Software Engineer, Multi-Tenant Cloud & Sandboxes (Remote)

ContentBuffer; San Francisco (CA); Remote; USD 180,000 - 240,000; Full time

Benefits offered by this job

Competitive compensation & meaningful"

Equity

100% medical/dental/vision for depend.

Flexible PTO including Winter Break

Parental leave

401(k) matching

Job summary

Baseten is seeking a Software Engineer to advance its Sandboxes platform, focusing on microVM lifecycle, isolation, and high-performance virtualization. The role spans kernel boundaries, guest-host interaction, and multi-tenant security on bare-metal and cloud infrastructure.

You will contribute to KVM/Firecracker-based architectures, optimize Linux internals, and drive end-to-end performance improvements in a fast-growing AI infrastructure company.

Qualifications

• Hands-on experience with KVM and Firecracker, Cloud Hypervisor, or QEMU.
• Deep Linux internals: namespaces, cgroups, memory management, boot path.
• Experience building multi-tenant cloud infrastructure with strong isolation.
• Systems programming in Rust and/or Go; C/C++ welcome.

Responsibilities

• Own the microVM lifecycle for agent sandboxes: start, stop, suspend, resume, snapshot, fork.
• Tune guest kernels and host CPU/memory for performance on each hardware type.
• Manage host resources and sandbox density across machines.
• Own startup and resume performance end to end from VM boot to first command.
• Design isolation for multi-tenant workloads where the hypervisor is the security boundary.
• Debug virtualization issues across userspace to kernel and hardware; contribute architecture decisions.

Skills

KVM

Firecracker

Cloud Hypervisor

QEMU

Rust

Go

C/C++

Container runtimes

Tools

containerd

runc

gVisor

Kata Containers

Job description

Baseten is seeking a Software Engineer to advance its Sandboxes platform, focusing on microVM lifecycle, isolation, and high-performance virtualization. The role spans kernel boundaries, guest-host interaction, and multi-tenant security on bare-metal and cloud infrastructure.

You will contribute to KVM/Firecracker-based architectures, optimize Linux internals, and drive end-to-end performance improvements in a fast-growing AI infrastructure company.