Model Behavior Architect

Perplexity is an AI-powered answer engine founded in December 2022 and growing rapidly as one of the world’s leading AI platforms. Perplexity has raised over $1B in venture investment from some of the world’s most visionary and successful leaders, including Elad Gill, Daniel Gross, Jeff Bezos, Accel, IVP, NEA, Nvidia, Samsung, and many more. Our objective is to build accurate, trustworthy AI that powers decision-making for people and assistive AI wherever decisions are being made. Throughout human history, change and innovation have always been driven by curious people. Today, curious people use Perplexity to answer more than 780 million queries every month–a number that’s growing rapidly for one simple reason: everyone can be curious. 

Perplexity is looking for a Model Behavior Architect to help shape systems that reliably answer users' questions.

Responsibilities

• Design, refine, and implement prompt engineering strategies to guide model behavior across research and general knowledge use cases
• Identify edge cases and behavioral inconsistencies in model outputs through structured testing and prompt iteration
• Develop automated and semi-automated pipelines for evaluating prompt effectiveness at scale
• Work cross-functionally with researchers, PMs, and engineers to align model behavior with product goals
• Collect and synthesize qualitative and quantitative feedback to inform prompt design improvements
• Collaborate on prompt libraries and reusable frameworks for internal and production-facing systems
• Stay current with the latest prompt engineering, alignment, and evaluation techniques from both industry and academia

Qualifications

• Demonstrated passion for AI and can share specific prompt engineering and chaining projects you're proud of
• Background in philosophy, psychology, linguistics, data science, or related fields
• Familiar with Python and running simple scripts
• High-level understanding of LLMs, training, RL
• Excellent communication skills, particularly in teaching complex concepts
• Creative problem-solving abilities with a "hacker spirit" for solving puzzles

Final offer amounts are determined by multiple factors, including, experience and expertise, and may vary from the amounts listed above.
 
Equity: In addition to the base salary, equity may be part of the total compensation package.
Benefits: Comprehensive health, dental, and vision insurance for you and your dependents. Includes a 401(k) plan.