CopilotKit is the #1 open-source platform for building AI Copilots—intelligent agents designed to work alongside people inside real products. In under 18 months, we’ve built a fast-growing and highly active community (18k+ GitHub stars, tens of thousands of weekly installs, millions of copilot interactions, double-digit MoM growth), are already monetizing at the enterprise level, and are used by companies ranging from startups to Fortune 100s—powering both SaaS Copilots and “Cursor for anything” coworker Copilots.
We’re emerging as the default for a critical part of the AI stack: the agent/user interaction layer. CopilotKit brings agents out of demos and terminals and into production—through deep integrations with the leading AI infrastructure companies and hyperscalers.
Backed by $6.5M (lead by SignalFire), our small, fast-moving team is building the infrastructure that will define how user-interactive AI is actually used in the real world. This is a unique opportunity to join as a founding engineer on one of the most complex and high-leverage surfaces in AI—with significant scope for technical, product, and leadership growth.
As a Senior or Staff Dev Infra Engineer at CopilotKit, you’ll be a key individual contributor helping define and build the core infrastructure behind the agent/user interaction layer—powering the next generation of AI-native apps. You’ll work across our open-source and enterprise platforms, focused on making it seamless for developers to integrate AI copilots deeply into their products.
This is a deeply technical role at the intersection of frontend frameworks, backend frameworks, TypeScript APIs, real-time systems, and AI agent runtime protocols. You’ll help shape the developer experience, reliability, and scalability of infrastructure already used by tens of thousands of developers—and soon millions. You’ll collaborate with top teams across the AI infra ecosystem—from leading open-source frameworks, to hyperscalers, to cutting-edge product teams building AI into real applications.
You’ll primarily work on complex infrastructure upstream of our headless UI layer—the foundation that brings agents into production-grade, user-facing applications.