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← Reflection AI

Member of Technical Staff - Web Crawl Engineer

Reflection AI · San Francisco, CA

CHECKED 20H AGO

Frontier labonsite
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At a glance

Highlights

  • Build web-scale crawling infrastructure across billions of URLs.
  • Own URL discovery, scheduling, and crawl orchestration systems.
  • Power frontier AI with fresh, diverse web data at scale.

What they offer

  • Top-tier compensation with salary and equity
  • Stock options for all contributors
  • Comprehensive medical, dental, vision and life insurance plus wellness allowance
  • Lunch and dinner provided in the office daily
  • 22 weeks paid parental leave for all new parents
  • Unlimited paid time off in the U.S. and 30 days in the U.K.
  • Visa sponsorship and long-term immigration support
  • Regular off-sites, happy hours and team celebrations

Ideal candidate

Distributed-systems engineer passionate about web-scale data collection and how web data shapes frontier models. Collaborates closely with researchers and thrives balancing coverage, freshness, quality, and efficiency.

Requirements

  • Experience building large-scale web crawling, search indexing, content acquisition, or internet-scale data collection systems
  • Strong understanding of crawling architectures, URL frontier management, scheduling, and distributed crawl coordination
  • Experience with large-scale distributed systems using technologies such as Ray, Spark, Beam, Flink, or similar frameworks
  • Familiarity with content extraction, HTML parsing, browser automation, rendering systems, and modern web technologies
  • Experience operating systems that process petabyte-scale datasets
  • Strong systems engineering skills, including reliability, observability, performance optimization, and debugging
  • Experience designing experiments and using data to improve crawl quality, coverage, and efficiency
  • Excellent communication skills and ability to reason about system tradeoffs and operational constraints
visa sponsorship
Visa sponsorship available with long-term immigration support

Lab profile

About Reflection AI

Research lab making intelligence open and accessible for everyone to use, customize, and build on.

What they build

  • Open foundation models
  • Aligned general agents
  • Enterprise AI deployments

Known for

  • Frontier model pre-training
  • Post-training and alignment
  • Distributed training infrastructure
  • Secure cloud platform foundations
More about Reflection AI →
Apply on the lab’s site ↗