Software Engineer, SDK
Keycard LabsIdentity and company
United StatesMid
Andreessen Horowitz
Acrew Capital
Boldstart Ventures
Mantis
Tapestry Ventures Capital
Essence VC
Software Engineering
About the role
TL;DR
Build and own the Keycard Agent SDK for AI agents in production.
- •We're hiring an engineer to join the team that builds and owns the Keycard Agent SDK
- •the libraries that bring trust, governance, and telemetry to AI agents in production.
- •Key Responsibilities Build the SDK libraries Maintain compatibility with upstream frameworks Contribute to open protocol work (MCP, A2A) Advocate for what agent developers actually need Work directly with founders, product, and the systems engineers building the underlying services Requirements Follow the agent ecosystem closely Strong systems engineering instincts Experience building libraries or SDKs Work across multiple languages without treating any of them as second-class
Required skills
GoPythonTypeScriptCI/CDDockerKubernetesOpenAPIOAuth
Nice-to-have skills
RustA/B TestingProduct AnalyticsFigmaVisual DesignMotion DesignSEOCopywriting
Benefits & perks
Comprehensive Benefits & Recharge, Tools That Keep You Ahead, Remote-First Flexibility
Tech stack
GoPythonTypeScriptRustOpenAPIOAuthCI/CDDockerKubernetes