuous improvement by applying relevant methods.
• Manage RMA issues, perform failure analyses in depth; coordinate with design team and suppliers to implement resolutions.
• Maintain/augment on-going quality mechanisms such as OOBA (Out of Box Audit), AQL, KPI.
• Conduct supplier audits and score board process.
• Establish/drive quality initiatives to achieve continuous reduction in defect rate and RMA cost.

Requirements:

• BS/MS in Engineering
• 8 years of related experience in industry grade product system manufacturing process such as PCB, PCBA, SMT, DIP, Design for Manufacturing.
• 5 years of failure analysis experience with sound knowledge of failure investigation process
• Knowledge of quality process such as DVT (Design Verification Testing), ORT (On-Going Reliability Testing), demonstrated MTBF.
• Working knowledge of x86, embedded CPU architecture, or networking systems
• ECR/ECN process, BOM structure in Agile or equivalent document control system.
• Quality Engineering: IQC, OQC, Lean Six Sigma, Kaizen, statistical methods
• Certificate or working knowledge of Quality Systems

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