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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Systems Software Architect - **Company:** CRUSOE ENERGY - **Location:** San Francisco, CA, United States (Remote available) - **Salary:** $260,000.0 - $340,000.0 - **Contract:** Permanent contract - **Skills:** Computer-Aided Design, Artificial Intelligence, Amazon Web Services, Microsoft Azure, Cloud Computing, Computer Clusters, Computer Engineering, Software Debugging, Distributed File Systems, Distributed Systems, Network Interface Controllers, Infrastructure as a Service (IaaS), InfiniBand, Kernel-Based Virtual Machine, Linux Kernel, Network Virtualization, Open Source Technology, Software Architecture, Quick EMUlator (QEMU), Remote Direct Memory Access, Software Engineering, Systems Architecture, AI Infrastructure, Graphics Processing Unit (GPU), Google Cloud, Computer Network Operations, Large Language Models, Kubernetes, Information Technology, Bare Metal, Slurm, Oracle Cloud Infrastructure - **Published:** October 27, 2026 - **Apply:** https://www.careerbuilder.com/job-details/principal-systems-software-architect-san-francisco-ca--7b200e07-1266-4c4f-bede-81730b7db2d6 ## About the Role Software Architecture, System Architecture, Artificial Intelligence (AI), Manufacturing, Cloud Computing, Network Operations Center, Problem Solving Skills, Construction, Customer Support/Service, Software Architecture, * Hyperscale Provenance: 12+ years of experience designing and shipping core infrastructure at a major hyperscaler (e.g., OCI, AWS, Azure, GCP) or a specialized HPC cloud. * Deep Systems Authority: Authoritative knowledge of the Linux kernel, virtualization internals (KVM, QEMU, Firecracker), and high-performance networking (RoCE v2, InfiniBand). * Hardware-Software Co-Design: Proven ability to design software that maximizes the performance of NVIDIA/AMD GPUs and high-speed NICs. * R&D Leadership: Experience leading cross-functional teams through high-ambiguity projects and delivering production-ready, mission-critical systems. * Industry Contributions: A portfolio of significant contributions to the field, which may include patents, major open-source contributions, or published research in distributed systems. * Communication Mastery: The rare ability to explain the nuances of memory-mapped I/O to an engineer and the business value of a new fabric architecture to the Board. * Mandatory Education: A Bachelor's or Master's degree in Computer Science, Computer Engineering, or a related analytical field (or equivalent professional experience). ## Description As the Principal Systems Software Architect, you will serve as the visionary lead for Crusoe's next-generation AI infrastructure. This is a role for an industry-recognized expert who has already "seen the movie" at hyperscale and is ready to redefine the I/O path for the age of generative AI. You aren't just building a cloud; you are designing the fluid fabric that unifies Bare-Metal-as-a-Service (BMaaS), Intelligent IaaS, and Elastic CaaS into a single, high-performance pool of intelligence. In this position, you will bridge the gap between silicon and software, advising executive leadership on critical hardware/software co-design pivots while remaining hands-on enough to lead elite R&D teams in shipping production-grade kernel and orchestration code. We are looking for a master of the I/O path who can push massive-scale training workloads to the theoretical limits of hardware. This is a full-time position. What You'll Be Working On: * Unifying Infrastructure Pillars: * Bare-Metal-as-a-Service (BMaaS): Architect systems that deliver raw GPU throughput via zero-latency InfiniBand/RDMA fabrics for massive-scale training. * Intelligent IaaS: Design highly optimized, thin virtualization layers using KVM or custom micro-VMs to provide enterprise-grade isolation without the "virtualization tax." * Elastic CaaS: Build a high-performance container substrate (utilizing Kubernetes or Slurm) that allows AI workloads to burst and scale across heterogeneous GPU nodes. * Mastering the I/O Path: Lead the architectural design of our internal cloud fabric, drawing on experience from top-tier hyperscalers to drive the technical roadmap for SR-IOV, RDMA, and virtualized GPU scheduling. * Advanced R&D Leadership: Lead elite workstreams to prototype and productionize novel methods for managing memory, networking, and compute that don't yet exist in standard cloud distributions. * Technical Strategy & Documentation: Draft white papers and RFCs that define the next two years of Crusoe's compute and networking stack. * High-Level Debugging: Work alongside Staff and Senior engineers to resolve complex race conditions in the I/O path and optimize kernel-level memory pinning for GPU clusters. * Industry Influence: Represent Crusoe in open-source communities and industry forums to influence the global direction of cloud-native AI infrastructure., * Patent Holder: Possession of patents related to network virtualization, GPU scheduling, or distributed file systems. * Open Source Leadership: Maintainer status or significant contributions to the Linux Kernel, Kubernetes, or specialized HPC projects. * AI/ML Workload Expertise: Direct experience optimizing infrastructure for Large Language Model (LLM) training and inference at scale. * Peer-reviewed publications at top systems venues (OSDI, SOSP, NSDI, SC), patents, IETF RFCs * Significant open-source contributions, or industry white papers on distributed systems, high-performance networking, or AI infrastructure