Job Description

Quizlet is seeking a Principal Engineer to lead the technical design of its extensible learning ecosystem, including the Partner API platform, Connector services, and LearnOS plugin architecture. This role will shape Quizlet’s AI-powered integration layer for both human and agentic users, focusing on secure, scalable infrastructure for seamless learning experiences.

Responsibilities

• Own and evolve the external API gateway, SDKs, and developer tooling
• Design sandboxed plugin runtimes
• Architect Quizlet’s participation in agent-driven ecosystems
• Define APIs for external agents
• Implement audit, rate limiting, and permissions
• Design publish-subscribe infrastructure

Requirements

• 10+ years of engineering experience with large-scale API platforms
• Strong track record designing secure APIs, SDKs, and plugin systems
• Deep understanding of agent frameworks
• Experience building platform abstractions
• Expertise with containerized services, OAuth 2.0, gRPC/REST
• Fluency with platform security and system design
• Proven ability to lead architectural transformation

Benefits

• No benefits