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AI Engineer

Arcade AI, Inc.· Engineering
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San Francisco, CA$230kFull-timePosted 2mo ago

About the role

Building AI agents with production-grade tools, governance, and safety to enable real actions inside enterprise systems. Responsible for developing agent harnesses, MCP/server services, toolkits/abilities, and evaluation methods to productionize AI-powered actions at scale.

Responsibilities

  • Build the systems that build systems - dedicated agent harnesses that write and maintain tools themselves, plus agents-as-tools (sub-agents) that let one agent call another as a capability
  • Take a job to be done and own delivering it - whether that's changes to the Arcade Engine, a new MCP, a new service, or something nobody's built yet
  • Build new toolkits and abilities - turn a vendor's API (or an internal need) into tools, skills, or agent abilities that get customers a real outcome, not just a demo
  • Fix the rough edges - when an agent hits a wall, figure out what's missing and build it, at the scale of every customer who'll hit that same wall
  • Maintain and improve the existing catalog - fix breakages, sharpen tool descriptions and response shapes, keep quality high as upstream APIs change
  • Build the next generation of evaluation and testing for abilities - go beyond pass/fail checks to know, programmatically, what a tool is actually doing across agents, models, and surfaces
  • Engage with and push the MCP ecosystem, where the standards for agent tools are still taking shape

Qualifications

  • 4+ years of software engineering experience shipping production code, with a track record of owning projects end to end
  • Strong Python and/or TypeScript
  • Experience building and consuming APIs at scale - REST, auth flows, pagination, rate limits, and the messy parts of real-world integrations
  • A real desire to build the parts of this stack that don't exist yet - comfortable when the answer isn't known and you have to figure it out
  • LLM application experience - prompting, retrieval, tool use, or agent design
  • A testing mindset - tests and evals that catch real failures, not just green checkmarks
  • Comfort with ambiguity - early team, a narrow charter that will expand, decisions made with incomplete data
  • Stop-at-nothing energy to get the job done

Skills

Required:PythonTypeScriptAPI design and consumptionLLM / AI toolingTesting and evaluation

Benefits

  • competitive salary
  • equity
  • benefits
Last updated Sep 23, 2026. Interested? Apply on the company site.

About Arcade AI, Inc.

Go Beyond Chat: Make AI actually do things.

Arcade is an AI Tool-calling Platform. For the first time, AI can securely act on behalf of users through Arcade's authenticated integrations, or "tools" in AI lingo.

AIAPIsDeveloper ToolsToolsai-infrastructure-and-developmentwing-list-2026wing-list-2026-early-stage
Company profileWebsite

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