jobs

Pre-training Data Infrastructure Engineer

Anthropic is seeking a Staff-level engineer to join its Pre-training team and help develop the next generation of large language models. This role sits at the intersection of machine learning research and high-scale software engineering, wi

Company

Anthropic

Location

San Francisco, CA, United States

Status

Closed

Posted

2026-09-20T03:33:46.027+00:00

Anthropic is hiring a staff engineer for its Pre-training team in San Francisco. The job is to build the data infrastructure that turns raw web-scale corpora into training-ready datasets: scalable tokenization, deduplication and chunking primitives, quality-assurance and validation systems, and end-to-end pipelines, while working with researchers on new data-processing designs. The posting asks for deep experience with high-throughput, fault-tolerant distributed systems, Apache Spark, Python and Rust, plus reliability and performance focus. The role is hybrid, generally expecting at least 25% office time.