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Perplexity Logo Perplexity · IT - Software Development

Software Engineer, AI Platform

United States, San Francisco, Palo Alto 210000.00 - 385000.00 USD / Year · Job Posted February 21, 2026
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Job Description

Perplexity is seeking an experienced Software Engineer focusing on building the next-gen AI Foundation & Platform to help revolutionize the way people search and interact online. In this role, you'll help build Perplexity’s end-to-end AI data, evaluation and personalization infrastructure and flywheel which powers almost all agent products.

Job Responsibility

  • Collaborate closely with AI Product, Applied ML, Post-Training, and Data Science teams to design, build, and maintain scalable data pipelines and data lakes
  • Develop high-performance infrastructure that powers personalization features including memory, discover, and agentic products
  • Create a scalable, multi-modal evaluation platform for all Perplexity AI products, including personalization, pro search, labs, deep research, and Comet
  • Design tools and abstractions on foundational infrastructure to enhance personalization, analytics, recommendations, AI products, and post-training capabilities
  • Holistically improve engineering foundation to support rapid growth of Perplexity products and international user base.

Requirements

  • Strong programming and data engineering skills, with proficiency in open source & distributed framework(AWS, Spark, Flink, Iceberg, DynamoDB)
  • Familiarity with cloud-based data services (e.g., AWS, RDS, DynamoDB), containerized infrastructure (e.g., EKS, Docker), and data streaming (Flink, Spark streaming, CDC)
  • Strong quantitative and engineering skills with experience in estimating performance at high scale
  • Experience supporting various ML/AI engineering teams to build scalable frameworks to accelerate R&D for frontier models and AI products
  • Experience iterating on improving LLM responses and set up proper evaluation framework or Judges to analysis performance holistically.
  • Self-motivated with a strong sense of ownership of systems and designs
  • 5+ years of industry experience in distributed systems or AI infrastructure

What we offer

  • equity
  • health
  • dental
  • vision
  • retirement
  • fitness
  • commuter and dependent care accounts
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