Staff AI Research Scientist

Perplexity; San Francisco (CA); On-site; USD 180,000 - 260,000; Full time

Job summary

Perplexity in San Francisco seeks top-tier AI Research Scientists and Engineers to advance our AI products and capabilities. We're building the future of AI-powered search and agent experiences through our Sonar models, Deep Research Agent, Comet Agent, and Search products.

Join one of three specialized teams—Core Research, Agent Products, or Comet Agent—and turn research ideas into deployable algorithms. You’ll own training and evaluation pipelines and help scale models to handle hundreds of

Responsibilities

• Post-train SOTA LLMs using the latest supervised and reinforcement learning techniques (SFT/DPO/GRPO)
• Leverage our rich query/answer dataset to scale model performance across Sonar, Deep Research, Comet, and Search products
• Stay current with the latest LLM research, especially in model training, optimization, and personalization techniques
• Implement preference optimization and personalization capabilities to enhance user experience
• Invent in-house improvements and optimizations to enhance SOTA models
• Turn research ideas into algorithms and run experiments to launch new models
• Own full-stack data, training, and evaluation pipelines required for model development
• Build robust and effective training frameworks (on top of M

Job description

Perplexity in San Francisco seeks top-tier AI Research Scientists and Engineers to advance our AI products and capabilities. We're building the future of AI-powered search and agent experiences through our Sonar models, Deep Research Agent, Comet Agent, and Search products.

Join one of three specialized teams—Core Research, Agent Products, or Comet Agent—and turn research ideas into deployable algorithms. You’ll own training and evaluation pipelines and help scale models to handle hundreds of