Software Engineer - Pretraining Data

Company: Magic
Location: Seattle
Posted on: May 24, 2025

Job Description:

Magic's mission is to build safe AGI that accelerates humanity's progress on the world's most important problems. We believe the most promising path to safe AGI lies in automating research and code generation to improve models and solve alignment more reliably than humans can alone. Our approach combines frontier-scale pre-training, domain-specific RL, ultra-long context, and inference-time compute to achieve this goal.About the role:As a Software Engineer working on our pretraining data, you write efficient and robust pipelines for giant, multimodal datasets. You will develop and optimize web scraping techniques to harvest and maintain data at internet-scale.What you might work on:

• Design & implement multimodal (video, audio, text etc) web crawlers for scraping and indexing petabytes of data
• Create large scale data processing pipelines using tools like Ray, Apache Spark, Apache Flink, Google BigQuery etc.
• Implement and scale deduplication techniques across modalities and apply heuristic and model-based techniques for parsing and filtering crawled data
• Identify new data sources for inclusion in pre/post-training datasetsWhat we're looking for:
  • Strong proficiency in distributed computing and parallel processing techniques
  • Obsession with details, reliability, and good testing to ensure data quality and integrity
  • Experience with designing and maintaining high-performance, scalable data architectures
  • Ability to design, develop and operate an LLM data pipeline from web scraping to data loadingMagic strives to be the place where high-potential individuals can do their best work. We value quick learning and grit just as much as skill and experience.Our culture:
    • Integrity. Words and actions should be aligned
    • Hands-on. At Magic, everyone is building
    • Teamwork. We move as one team, not N individuals
    • Focus. Safely deploy AGI. Everything else is noise
    • Quality. Magic should feel like magicCompensation, benefits and perks (US):
      • Annual salary range: $100K - $550K
      • Equity is a significant part of total compensation, in addition to salary
      • 401(k) plan with 6% salary matching
      • Generous health, dental and vision insurance for you and your dependents
      • Unlimited paid time off
      • Visa sponsorship and relocation stipend to bring you to SF, if possible
      • A small, fast-paced, highly focused team
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Keywords: Magic, Edmonds , Software Engineer - Pretraining Data, IT / Software / Systems , Seattle, Washington