Model Capabilities Engineer (AI)

Location: Must be based in or able to work from San Francisco, CA or New York, NY (Hybrid: Mon, Tue, Thu in-office)

Salary: $255,000 – $300,000 per year

Company

Notion is a collaborative AI workspace designed to unify knowledge, projects, and tools into a single, efficient platform.

What you will do

• Integrate new frontier models into production to ensure they are available for users and engineers.
• Improve inference reliability through better error categorization, self-healing retries, and cross-provider failover.
• Own observability for the model layer to reduce time to detection and resolution.
• Develop new model-level capabilities and support product teams in their adoption.
• Act as connective tissue across AI teams to identify gaps and unblock development.

Requirements

• Must be based in San Francisco or New York City and available for in-office work on Mondays, Tuesdays, and Thursdays.
• Proven experience building and operating systems on top of LLM APIs in production.
• Deep understanding of token economics, streaming, tool calling, and context limits.
• Ability to define and use data-driven evaluations to measure model performance.
• Strong instincts regarding the trade-offs between latency, cost, and output quality.
• Intellectual curiosity and a pragmatic approach to the rapidly changing AI landscape.

Culture & Benefits

• Highly competitive cash compensation, equity, and comprehensive benefits.
• Collaborative environment focused on craft and human-centric AI development.
• Anchor Days (Mon, Tue, Thu) dedicated to in-person collaboration and building.
• Commitment to equal opportunity and inclusive hiring practices.