# AI Researcher

**Company**: Perplexity
**Location**: San Francisco, Palo Alto
**Work arrangement**: onsite
**Experience**: senior
**Job type**: full-time
**Salary**: $220K – $485K
**Category**: Engineering
**Industry**: Technology

**Apply**: https://jobs.ashbyhq.com/perplexity/8fe61c73-0daf-4432-a47d-44714c1ef764
**Canonical**: https://yubhub.co/jobs/job_46711770-4ab

## Description

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.

## What you'll do

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

## What you need

- Proven experience with large-scale LLMs and Deep Learning systems

## Skills

### Required
- large-scale LLMs
- Deep Learning systems
- Python/PyTorch
- post-training techniques
- reinforcement learning

### Nice to have
- PhD in Machine Learning, AI, Systems, or related areas
- C++/CUDA programming skills
- experience building LLM training frameworks
- academic publications and research impact
- experience with agent systems and multi-step reasoning
- background in personalization and preference learning