Developer Experience Engineer: SDK & CLI for AI Runtime

Runta; San Francisco, Northern (CA, KY); Hybrid; USD 150,000 - 200,000; Full time

Benefits offered by this job

Open source involvement

Equity

Developer advocacy

Technical writing experience

Job summary

Runta in the SF Bay Area is seeking a Mid-level developer to design and ship the SDK and CLI that developers use to run, snapshot, branch, and replay agents. You will translate runtime concepts into friendly APIs, write examples and docs, and iterate quickly with the founder and runtime teams.

Ideal candidates have strong API taste, experience building developer tools, and a knack for clear documentation. This role emphasizes fast iteration, clean surfaces, and a focus on developer experience.

Qualifications

• You’ve built developer-facing product surfaces: an SDK, a CLI, a public API, or a devtools product people chose to use
• Exceptional API taste, with opinions you can defend about what to expose, what to hide, and what to name things
• You write clearly. Docs, examples, and error messages are product surfaces here, not chores
• You can read the systems underneath: you don’t need to build a hypervisor, but you need to understand what one is, so your abstractions don’t lie
• You genuinely enjoy solving user problems and get satisfaction from someone else’s “oh, that was easy”

Responsibilities

• Design and build Runta’s SDK and CLI: the primary surface through which developers run, snapshot, branch, and replay agents
• Make API design decisions with long consequences: what to expose, what to hide, what to name things
• Build the examples, quickstarts, and reference docs that take a developer from curiosity to a running agent
• Turn runtime capabilities into product language: translating “microVM snapshot semantics” into things agent builders immediately want
• Feel every rough edge first and fix it: error messages, failure modes, onboarding friction
• Represent the developer inside the company: your feedback shapes what the runtime team builds next

Skills

Developer tools

API design

Technical writing

Systems thinking

User empathy

Job description

Runta in the SF Bay Area is seeking a Mid-level developer to design and ship the SDK and CLI that developers use to run, snapshot, branch, and replay agents. You will translate runtime concepts into friendly APIs, write examples and docs, and iterate quickly with the founder and runtime teams.

Ideal candidates have strong API taste, experience building developer tools, and a knack for clear documentation. This role emphasizes fast iteration, clean surfaces, and a focus on developer experience.