{"schemaVersion":"jobsearcher.job.v1","id":"55110e4e6f284642eb8977c8","url":"https://jobsearcher.com/jobs/55110e4e6f284642eb8977c8","canonicalUrl":"https://jobsearcher.com/jobs/55110e4e6f284642eb8977c8","title":"Performance Modelling Engineer","description":"The Role\nWe’re searching for a Staff Performance Modelling Engineer to create and own the analytical and simulation models that steer OTPU architecture and software evolution. You will build functional simulators as well as high-fidelity, cycle-accurate models of our optical compute system. This role is critical to explore “what-if” design spaces, and deliver insights that directly influence our software, hardware, and optical roadmaps. This role sits at the crossroads of hardware architecture, software tooling and machine-learning workload analysis, perfect for an engineer who loves data-driven decision-making and fast iteration.\nResponsibilities\nOwnership: Define and deliver the technical vision and roadmap for your team that unlocks key strategic technical and business goals that are essential to the success of Olix.\nCollaboration: Partner closely with all engineering teams to help shape our overall system architecture and delivery while ensuring models reflect reality and reality meets performance goals.\nChampion Modelling: Educate peers on modelling methodology and champion data-driven design culture.\nFunctional Simulator: Design, build, and maintain a functional simulator of the OPTU subsystem and full pipeline.\nPerformance Simulator: Design and maintain architectural & cycle-accurate models of the OPTU subsystems and pipeline. Identify throughput, latency and utilisation hot-spots; propose architectural, or scheduling fixes.\nWorkload Analysis & Bottleneck Hunting: Instrument benchmarks (LLMs, diffusion, graph workloads) to collect detailed traces.\nDesign-Space Exploration: Run massive parameter sweeps with your functional and to understand tradeoffs and guide the software, hardware, and optical teams.\nTooling & Automation: Develop Python/C++ tooling for trace parsing, statistical analysis and visualisation.Integrate models into CI so that every RTL commit gets a performance smoke test.\nSkills & Experience\n7+ years building performance or power models for CPUs, GPUs, ASICs, or accelerators.\nProven track record providing technical leadership to a team of 5~10 engineers, resulting in significant business impact.\nStrong coding ability in C++ and Python; experience with discrete-event or cycle-accurate simulators (e.g., gem5, SystemC, custom in-house).\nStrong grasp of computer-architecture fundamentals: memory systems, interconnects, queuing theory, Amdahl/Gustafson analysis.\nFamiliarity with machine-learning workloads and common frameworks (PyTorch, TensorFlow, JAX).\nComfort reading RTL or schematics and discussing micro-architectural trade-offs with hardware designers.\nExcellent data-visualisation and communication skills: able to turn millions of simulation samples into one decisive slide.\nBachelor’s in EE, CS, Physics, Applied Maths or related; advanced degree preferred but not required.\nPersonal or open-source projects in simulators, ML kernels, or performance analysis are a significant plus.\nCompensation & Benefits\nStarting salary: £174,000+ depending on experience, skills, and location.\nCompetitive stock options, you’re not just part of the journey, you will own a piece of it.\nWork from our HQ in King’s Cross, right in the middle of London’s buzzing AI scene.\nLive within 45 minutes of the office? Perfect. Live within 20 minutes? We’ll add an extra location bonus to your salary.\nWe offer visa sponsorship and full relocation support (UK and abroad), through a dedicated third-party provider who are on hand to make your move to London as seamless as possible.\nFull BUPA healthcare and dental cover, medical history disregarded.\nHigh-spec tech for everyone - M4 Macs as standard, M4 Pros for Engineers.\nSony noise-cancelling headphones and ergonomic setups to keep you comfortable and focused.\nPersonal company card to spend on tools that help you do your job - like ChatGPT Pro or anything else that boosts your workflow.\nHealthy, chef-cooked dinners in the office every night, with something for every diet and tastebud.\nMonthly off-site team socials.\n25 days of paid holiday, plus all the UK bank holidays.\nAccess to our in-house 3D printer for personal or work projects.\nCycle2work scheme.\nNeed a caffeine fix? We’ve got you covered with a tab at our favourite local coffee shop.\nWe offer a pension plan and salary sacrifice options.\nDue to U.S. export control regulations, candidates’ eligibility to work at Olix depends on their most recent citizenship or permanent residency status. We are generally unable to consider applicants whose most recent citizenship or permanent residence is in certain restricted countries (currently including Iran, North Korea, Syria, Cuba, Russia, Belarus, China, Hong Kong, Macau, and Venezuela). Applicants who have subsequently obtained citizenship or permanent residency in another country not subject to these restrictions may still be eligible.\nWe do not accept unsolicited CVs from recruitment agencies, will not be liable for any fees, and prohibit unauthorised use of our company name in recruitment activities.\nCompensation Range: £167K - £204K","company":"Olix","rawCompany":"olix","city":"Millbrae","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-04-14T10:46:34.509Z","occupations":[{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"17-2199.00","title":"Engineers, All Other","slug":"engineers-all-other"},{"code":"17-2061.00","title":"Computer Hardware Engineers","slug":"computer-hardware-engineers"}],"industries":[{"code":"541715","title":"Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)","slug":"research-and-development-in-the-physical-engineering-and-life-sciences-except-nanotechnology-and-biotechnology"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Performance Modelling Engineer","description":"The Role\nWe’re searching for a Staff Performance Modelling Engineer to create and own the analytical and simulation models that steer OTPU architecture and software evolution. You will build functional simulators as well as high-fidelity, cycle-accurate models of our optical compute system. This role is critical to explore “what-if” design spaces, and deliver insights that directly influence our software, hardware, and optical roadmaps. This role sits at the crossroads of hardware architecture, software tooling and machine-learning workload analysis, perfect for an engineer who loves data-driven decision-making and fast iteration.\nResponsibilities\nOwnership: Define and deliver the technical vision and roadmap for your team that unlocks key strategic technical and business goals that are essential to the success of Olix.\nCollaboration: Partner closely with all engineering teams to help shape our overall system architecture and delivery while ensuring models reflect reality and reality meets performance goals.\nChampion Modelling: Educate peers on modelling methodology and champion data-driven design culture.\nFunctional Simulator: Design, build, and maintain a functional simulator of the OPTU subsystem and full pipeline.\nPerformance Simulator: Design and maintain architectural & cycle-accurate models of the OPTU subsystems and pipeline. Identify throughput, latency and utilisation hot-spots; propose architectural, or scheduling fixes.\nWorkload Analysis & Bottleneck Hunting: Instrument benchmarks (LLMs, diffusion, graph workloads) to collect detailed traces.\nDesign-Space Exploration: Run massive parameter sweeps with your functional and to understand tradeoffs and guide the software, hardware, and optical teams.\nTooling & Automation: Develop Python/C++ tooling for trace parsing, statistical analysis and visualisation.Integrate models into CI so that every RTL commit gets a performance smoke test.\nSkills & Experience\n7+ years building performance or power models for CPUs, GPUs, ASICs, or accelerators.\nProven track record providing technical leadership to a team of 5~10 engineers, resulting in significant business impact.\nStrong coding ability in C++ and Python; experience with discrete-event or cycle-accurate simulators (e.g., gem5, SystemC, custom in-house).\nStrong grasp of computer-architecture fundamentals: memory systems, interconnects, queuing theory, Amdahl/Gustafson analysis.\nFamiliarity with machine-learning workloads and common frameworks (PyTorch, TensorFlow, JAX).\nComfort reading RTL or schematics and discussing micro-architectural trade-offs with hardware designers.\nExcellent data-visualisation and communication skills: able to turn millions of simulation samples into one decisive slide.\nBachelor’s in EE, CS, Physics, Applied Maths or related; advanced degree preferred but not required.\nPersonal or open-source projects in simulators, ML kernels, or performance analysis are a significant plus.\nCompensation & Benefits\nStarting salary: £174,000+ depending on experience, skills, and location.\nCompetitive stock options, you’re not just part of the journey, you will own a piece of it.\nWork from our HQ in King’s Cross, right in the middle of London’s buzzing AI scene.\nLive within 45 minutes of the office? Perfect. Live within 20 minutes? We’ll add an extra location bonus to your salary.\nWe offer visa sponsorship and full relocation support (UK and abroad), through a dedicated third-party provider who are on hand to make your move to London as seamless as possible.\nFull BUPA healthcare and dental cover, medical history disregarded.\nHigh-spec tech for everyone - M4 Macs as standard, M4 Pros for Engineers.\nSony noise-cancelling headphones and ergonomic setups to keep you comfortable and focused.\nPersonal company card to spend on tools that help you do your job - like ChatGPT Pro or anything else that boosts your workflow.\nHealthy, chef-cooked dinners in the office every night, with something for every diet and tastebud.\nMonthly off-site team socials.\n25 days of paid holiday, plus all the UK bank holidays.\nAccess to our in-house 3D printer for personal or work projects.\nCycle2work scheme.\nNeed a caffeine fix? We’ve got you covered with a tab at our favourite local coffee shop.\nWe offer a pension plan and salary sacrifice options.\nDue to U.S. export control regulations, candidates’ eligibility to work at Olix depends on their most recent citizenship or permanent residency status. We are generally unable to consider applicants whose most recent citizenship or permanent residence is in certain restricted countries (currently including Iran, North Korea, Syria, Cuba, Russia, Belarus, China, Hong Kong, Macau, and Venezuela). Applicants who have subsequently obtained citizenship or permanent residency in another country not subject to these restrictions may still be eligible.\nWe do not accept unsolicited CVs from recruitment agencies, will not be liable for any fees, and prohibit unauthorised use of our company name in recruitment activities.\nCompensation Range: £167K - £204K","datePosted":"2026-04-14T10:46:34.509Z","dateModified":"2026-04-14T10:46:34.509Z","hiringOrganization":{"@type":"Organization","name":"Olix","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Millbrae","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"55110e4e6f284642eb8977c8"},"url":"https://jobsearcher.com/jobs/55110e4e6f284642eb8977c8"}}