Virtualization / Compute Systems Engineer ($250K – $300K + Equity) at Blaxel

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This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.

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Job Title: Virtualization / Compute Systems Engineer

Salary: $250K – $300K + Equity

Company Description: Blaxel - First Round Capital backed startup building the AWS for AI agents.

Job Description:

Join a high-performance team building an AI-native cloud platform from the ground up. You will own the virtualization layer, extending a Firecracker fork to achieve sub-25ms cold starts for agentic workloads. This is a foundational role for a systems expert to architect secure, multi-tenant isolation and low-latency compute at massive scale.

Location: San Francisco, USA

Why this role is remarkable:

• Work directly with technical founders who previously built and sold a multicloud data platform to Europe's largest cloud provider.
• Join a YC X25 company that recently raised $7.3M from First Round Capital and already processes billions of AI agent requests.
• Impact a critical open-source ecosystem by contributing upstream to Firecracker while shipping code that immediately powers top AI startups.

What you will do:

• Design and implement low-level virtualization features on a Firecracker fork, focusing on VM lifecycle and memory optimization.
• Develop kernel-level optimizations and custom device models to minimize latency and maximize throughput for specialized AI workloads.
• Profile and optimize critical paths in the VM creation pipeline while building robust monitoring and observability tools for production.

The ideal candidate:

• Deep proficiency in Rust and/or C/C++ with a strong understanding of Linux internals like KVM, virtio, and kernel memory management.
• Proven experience with virtualization technologies such as Firecracker, QEMU, or Cloud Hypervisor in a production or open-source context.
• Skilled in systems performance analysis using modern Linux features like eBPF or io_uring to debug across kernel and userspace boundaries.

Who are Jack & Jill?

Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.

And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.

Next steps

Step 1. Visit our website.

Step 2. Click 'Talk to Jack'.

Step 3. Talk to Jack so he can understand your experience and ambitions.

Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.

Step 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction.

Step 6. If not, Jack will find you excellent alternatives. All for free.

We never post fake jobs

This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.

Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.

We appreciate this can make them look a bit suspect, but there isn't much we can do about it.

Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.