System Architect

ABOUT SYGALDRY Sygaldry Technologies is building quantum-accelerated AI servers to exponentially speed up training and inference for AI. By integrating quantum and AI, we're accelerating the path to superintelligence, and addressing the problem of rising compute costs and energy bottlenecks. Sygaldry AI servers combine multiple qubit types within a single, fault-tolerant architecture to deliver the combination of cost, scale, and speed necessary for advanced AI applications. We pioneer new domains in physics, engineering, and AI, tackling the hardest challenges with a grounded, optimistic, and rigorous culture. We're looking for individuals ready to define the intersection of quantum and AI and drive its profound global impact. ABOUT THE ROLE: As a Senior Systems Architect, you are responsible for the overall architecture of the server that will connect to GPU/XPU scale-up networks and will enable the quantum computing sub-systems to exponentially speed up production training and inference workloads. You will design, analyze, and model how heterogeneous compute elements interconnect, synchronize, and scale—focusing on GPU scale-up fabrics, collective communication, and system-level performance bottlenecks. This is a hands-on architecture role for someone who enjoys moving between whiteboard-level system design, performance modeling, and lightweight simulation/emulation, with direct influence on hardware, firmware, and software co-design decisions. WHAT YOU’LL WORK ON: System Architecture - Architect end-to-end heterogeneous compute systems spanning CPUs, GPUs, accelerators, and quantum-adjacent subsystems. - Analyze scale-up interconnects (e.g., NVLink, UALink, Infinity Fabric, or equivalent) and their impact on latency, bandwidth, and synchronization. - Design timing arcs, critical paths, and throughput models across complex multi-device systems. - Identify system-level bottlenecks in training, inference, and reinforcement learning workflows at hyperscaler scale. - Model and reason about GPU collective operations (e.g., NCCL, RCCL, or equivalents) across nodes, racks, and pods. - Evaluate how collective communication patterns interact with emerging accelerators and non-GPU compute elements. - Work with algorithm, kernel, compiler, and firmware teams to ensure the system architecture will support their needs. Cross-Functional Collaboration - Lead the architectural thinking between hardware, systems, and software teams, translating requirements and constraints across domains. - Collaborate with quantum hardware engineers to define clean interfaces and timing contracts—this role does not require quantum domain expertise. - Engage with external partners and ecosystems (e.g., interconnect standards bodies, silicon vendors, hyperscaler partners) including co-simulation with selected strategic partners. YOU MAY BE A GOOD FIT IF YOU - Have least five years of experience architecting similarly complex high performance systems deployed in production datacenters - Are familiar with GPU scale-up domains generally, such as NVLink, UALink or other scale-up architectures - Are familiar with architectural and system simulation tools like Gem5, ASTRA-sim, SystemC and VCS. - Are familiar with the AI training and inference workflows in large (i.e. hyperscaler) data centers and the main bottlenecks in training, training and reinforcement learning WHY THIS MATTERS Your work accelerates the path to quantum superintelligence. Each quantum component integrated, each AI model enhanced, each instruction set optimized brings us closer to a future where intelligence and quantum mechanics are inextricably intertwined. We're not building incremental improvements - we're creating exponential transformations that will make AI more affordable, sustainable, personalized, and fundamentally more capable. HOW WE’RE DIFFERENT At Sygaldry, curiosity and intellectual courage drive our work. We approach ambitious challenges with a grounded, optimistic, and rigorous culture and know that kind people build the strongest teams. We prioritize mission over ego and collaborate openly with a strong sense of shared purpose. We dream big, yet we execute with a love of detail. We’re looking for scientists, engineers, and operators to forge new paths with us at the intersection of quantum and AI. CULTURE & BENEFITS - Visa Sponsorship - We know what it takes to make top talent thrive here. We’re open to supporting visas whenever possible. - Compensation - We value your contribution and invest in your future with a competitive salary and meaningful equity. - Benefits - Your well-being matters. We provide company-sponsored health coverage to give you and your family peace of mind. - Connection - Whether it’s company offsite or casual crew socials, we make time to connect, recharge, and have fun together. - Time Off - We trust you to take the time you need. Unlimited PTO so you can rest, recharge, and come back ready to make an impact. We encourage applications from candidates with diverse backgrounds. We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic. We encourage you to apply even if you do not believe you meet every single qualification. If you don’t think this role is right for you, but you believe that you would have something meaningful to contribute to our mission, please reach out at letsbuild@sygaldry.com