Member of Technical Staff (Search Crawler Analyst)

Job summary

Responsibilities

The internet is vast, containing trillions of URLs. Perplexity’s crawling and storage system is complex and has multiple stages (URL discovery, crawling, parsing, indexing). Each stage offers many opportunities for improvement and room for intricate bugs.

• Find and diagnose quality issues in our crawling pipeline
• Train small models that optimize particular aspects of the pipeline (e.g. parsing quality)
• Build datasets for model training, including LLM-as-a-judge labeling pipelines
• Improve page selection algorithms for indexing
• Design and analyze experiments to validate improvements

What they're looking for

• 4+ years of experience as a data analyst, ML engineer, or in a related role
• Strong coding skills: you should be able to write production-grade code at the level of a mid-level backend engineer
• Experience designing metrics from scratch
• Experience training ML models that shipped to production with measurable metric improvements