Senior Software Engineer, CAPE
Crusoe · San Francisco, CA · Software engineering · posted 3 days ago
Crusoe · Sunnyvale, CA · posted 6 days ago
By AtiveSite · Published 07/11/2026 · Updated 09/11/2026 · Every figure is linked to its source below.
| Employer | Crusoe |
|---|---|
| Location | Sunnyvale, California |
| Field | Technology › Cloud, IT and infrastructure |
| Level | not stated |
| Source category | Cloud Engineering, Cloud Compute |
| Posted | 2026-11-03 (6 days ago) |
| Work arrangement | On-site at the location listed |
| Pay | Not published in the source listing |
Crusoe is on a mission to accelerate the abundance of energy and intelligence. As the only vertically integrated AI infrastructure company built from the ground up, we own and operate each layer of the stack — from electrons to tokens — to power the world's most ambitious AI workloads. When you join Crusoe, you join a team that is building the future, faster.
We're in the midst of the greatest industrial revolution of our time. The demand for AI compute is boundless, and power is a bottleneck. We're solving that — with an energy-first approach that makes AI infrastructure better for the world and faster for the people innovating with AI.
We're looking for problem-solving, opportunity-finding teammates with a sense of urgency, who believe in the scale of our ambition and thrive on a path not fully paved — people who want to grow their careers alongside a team of experts across energy, manufacturing, data center construction, and cloud services.
If you want to do the most meaningful work of your career, help our customers and partners advance their AI strategies, and be part of a high-performing team that believes in each other, come build with us at Crusoe.
About the Role:
At Crusoe, we are building the "engine room" of the AI revolution. We are seeking a Staff Cloud Hypervisor R&D Engineer to serve as the lead architect for our next-generation virtualization stack. In this role, you will move beyond standard virtualization to design a "Greenfield" hypervisor environment where GPUs, DPUs, and high-speed interconnects are first-class citizens. You will be responsible for eliminating the "virtualization tax," ensuring our cloud infrastructure delivers bare-metal performance for the world’s most demanding AI/ML workloads.
What You'll Be Working On:
Next-Gen Hypervisor Architecture: Lead the R&D and implementation of core hypervisor components (KVM, QEMU, or custom Rust-based solutions) specifically optimized for massive-scale GPU fleets.
AI Hardware Virtualization: Develop and refine advanced hardware pass-through and abstraction techniques (SR-IOV, VFIO, mdev) to ensure NVIDIA GPUs and BlueField DPUs operate with near-zero latency in a multi-tenant environment.
The "Holy Grail" Challenges: Solve high-stakes technical hurdles such as live migration for AI workloads with 80GB+ VRAM and optimizing PCIe peer-to-peer communication between virtualized accelerators.
Performance Research & Profiling: Conduct deep-dive bottleneck analysis across the entire stack—from CPU microarchitecture and MMU virtualization to guest OS scheduling—to minimize jitter and maximize throughput.
Open Source Leadership: Actively contribute to and maintain upstream open-source virtualization projects, positioning Crusoe as a thought leader in the Linux kernel and virtualization communities.
Security & Isolation: Architect robust security boundaries for AI-native cloud infrastructure, balancing high-performance hardware access with strict multi-tenant isolation and hardening.
What You'll Bring to the Team:
7+ Years of Experience: Proven track record in hypervisor internals, kernel development, or low-level systems programming.
Deep Virtualization Expertise: Expert-level knowledge of CPU virtualization (Intel VT-x, AMD-V) and memory virtualization (EPT/NPT, HugePages). You should be comfortable discussing the nuances of VMExit overhead.
Hardware-Software Integration: Experience working with specialized AI hardware, including GPUs, InfiniBand/RoCE NICs, and SmartNICs/DPUs.
Programming & Tooling: Mastery of C and C++ is required; proficiency in Rust for modern systems programming is highly preferred. Experience with QEMU, KVM, and Linux kernel debugging tools (perf, ftrace, eBPF).
I/O Mastery: Deep understanding of VirtIO, vhost-user, and hardware-accelerated I/O paths.
Technical Leadership: Experience leading complex, cross-functional projects that bridge the gap between hardware engineering and cloud control planes
Benefits:
Competitive compensation and equity packages
Restricted Stock Units
Paid time off, paid holidays & leave of absence programs
Comprehensive health, dental & vision insurance
Employer contributions to HSA account
Paid parental leave
Paid life insurance, short-term and long-term disability
Professional development & tuition reimbursement
Mental health & wellness support
Commuter benefits (parking & transit)
Cell phone stipend
401(k) Retirement plan with company match up to 4% of salary
Volunteer time off
Global travel insurance & emergency assistance
Daily meals allowance
Additional perks & programs specific to location
Compensation Range
Compensation will be paid in the range of up to $215,000 -$260,000 + Bonus. Restricted Stock Units are included in all offers. Compensation to be determined by the applicant's knowledge, education, and abilities, as well as internal equity and alignment with market data.
Crusoe is an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, disability, genetic information, pregnancy, citizenship, marital status, sex/gender, sexual preference/ orientation, gender identity, age, veteran status, national origin, or any other status protected by law or regulation.
Field: Technology Sub-niche: Cloud, IT and infrastructure All jobs at Crusoe Jobs in California Jobs in Sunnyvale, CA Sunnyvale city guide California state guide Santa Clara County economy
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This is a — role in the Technology field (Cloud, IT and infrastructure) at Crusoe.
We could not match this job title to one occupation in the official wage statistics, so no pay estimate is shown. Pay is not in the source listing; ask the employer for the range and compare in the 240 job niches.
Estimate for a wage earner: 2026 federal brackets and standard deduction (IRS), Social Security 6.2% up to $184,500, Medicare 1.45% (+0.9% above $200,000 single / $250,000 married), and a state rate you set; set your own state tax rate. It ignores credits, pre-tax deductions, local taxes and benefits. Sources: IRS: tax year 2026 inflation adjustments · SSA wage base per Federal Register notice 2025-19763.
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The job is in Sunnyvale, CA. Below is what the official statistics say about living and working there.
How Sunnyvale compares. Among the 145 largest places in California, Sunnyvale is #37 by population, #12 for long commutes (#1 = fewest), #15 for household income (#1 = highest), #129 for rent (#1 = cheapest). Its county, Santa Clara County, is #1 of 58 counties for average pay ($197,043).
Sunnyvale has 154,236 residents (ACS 2020–2024), about 0.4% of the population of California. It covers 22 square miles of land, which works out to roughly 6,992 people per square mile. The median age is 35.2, 7% younger than the state median (35.2 against 37.9).
The median gross rent is $3,039 a month (rent plus utilities), 49% above the state median ($3,039 against $2,036). Over a year that is 19.6% of the median household income. US housing guidance treats housing as affordable when it takes 30% of income or less, so the typical household is under that line. The median home value is $1,801,800, which is 9.7 times the median household income ($186,170); a ratio above 5 usually means buying is out of reach without savings or a second income. 43.8% of households own their home, 22% below the state average (43.8% against 55.9%). A low ownership share points to a rental-heavy market with more apartments and shorter stays.
The San Jose-Sunnyvale-Santa Clara, CA metropolitan area has 1,134,970 jobs in the BLS wage survey, and the median pay across all occupations is $84,050 a year, 65% above the national median ($84,050 against $50,980). The biggest occupation groups are computer and mathematical (149,970 jobs, median $186,320); management (115,110 jobs, median $210,750); business and financial operations (94,210 jobs, median $125,240). The area is most specialised in computer and mathematical (3.9 times) and architecture and engineering (2.5 times), where the share of workers is well above the national share. The best-paying groups with at least 5,000 jobs are management ($210,750) and legal ($195,190). In 2026M09 the unemployment rate of Santa Clara County was 4.2%. 72.4% of residents aged 16 and over are in the labour force. The city lies in Santa Clara County; its jobs, pay by industry and GDP are on the county page.
Among workers, 53.7% drive alone, 4.0% use public transit, 1.6% walk, 29.2% work from home. 9.0% of workers commute 45 minutes or more, 54% below the state average (9.0% against 19.4%). Remote work is more common than in the state as a whole, which widens the set of employers a resident can work for without moving.
69.3% of adults aged 25 and over hold a bachelor's degree or higher, 87% above the state share (69.3% against 37.1%). 50.2% of residents were born outside the United States, 86% above the state share (50.2% against 27.0%). The poverty rate is 5.8%, 52% below the state rate (5.8% against 12.0%).
The warmest month is Aug, averaging 68°F (19.8°C), and the coolest is Jan at 47°F (8.3°C). About 510 mm (20 inches) of precipitation falls in a year; Dec is the wettest month (114 mm) and Jul the driest (0 mm). These values come from NASA satellite-based climatology on a grid of about 50 km, so they describe the wider area, not a weather station in the city.
Closest cities in this guide: Mountain View (3 miles, similar rent); Santa Clara (4 miles, similar rent); Los Altos (4 miles, rent 15% higher); Cupertino (5 miles, rent 15% higher). Rent differences are against Sunnyvale; use the Compare tab to put any two cities side by side.
Full guide to Sunnyvale →California guideAll jobs in Sunnyvale
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Places within 50 miles (straight line) of Sunnyvale, CA that have a guide, with what living there costs. No pay estimate is shown because the title did not match one occupation.
| Place ⇅ | Distance from the job city ⇅ | Median rent ⇅ | Median home value ⇅ | Median household income ⇅ | Commute 45+ min ⇅ | Rent as % of occupation pay ⇅ | Open jobs there ⇅ |
|---|---|---|---|---|---|---|---|
| Sunnyvale, CA | 0 mi | $3,039 | $1,801,800 | $186,170 | 9.0% | n/a | Jobs |
| Mountain View, CA | 3 mi | $3,062 | $1,927,000 | $189,917 | 9.3% | n/a | Jobs |
| Santa Clara, CA | 4 mi | $3,016 | $1,582,600 | $178,958 | 8.9% | n/a | Jobs |
| Los Altos, CA | 4 mi | $3,501 | $2,000,001 | $250,001 | 8.3% | n/a | — |
| Cupertino, CA | 5 mi | $3,501 | $2,000,001 | $234,707 | 9.1% | n/a | Jobs |
| Los Altos Hills, CA | 6 mi | $3,501 | $2,000,001 | $250,001 | 18.0% | n/a | — |
| Palo Alto, CA | 6 mi | $3,484 | $2,000,001 | $231,101 | 8.2% | n/a | Jobs |
| Saratoga, CA | 8 mi | $3,501 | $2,000,001 | $250,001 | 8.3% | n/a | — |
| Milpitas, CA | 8 mi | $3,120 | $1,251,700 | $178,798 | 15.2% | n/a | Jobs |
| East Palo Alto, CA | 8 mi | $2,244 | $1,102,600 | $113,493 | 9.7% | n/a | — |
| Newark, CA | 8 mi | $2,776 | $1,142,800 | $169,064 | 22.2% | n/a | Jobs |
| Campbell, CA | 8 mi | $2,737 | $1,617,000 | $145,268 | 10.4% | n/a | Jobs |
| Fremont, CA | 9 mi | $2,933 | $1,403,800 | $181,506 | 23.6% | n/a | Jobs |
| Menlo Park, CA | 9 mi | $3,239 | $2,000,001 | $210,025 | 11.5% | n/a | Jobs |
| Atherton, CA | 11 mi | $3,501 | $2,000,001 | $250,001 | 7.0% | n/a | — |
| Los Gatos, CA | 11 mi | $3,247 | $2,000,001 | $217,554 | 17.6% | n/a | — |
| San Jose, CA | 13 mi | $2,669 | $1,233,200 | $146,427 | 15.3% | n/a | Jobs |
| Redwood City, CA | 14 mi | $2,968 | $1,801,700 | $157,814 | 10.2% | n/a | Jobs |
| Union City, CA | 15 mi | $2,713 | $1,104,900 | $133,715 | 24.0% | n/a | — |
| San Carlos, CA | 15 mi | $2,854 | $2,000,001 | $237,470 | 14.9% | n/a | Jobs |
We could not match this title to one occupation, so here are the other sub-niches in Technology, where your skills may carry over:
Cybersecurity (713) Data, analytics and AI (3366) Software engineering (4089) Product management (836)
How far Sunnyvale, CA is from the 20 largest US cities, in straight-line miles (not driving distance). Click a column to sort.
| From ⇅ | Straight-line distance (miles) ⇅ | Population of that city ⇅ |
|---|---|---|
| San Jose, CA | 13 mi | 990,138 |
| San Francisco, CA | 60 mi | 830,235 |
| Los Angeles, CA | 309 mi | 3,857,263 |
| San Diego, CA | 420 mi | 1,389,526 |
| Phoenix, AZ | 618 mi | 1,642,323 |
| Seattle, WA | 707 mi | 754,195 |
| Denver, CO | 939 mi | 718,877 |
| Oklahoma City, OK | 1,365 mi | 697,125 |
| Fort Worth, TX | 1,427 mi | 963,194 |
| San Antonio, TX | 1,457 mi | 1,479,835 |
| Dallas, TX | 1,458 mi | 1,307,930 |
| Austin, TX | 1,471 mi | 979,539 |
| Houston, TX | 1,614 mi | 2,328,253 |
| Chicago, IL | 1,841 mi | 2,711,226 |
| Indianapolis, IN | 1,932 mi | 885,860 |
| Columbus, OH | 2,097 mi | 914,802 |
| Charlotte, NC | 2,281 mi | 903,844 |
| Jacksonville, FL | 2,348 mi | 977,670 |
| Philadelphia, PA | 2,506 mi | 1,579,706 |
| New York, NY | 2,559 mi | 8,483,844 |
| City ⇅ | Straight-line distance ⇅ | Open jobs ⇅ |
|---|---|---|
| Palo Alto, CA | 6 mi | 298 |
| Milpitas, CA | 8 mi | 2 |
| Campbell, CA | 8 mi | 7 |
| Fremont, CA | 9 mi | 6 |
| San Jose, CA | 13 mi | 698 |
| Redwood City, CA | 14 mi | 45 |
| Belmont, CA | 17 mi | 2 |
| Pleasanton, CA | 21 mi | 6 |
| Alameda, CA | 28 mi | 38 |
| Capitola, CA | 29 mi | 1 |
| San Francisco, CA | 60 mi | 2,804 |
| Sacramento, CA | 87 mi | 53 |
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A private-sector role in technology (cloud, it and infrastructure) listed 6 days ago. The full description is on this page and on the employer's page.
Sunnyvale, CA.
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The listing does not publish pay, and we could not match the title to one official occupation.
Median rent in Sunnyvale is $3,039 a month and median household income $186,170 (ACS 2020–2024).
It was posted on 2026-11-03 (6 days ago). Jobs older than 90 days are not shown.
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