Exa
Research Engineer, Index Intelligence
$180K–$350K
San Francisco, California · On-site · Full-time · Posted Oct 1, 2026
About the job
Own the machine-learning signals and decisions that determine which web pages Exa crawls, indexes, refreshes, deduplicates, or excludes to improve search.
What you'll do
- Develop and validate signals that guide crawling and indexing decisions, demonstrating their impact on search.
- Build models for page quality, credibility, misinformation, and whether pages are useful to readers or designed for crawlers.
- Determine whether documents are semantically duplicative or meaningfully distinct.
What they ask for
- Hands-on ML experience with classifiers, rankers, and calibration.
- Strong data instincts at web scale.
- Comfort owning problems without ground truth and defining what a correct answer means.
- Ability to work across crawling, indexing, and retrieval teams.
Pay
$180K – $350K (base salary)
Tools
classifiers, rankers
AI focus
Apply machine learning to web-page quality, credibility, misinformation, parsing, and document deduplication for search indexing.
Model-written summary · the original posting is authoritative