Job Description

Quizlet is seeking a Senior Staff Engineer to lead engineering on their external API platform and LearnOS plugin architecture. This role involves designing integration patterns for partner applications, guiding API best practices, and building infrastructure for seamless learning workflows across external platforms and AI agents. The position is onsite in San Francisco, requiring a minimum of three days a week in the office.

Responsibilities

• Design and implement APIs powering partner experiences and agentic workflows
• Develop MCP and agentic services to build the learnOS of Quizlet
• Lead cross-team initiatives to deliver secure, rate-limited, and discoverable APIs
• Build infrastructure for Quizlet widgets and embedded experiences
• Mentor engineers and influence platform development standards

Requirements

• 10+ years of engineering experience with large-scale, multi-tenant API or developer platforms
• Strong track record designing extensible, secure APIs, SDKs, and plugin systems
• Understanding of agent frameworks like MCP, protocol design, and AI/LLM interoperability
• Experience building platform abstractions and developer enablement layers
• Hands-on expertise with containerized services, OAuth 2.0, gRPC/REST, and event-driven systems
• Fluency with platform security, privacy, and system design
• Proven ability to lead architectural transformation
• Strength in cross-functional collaboration

Benefits

• No benefits