Member of Technical Staff (Quality Analyst, Search)

Team: Search
Location: Belgrade
Employment type: FullTime

Perplexity is looking for an experienced analyst to help us build and improve our core search technologies. 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.

This role is hybrid in Belgrade, London or Berlin.

Responsibilities

• Find and diagnose quality issues in our search pipeline
• Design metrics from scratch to track and measure search quality
• Build datasets for model training, including LLM-as-a-judge labeling pipelines
• Improve search snippet quality and page selection algorithms for indexing
• Design and analyze A/B experiments to validate improvements

Qualifications

• 4+ years of experience as a data analyst or in a related role
• Strong coding skills — expected to write production-grade code at a mid-level backend engineer level
• Proficiency with SQL and Python
• Demonstrated hands-on experience with at least one of the following:
  • Designing metrics from scratch (not just analyzing existing A/B experiments)
  • Building labeling pipelines using LLM-as-a-judge
  • Training ML models that shipped to production with measurable metric improvements
  • Designing evals with known ground truth (e.g. SimpleQA, BrowseComp) or driving meaningful improvements on such evals

Preferred Qualifications

• Experience working on search-related products
• Knowledge of statistics and A/B experiment design
• Experience with Apache Spark or Databricks