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About the Role

As a Software Engineer on the AI Infrastructure team, you'll help build and evolve our agent sandboxing platform — the secure, high-performance code execution layer powering our agentic workflows, deployed across both internal and customer-managed environments. This is a role for someone who cares as much about the experience of the engineers and researchers using this system as they do about the kernel internals underneath it. You'll combine deep systems expertise (isolation, virtualization, performance) with an obsession for developer experience: clean APIs, clear error messages, good docs, and a client library that feels well-crafted. You'll partner closely with internal teams to understand how they use the platform, debug their issues, and shape a roadmap that balances immediate needs with long-term architecture.

Responsibilities

Design and build the sandboxing platform, client library, and API surface for secure code execution across containerized and virtualized environments
Ensure strong isolation, security, and reproducibility of execution across user sessions and workloads
Optimize for cold-start latency, memory footprint, and resource utilization at scale
Drive down error rates through systematic debugging, monitoring, and proactive fixes
Partner closely with internal teams using the platform to understand their needs, debug issues, and build tooling that serves their use cases
Respond to incidents and production issues with urgency, conducting root cause analysis and implementing preventive fixes
Help develop and maintain a product roadmap for sandboxing, balancing immediate needs against long-term architectural investment
Lead architecture reviews and own projects end-to-end, from design through deployment, in fast-paced cross-functional settings

Requirements

4+ years of experience building high-performance systems software, with meaningful time spent maintaining libraries, SDKs, or developer-facing APIs
Deep understanding of Linux internals: process isolation, memory management, cgroups, namespaces, etc.
Experience with containerization and virtualization technologies (e.g., Docker, Firecracker, gVisor, QEMU, Kata Containers)
Proficiency in a systems programming language such as Go, Rust, or C/C++
A track record of obsessing over developer experience — API design, error propagation, documentation, and the small details that make a library feel well-crafted
Comfort working across infrastructure layers, from kernel modules to orchestration frameworks (e.g., Kubernetes)
Strong debugging skills and the ability to navigate performance/security tradeoffs in production systems
Comfort with ambiguity, and the ability to context-switch between reactive incident work and proactive product development

Skills

Linux internals
Containerization
Virtualization
Go
Rust
C/C++
API design
Developer experience
Kubernetes
Debugging
LLM agents
Agent frameworks
Snapshotting
Restore techniques

Location

San Francisco
New York
Seattle

Work Type

Full-time

Experience Level

4+ years

Salary/Compensations

$180,000—$225,000 USD

Benefits

Comprehensive health, dental and vision coverage
Retirement benefits
Learning and development stipend
Generous PTO
Commuter stipend

About the Company

At Scale, our mission is to develop reliable AI systems for the world's most important decisions. Our products provide the high-quality data and full-stack technologies that power the world's leading models, and help enterprises and governments build, deploy, and oversee AI applications that deliver real impact. We work closely with industry leaders like Meta, Ernst & Young, Mayo Clinic, Time Inc., the Government of Qatar, and U.S. government agencies including the Army and Air Force. We are expanding our team to accelerate the development of AI applications.

Equal Opportunity

We believe that everyone should be able to bring their whole selves to work, which is why we are proud to be an inclusive and equal opportunity workplace. We are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability status, gender identity or Veteran status.
We are committed to working with and providing reasonable accommodations to applicants with physical and mental disabilities. If you need assistance and/or a reasonable accommodation in the application or recruiting process due to a disability, please contact us at accommodations@scale.com. Please see the United States Department of Labor's Know Your Rights poster for additional information.
We comply with the United States Department of Labor's Pay Transparency provision.