Perplexity

Perplexity

Posted via Ashby

Member of Technical Staff (Search Crawler Analyst)

Posted Oct 9, 2026

Role at a glance

Job function
AI & Data Machine Learning Engineering
Salary
Not Disclosed
Location
Belgrade London
Work arrangement
Hybrid
Employment
Full-time

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About the role

Original posting provided by Perplexity

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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. You’ll work at the intersection of data analysis and engineering — designing metrics, building data pipelines, and improving the quality of our search and answer systems.

Responsibilities

  • 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

Qualifications

  • 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

Nice to have

  • Direct experience working on web crawling or indexing pipelines

Perplexity

About the company

Perplexity

Startup

Perplexity is an innovative technology company that specializes in developing advanced artificial intelligence solutions aimed at enhancing human-computer interaction. With a focus on natural language processing and machine learning, Perplexity empowers users to access information and insights more intuitively and efficiently. The company is dedicated to creating tools that simplify complex data and foster informed decision-making, thereby transforming the way individuals and organizations engage with knowledge. Through its commitment to excellence and user-centric design, Perplexity is shaping the future of information retrieval and analysis.