AI Researcher

Perplexity is seeking 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 us in creating SOTA experiences that handle hundreds of millions of queries and continue to scale rapidly.

Team Structure

Depending on your interests and expertise, you'll work on one of three specialized teams:

1. Core Research Team (Horizontal)

Focus on generating and improving base models that power all our products. This team works on foundational model capabilities, post-training techniques, building RL infra and infrastructure that benefits the entire organization.

2. Agent Products Team (Vertical)

Concentrate on fine-tuning and optimizing models for our Deep Research Agent and Labs/Canvas products. This team bridges research and product, ensuring our agent capabilities deliver exceptional user experiences.

3. Comet Agent Team (Vertical)

Dedicated to developing and enhancing our Comet Agent product. This specialized team focuses on the unique requirements and optimizations needed for Comet's specific use cases.

Responsibilities

Research & Development

- 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

Infrastructure & Implementation

- Own full-stack data, training, and evaluation pipelines required for model development

- Build robust...