Runta cuts what agents waste, bounds what they can reach, and records everything they did. Backed by a16z.
About the role
This is the foundation of Runta. You will build the execution engine itself: the layer where agent processes actually run, get snapshotted, get resumed on different hardware, and recover from crashes without losing state.
What they're looking for
- You’ve built systems at the engine level: an OS kernel, a hypervisor or VMM (KVM, Firecracker, cloud-hypervisor, Xen), a database storage engine, or a language runtime (JVM, Go runtime, V8 internals)
- Muscle memory for memory layout, syscall boundaries, context switch costs, and crash recovery: you’ve debugged problems where timing and state transitions mattered, not just logic
- You can reason about copy-on-write, page sharing, and dirty tracking from first principles
- Comfort working close to the metal in Rust, C, or C++
- Staff level: you’ve also owned the architecture of such a system and made trade-offs you can defend years later
- Nice to have: CRIU or live-migration experience, io_uring, experience making cold starts fast at scale
More about this role
Runta builds runtime infrastructure for long-running AI agents: efficient execution, enforceable access controls, and complete execution records.
We’re a small, well-funded team based in the San Francisco Bay Area and Singapore. High talent density. High ownership.
Runta builds runtime infrastructure that lets AI agents execute reliably over long time horizons: run agents efficiently, govern what they can reach, and record what they did. Workloads that run for hours or days break the assumptions web infrastructure is built on. An agent can fan out fifty sub-tasks in a second and then go idle for ten minutes, must survive instance recycling mid-run, and needs to snapshot, resume, and branch its execution state the way developers branch code. We’re building the substrate that makes this possible.
We’re a small, well-funded team, moving fast.
This is the foundation of Runta. You will build the execution engine itself: the layer where agent processes actually run, get snapshotted, get resumed on different hardware, and recover from crashes without losing state.
Runta does three things: run, govern, record. This role owns run and builds the mechanisms that make record trustworthy. When...
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