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Member of Technical Staff, Model Behavior

San Francisco💼 Full-time🗓 2026-07-30 → 2026-09-26

Core

Designing prompt and context engineering strategies to shape Perplexity's AI products, including response style, tool usage, and memory integration.

Role type

Senior IC software engineer specializing in LLM behavior and context engineering

Builds

Prompt strategies, context systems, and self-improvement loops for AI products

Domain

Artificial Intelligence / Large Language Models

Deliverable

production ML models

Required skills

Software engineering fundamentals, LLM-driven system architecture, prompt engineering, context engineering, tool and skill design, memory system design, experimental design, research analysis

Preferred skills

Modern LLM product experience, cross-team collaboration, AI system benchmark design

Technologies

LLM frameworks, prompt engineering tools, memory systems

Responsibilities

Design, test, and optimize prompts, skills, tools, and memory to shape model behavior; Experiment with and release new models; Identify failure modes in model outputs through research projects; Share best practices in prompt design across teams; Track and integrate latest alignment techniques from industry and academia

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