Member of Technical Staff (Model Behavior)

The role

Software engineers on the Model Behavior team design prompt and context engineering strategies. They shape how AI products behave, including response style and the use of tools, skills, and memory.

What you will do

• Design, test, and optimize prompts, skills, tools, and memory.
• Build self-improvement loops to steer prompts and improve tool/skill use and memory.
• Help experiment with and release new models.
• Identify inconsistencies and failure modes in model outputs through research projects.
• Help engineers across teams build intuition for prompt design and context engineering best practices.
• Track latest prompting, context engineering, and alignment techniques.

Required qualifications

• 2 to 10+ years of experience in software engineering or research.
• Strong background in software engineering fundamentals.
• Technical understanding of LLM-driven and agentic systems.
• Experience shaping LLM behavior through prompts, tool and skill design, or memory systems.
• Strong written and verbal communication skills.

Nice to have

• Recent experience working on modern LLM-driven products.
• Experience working across teams or with external partners.
• Experience designing evaluations or benchmarks for AI systems.

About the company

Perplexity is hiring software engineers for the Model Behavior team to shape how its AI products behave.