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[Remote] Member of Engineering (Pre-training / Data Research)

Remote, USA Full-time Posted 2026-06-16

Note: The job is a remote job and is open to candidates in USA. Poolside is a pioneering company focused on creating Artificial General Intelligence. The role involves working on the data team to enhance the quality of datasets for training models through data generation and optimization, collaborating with various teams to meet data needs.

Responsibilities

  • Follow the latest research related to LLMs and data quality in particular. Be familiar with the most relevant open-source datasets and models
  • Design and implement complex pipelines that can generate large amounts of data while maintaining high diversity and optimizing the resources available
  • Closely work with other teams such as Pretraining, Posttraining, Evals and Product to ensure short feedback loops on the quality of the models delivered
  • Suggest, conduct and analyze data ablations or training experiments that aim to improve the quality of the datasets generated via quantitative insights

Skills

  • Strong machine learning and engineering background
  • Experience with Large Language Models (LLM), including: Understanding of transformer architectures and how LLMs learn, Data ablations and scaling laws, Mid-training and Post-training techniques, Training reasoning and agentic models
  • Experience with evals tracking model capabilities (general knowledge, reasoning, math, coding, long-context, etc)
  • Experience in building trillion-scale pretraining datasets, and familiarity with concepts like data curation, deduplication, data mixing, tokenization, curriculum, impact of data repetition, etc
  • Excellent programming skills in Python
  • Strong prompt engineering skills
  • Experience working with large-scale GPU clusters and distributed data pipelines
  • Strong obsession with data quality
  • Research experience: Author of scientific papers on any of the topics: applied deep learning, LLMs, source code generation, etc. - is a nice to have
  • Can freely discuss the latest papers and descend to fine details
  • Is reasonably opinionated

Benefits

  • Fully remote work & flexible hours
  • 37 days/year of vacation & holidays
  • Health insurance allowance for you & dependents
  • Company-provided equipment
  • Well-being, always-be-learning & home office allowances
  • Frequent team get togethers
  • Diverse & inclusive people-first culture

Company Overview

  • Poolside is an artificial intelligence platform that offers foundation concepts and infrastructure to write software codes. It was founded in 2023, and is headquartered in San Francisco, California, USA, with a workforce of 51-200 employees. Its website is http://www.poolside.ai.
  • Company H1B Sponsorship

  • Poolside has a track record of offering H1B sponsorships, with 1 in 2025. Please note that this does not guarantee sponsorship for this specific role.
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