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Build and maintain infrastructure for reliable, large-scale web data collection. Improve success rates against sites with aggressive defenses, own proxy layer health/rotation/cost, push throughput under spiky load, and debug intermittent failures. Own systems end-to-end in production.

The Research Engineer will design and build evaluation systems to measure data quality for Firecrawl's web data extraction, creating metrics and benchmarks, and collaborating on model improvements.

Design, build, and operate crawling, indexing, and retrieval systems for large-scale web search. Improve latency, cost, ranking quality, and freshness. Own services end-to-end, ship iterations, and collaborate on roadmap with the search team.