Staff Research Engineer, Pre-training Data

Reddit(4 days ago)

RemoteFull TimeSenior$230,000 - $322,000AI Engineering

About this role

Staff Research Engineer for Pre-training Data at Reddit will define the technical strategy and architecture for data curriculum pipelines that power Reddit-native foundational LLMs. The role focuses on transforming Reddit’s large multimodal conversational corpus into high-quality training signals and building scalable infrastructure to feed distributed training clusters. This position supports Reddit’s AI products across Safety, Moderation, Search, Ads, and next-generation user experiences.

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Required Skills

Python
Distributed Processing
Ray Data
Spark
Data Sampling
Curriculum Learning
PII Redaction
Graph Data
Multimodal Data
Rust

+3 more

About Reddit

redditinc.com

Reddit is a social news and discussion platform where users submit links, posts, and media into topic-based communities called subreddits. Content is surfaced and ranked by user voting and threaded discussions, and the site hosts popular formats like AMAs (Ask Me Anything) and community-driven events. Reddit provides moderation tools, mobile apps, and advertising products for brands and agencies. It’s known for its passionate niche communities and outsized influence on internet culture and trends.