• Using information from monitoring systems to pinpoint issues • Bringing old code into line with new standards • Helping build and scale back-end services and APIs • Infrastructure maintenance and scaling tasks, including infrastructure-as-code • Working with internal teams to find and implement innovative solutions to current bottlenecks in workflows • Writing, testing, and reviewing high-quality, maintainable code

• Design and ship customer-facing APIs • Partner with researchers to productionize new techniques • Work with Applied teams to understand user interactions • Contribute across the stack

• Coordinate with clients and other I.T. personnel in analyzing system requests, developing specifications for new system development projects or for maintenance to existing mainframe-based applications. • Adhere to System Development Life Cycle standards, including preparation of project-related documents as requested by the Project Manager. • Make design changes to programs, either alone or in concert with other programmers. • Prepare unit and integration test plans for program changes, and in cooperation with clients and other I.T. personnel, perform the testing. • Conduct thorough problem analysis regarding technical system and application programs; documents findings and proposes problem resolution alternatives. • Some on-call responsibilities to support production as needed. • Communicate effectively with technical and non-technical audiences. • Communicate project progress and issues as needed. • Prepare user and operational documentation for programming work performed. • Serve as a Project Lead for smaller or less complex projects. • Serve as a mentor for less experienced engineers as needed. • Serve as a ‘go-to’ resource for complex questions. • Be a participatory team member, share knowledge, assist with projects as needed and suggest improvements for the system development process. • Minimal travel required on an as needed basis.

Role Description We’re looking for a platform engineer to lead the architecture and evolution of our core runtime. This is not a typical backend role. You’ll define how untrusted AI agents execute safely, how systems scale under load, and how we meet security and compliance standards from first principles. You’ll work directly with the founder and own the platform end-to-end: from low-level runtime design to distributed scheduling to production reliability. What You’ll Own - Design and build our agent runtime infrastructure (Firecracker, Rust, Go) - Define and enforce security boundaries for running untrusted code - Lead SOC2 and compliance efforts from a systems perspective (not paperwork—actual guarantees) - Architect and implement scheduling and orchestration systems (Kubernetes-level problems, without blindly copying Kubernetes) - Own performance, isolation, and reliability at scale - Set technical direction and raise the bar for engineering across the company Qualifications - You’ve built and operated distributed systems or infrastructure at scale - Strong systems background (concurrency, isolation, networking, performance) - Experience with Go and/or Rust (or willingness to go deep quickly) - Deep intuition for security and reliability, not just features - You care about how things fail, not just how they work - You’ve taken systems from 0 → 1 or 1 → scale - You’re comfortable making high-stakes architectural decisions with incomplete information Bonus - Experience with Firecracker, microVMs, containers, or sandboxing - Experience with Kubernetes or building schedulers - Experience leading or owning SOC2 / compliance in infra-heavy environments Why This Role Matters AI agents are unreliable, unsafe, and hard to run in production today. We’re fixing that. This role is about building the foundation that makes intelligent systems actually usable in real-world environments—fast, secure, and dependable. If we get this right, a whole new category of software becomes possible. Working With Us - Small, high-ownership team - Work directly with the founder - Real technical authority and decision-making power - No layers, no committees—just building Bar for This Role This is a high-ownership, high-agency role. We’re looking for someone who wants to own a critical layer of the stack, not just contribute to it. California Pay Range $165,000 — $230,000 USD