Senior Software Engineer, Sandboxes & Virtualization in Sunnyvale

CoreWeave is The Essential Cloud for AI™. Built for pioneers by pioneers, CoreWeave delivers a platform of technology, tools, and teams that enables innovators to build and scale AI with confidence. Trusted by leading AI labs, startups, and global enterprises, CoreWeave combines superior infrastructure performance with deep technical expertise to accelerate breakthroughs and turn compute into capability. Founded in 2017, CoreWeave became a publicly traded company (Nasdaq: CRWV) in March 2025. What You’ll Do: The Runtime & GPU Systems team builds and operates secure, high-performance environments for multi-tenant Kubernetes platforms at scale. Our team sits at the intersection of container runtimes, lightweight virtualization, GPU infrastructure, and Linux systems engineering. We partner closely with security, platform, and GPU infrastructure teams to deliver robust, isolated, and efficient execution environments for AI-driven workloads. About the role: As a GPU & Runtime Systems Engineer, you will design, build, and evolve secure sandboxed runtime environments for Kubernetes workloads, focusing on runtime isolation, performance, and security. You will integrate container runtimes, lightweight VMs, and virtualization technologies to support GPU-accelerated workloads in multi-tenant environments. Day-to-day, you'll develop GPU-aware sandboxing and scheduling strategies, optimize containerization and I/O performance for latency-sensitive workloads, and influence architectural decisions across Linux internals, container runtimes, virtualization layers, and GPU drivers. Some of what you’ll work on: Design and implement secure execution environments for containerized and virtualized workloads. Build GPU‑aware scheduling, isolation, and resource management strategies for multi‑tenant workloads. Optimize container, VM, and I/O performance across GPU‑accelerated workloads. Conduct profiling, benchmarking, and performance tuning for runtime, virtualization, and GPU stacks. Contribute to architectural decisions across Linux internals, container runtimes, virtualization layers, and GPU drivers. Collaborate with security, platform, and infrastructure teams to define and implement runtime isolation and performance standards. Who You Are: 3+ years of experience in systems, platform, infrastructure, or production engineering at scale. Strong hands‑on experience with Kubernetes, container orchestration, and cloud architectures, including controllers, operators, or scheduling extensions. Experience designing, implementing, or operating secure execution environments (container runtimes, sandboxed workloads, or virtualized systems). Practical experience with lightweight virtualization and sandboxing technologies (e.g., Kata Containers, gVisor, KubeVirt, QEMU). Experience supporting GPU‑accelerated workloads in multi‑tenant environments, including GPU scheduling, isolation, device passthrough, mediated devices, or virtualization. Proficient in systems‑oriented programming (Go, C/C++, Rust, Bash) with strong Linux internals knowledge. Skilled at diagnosing and resolving complex performance, reliability, or isolation issues across containers, VMs, and infrastructure. Experienced in profiling, benchmarking, and tuning performance across runtime, virtualization, and GPU stacks. Additional Qualifications: Experience building systems for safely executing untrusted or sensitive workloads in shared environments. Familiarity with GPU drivers and low‑level virtualization or I/O optimization techniques. Experience defining threat models and implementing runtime security policies in multi‑tenant systems. Wondering if you’re a good fit? We believe in investing in our people, and value candidates who can bring their own diversified experiences to our teams – even if you’re not a 100% skill or experience match. If some of this describes you, we’d love to talk. You love building high‑performance systems that operate reliably under extreme scale and demand. You’re curious about the intersection of security, virtualization, Kubernetes, and GPU infrastructure. You’re an expert in reasoning about trade‑offs between isolation, performance, and operability. Why CoreWeave? At CoreWeave, we work hard, have fun, and move fast! We’re in an exciting stage of hyper‑growth that you will not want to miss out on. We’re not afraid of a little chaos, and we’re constantly learning. Our team cares deeply about how we build our product and how we work together, which is represented through our core values. Be Curious at Your Core Act Like an Owner Empower Employees Deliver Best‑in‑Class Client Experiences Achieve More Together What We Offer The range we’ve posted represents the typical compensation range for this role. To determine actual compensation, we review the market rate for each candidate which can include a variety of factors. These include qualifications, experience, interview performance, and location. In addition to a competitive salary, we offer a variety of benefits to support your needs, including: Medical, dental, and vision insurance – 100% paid for by CoreWeave Company‑paid Life Insurance Voluntary supplemental life insurance Short and long‑term insurance Flexible Spending Account Health Savings Account Tuition Reimbursement Ability to Participate in Employee Stock Purchase Program (ESPP) Mental Wellness Benefits through Spring Health Family‑Forming support provided by Carrot Paid Parental Leave Flexible, full‑service childcare support with Kinside 401(k) with a generous employer match Flexible PTO Catered lunch each day in our office and data center locations A casual work environment A work culture focused on innovative disruption Our Workplace While we prioritize a hybrid work environment, remote work may be considered for candidates located more than 30 miles from an office, based on role requirements for specialized skill sets. New hires will be invited to attend onboarding at one of our hubs within their first month. Teams also gather quarterly to support collaboration. California Consumer Privacy Act – California applicants only CoreWeave is an equal opportunity employer, committed to fostering an inclusive and supportive workplace. All qualified applicants and candidates will receive consideration for employment without regard to race, color, religion, national origin, gender, sexual orientation, age, veteran status, or genetic information. As part of this commitment and consistent with the Americans with Disabilities Act (ADA), CoreWeave will ensure that qualified applicants and candidates with disabilities are provided reasonable accommodations for the hiring process, unless such accommodation would cause an undue hardship. If reasonable accommodation is needed, please contact View email address on click.appcast.io. Export Control Compliance This position requires access to export controlled information. To conform to U.S. Government export regulations applicable to that information, applicant must either be (A) a U.S. person, defined as a (i) U.S. or (ii) U.S. lawful permanent (green card holder), (iii) refugee under 8 U.S.C. § 1157, or (iv) asylee under 8 U.S.C. § 1158, (B) eligible to access the export controlled information without a required export authorization, or (C) eligible and reasonably likely to obtain the required export authorization from the applicable U.S. government agency. CoreWeave may, for legitimate business reasons, decline to pursue any export licensing process. #J-18808-Ljbffr Energy Jobline ZR