About StackOne

StackOne is the AI Integration Gateway powering the next generation of SaaS and AI Agents. Backed by GV , Workday Ventures , and angels/advisors from DeepMind, OpenAI, GitHub, and Mistral , we’ve raised $24M to enable developers to orchestrate thousands of secure, scalable, and accurate actions in AI Agents.

With an AI-native integration toolkit that delivers real-time execution, managed authentication, granular permissions, and full observability—built with safety at its core—we’re now doubling down on AI R&D and creating our own lab to push the boundaries of tool calling for agents: training specialized LLMs designed to outperform general‑purpose models in what matters most: precision, reliability, and safety in agentic execution.

About The Role

We’re looking for full‑stack engineers who can ship fast, think in systems, and obsess over scalabil...