Research Engineer, Index Intelligence

Exa is building a revolutionary AI-powered search engine and is seeking a Research Engineer to own the intelligence behind our web crawling and indexing decisions. You will develop and implement machine learning models that determine which web pages are most valuable to index, ensuring our search engine remains efficient and comprehensive. This role offers a unique opportunity to shape the future of information retrieval at massive scale.

• Develop ML models for web page quality assessment and deduplication
• Own the signals and decisions for what content gets indexed
• Experience with classifiers, rankers, and calibration at web scale
• Drive end-to-end impact across crawling, indexing, and retrieval teams
• Comfortable defining problems with no pre-existing ground truth
• Passion for finding and organizing high-quality knowledge