Senior System Validation Engineer

About us Graphcore is one of the world’s leading innovators in Artificial Intelligence compute. It is developing hardware, software and systems infrastructure that will unlock the next generation of AI breakthroughs and power the widespread adoption of AI solutions across every industry. As part of the SoftBank Group, Graphcore is a member of an elite family of companies responsible for some of the world’s most transformative technologies. Graphcore’s teams are drawn from diverse backgrounds and bring a broad range of skills and perspectives. Job Summary We are seeking a Senior System Validation Engineer to design and implement validation tests for Arm-based data center SoCs using a combination of open-source benchmarking tools and custom micro-benchmarks. Define test cases, tune workload parameters, and use Python to automate and analyze validation across processing units, system memory, communication links, and PCI Express components.   The Team The Systems Validation team validates Graphcore’s AI compute platforms across hardware, firmware, and software domains. Responsibilities and Duties Translate hardware features into structured, parameterized test cases, including: Objectives, workload models, parameters, metrics, and pass/fail criteria.  Use and tune open-source tools such as: Stress-ng, fio, iperf, sysbench, Imbench Define workload parameters: Concurrency (threads/cores), memory footprint, access patterns Queue depth, block size, CPU/NUMA affinity.  Design and execute validation scenarios: Functional, performance, stress, and corner-case testing. Validate across domains: CPU scaling and cache behavior Memory (DDR/HBM) bandwidth, latency, and NUMA effects Interconnect contention under multi-core load PCIe/I-O throughput, latency, and multi-device scenarios Develop custom micro-benchmarks (C/C++) when existing tools are insufficient Use Python to: Automate test execution and orchestration Implement parameter sweeps and test matrices  Parse, analyze, and visualize results.  Debug system behavior and performance issues in collaboration with hardware and firmware teams Candidate Profile Essential: Strong background in Linux systems and low-level performance analysis Experience in system validation, benchmarking, or performance testing Solid understanding of one or more domains: CPU architecture, memory systems, or PCIe Experience using benchmarking tools (stress-ng, fio, iperf, etc.) Ability to define test cases, parameters, and workload models Proficiency in Python (essential) for automation, orchestration, and data analysis Programming experience in C/C++ for micro-benchmark development Desirable: Experience with Arm-based platforms Strong programming skills in C/C++ and Python for system-level development and automation Familiarity with performance tools (perf, numactl, taskset) Experience with large-scale or high core-count systems USA Benefits In addition to a competitive salary, Graphcore offers flexible working and a comprehensive benefits package designed to support your health, wellbeing and financial future. Our benefits include medical, dental and vision coverage, Flexible Spending Accounts (FSAs), Health Savings Accounts (HSAs), disability and life insurance, a 401(k) retirement plan, commuter benefits, wellness services and an Employee Assistance Programme (EAP). 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.