Sr. Software Engineer, Pretraining Data

Highlights

• Build data systems behind frontier models' initial pretraining runs.
• Scale crawling and pipelines turning raw dumps into training datasets.
• Translate data quality gains into measurable model performance improvements.

What they offer

• equity
• comprehensive medical, vision, and dental coverage
• 401(k) retirement plan
• short & long-term disability insurance
• life insurance
• discounts and perks

Ideal candidate

High-slope senior engineer with deep distributed systems instincts who thrives on ownership. Excited by how pretraining data shapes model quality and motivated to mentor while shipping reliable systems at frontier scale.

Requirements

• 5+ years of professional software engineering experience building distributed systems and/or large-scale data infrastructure
• Strong infrastructure or data platform background with large-scale distributed systems intuition
• Able to architect and ship end-to-end with high ownership and debug complex systems independently
• Track record of leading technical projects across teams and mentoring other engineers