Systems Engineer

Riza

About Riza

AI writes code. Riza runs it.

Our customers run code billions of times a month on Riza to power use cases like extracting data from unknown formats by asking claude-3-7-sonnet to generate Python on-the-fly.

We’re second-time founders, with decades of combined experience at Twilio, Stripe and Retool. We work out of a converted warehouse next to Tartine Manufactory in San Francisco. We’re looking to hire three to four engineers to join us in‑person.

The Role

Our raison d’etre is safely running untrusted code for our customers. There’s no better language to do that than Rust. We’re built on top of open source foundations (wasmtime, Deno, and Firecracker) with plenty of proprietary bits to make code execution safe.

We’re looking to add another Rust expert to our team to help us quickly respond to customer feedback and improve our already lightning‑fast performance.

Who are you?

  • You’ve been writing Rust for at least a few years.
  • You’re excited about contributing back to open source.
  • You’re comfortable operating in a world of fuzzy requirements.
  • You care about moving fast and not breaking things.
  • You’re okay not writing Rust some days.

Bonus Points

  • Experience with Linux primitives such as cgroups, network namespaces, kvm, journaling filesystems, and more.
  • Familiarity with Go, TypeScript and PostgreSQL

Benefits

  • Founding team equity
  • Health / dental / vision
  • 401k
  • Team breakfast at Tartine every month
  • ChatGPT Pro / Claude Pro / Cursor

Company Details

Riza

HQ: San Francisco, CA, US

Company Overview

Employees: ████████
Founded: ████
Last Round: ████████
Amount: ████████
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About

Riza provides isolated runtimes for executing untrusted code, primarily generated by LLMs, using a combination of WebAssembly, V8, and microVMs. They enable AI applications to be more powerful and reliable by giving LLMs the ability to run code securely and efficiently, handling billions of executions per month. Customers use Riza for tasks like on-the-fly data parsing, data analysis, and enabling agentic workflows.
Post Date: February 12, 2026