The role is part of Anthropic's Sandboxing team, focusing on building and operating isolation layers for untrusted code executed by Claude. Responsibilities include designing infrastructure, improving performance and security, developing monitoring tools, supporting reinforcement learning environments, and collaborating with research, product, and security teams to ensure reliable and efficient sandboxing at scale.
Software Engineer, Sandboxing na Anthropic
Híbrido - San Francisco, CA, New York City, NY
Ver mais vagas na AnthropicSalary
USD 320,000 - 485,000
Requirements
Skills
- Software engineering experience in Linux systems programming, kernel development, or another low-level area
- Strong programming skills in at least one systems language such as Rust, C, C++, or Go
- Working knowledge of virtualization or container isolation technologies such as KVM, QEMU, Firecracker, gVisor, or runc
- Understanding of Linux resource management, including namespaces, cgroups, scheduling, and memory management
- Experience profiling and debugging performance issues at the system level
- Ability to work in unfamiliar codebases and technical areas, and to ship practical solutions with measurable results
- Strong communication skills and a commitment to building safe, reliable systems
- Experience building or operating a multi-tenant sandbox, serverless, or code execution platform
- Experience with microVMs, user-space kernels, or lightweight virtualization, including snapshot and restore
- Experience with OS-level security hardening, including seccomp, LSMs, and threat modeling of untrusted code
- Experience with eBPF and kernel tracing tools
- Experience with Kubernetes and cloud infrastructure at scale (AWS, GCP)
- Experience with network isolation, high-performance networking, or building egress proxies and policy layers
- Experience with sandboxes for AI agents, computer use, or reinforcement learning environments
- Experience with GPU virtualization, accelerators, or performance work on machine learning workloads
- Prior experience as a technical lead or mentor
Responsibilities
- Design, build, and operate the sandboxing infrastructure that runs untrusted, model-generated code and agent workloads at scale
- Improve sandbox startup time, density, and throughput, including snapshot and restore, checkpointing, and warm pools
- Strengthen isolation across compute, filesystem, and network, including egress controls and per-session credential handling
- Investigate and fix performance, reliability, and security issues at the kernel, hypervisor, and container runtime level
- Build the monitoring, tracing, and debugging tools that show where time and resources go inside a sandbox
- Work with researchers to support reinforcement learning environments and evaluations that need fast, reproducible, isolated execution
- Work with product and platform engineers to expose sandboxes as a dependable, well-designed capability for Claude products and customers
- Partner with security teams to threat-model the platform and to test, harden, and respond to escape and abuse scenarios
- Work with cloud providers on the hardware and platform features that our workloads depend on
- Share knowledge on systems programming and Linux internals, and help set technical standards for the team
Technologies
RustCC++GoLinux kernelKVMQEMUFirecrackergVisorrunceBPFKubernetesAWSGCPOS-level security hardeningseccompLSMsnetwork isolationcloud infrastructureGPU virtualization
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