Research, Pre-Training Data

Thinking Machines Lab Inc.; San Francisco, Northern (CA, KY); Hybrid; USD 350,000 - 475,000; Full time

Benefits offered by this job

Health, dental, and vision benefits

Unlimited PTO

Paid parental leave

Relocation support

Job summary

Thinking Machines Lab Inc. in San Francisco calls for a pre-training researcher who blends research with data engineering to assemble the next generation of AI training datasets and data systems.

You will design methods for sourcing, curating, and analyzing data, and you will write production-grade code while collaborating across research and infrastructure teams to scale data processing and address privacy, safety, and licensing concerns.

Qualifications

• Proficiency in Python and a DL framework (PyTorch, TensorFlow, or JAX), with experience debugging distributed training.
• Bachelor’s degree or equivalent experience in CS, ML, Physics, Mathematics, or related discipline with strong theoretical and empirical grounding.
• Clarity in communication, the ability to explain complex technical concepts in writing.
• A strong grasp of probability, statistics, and ML fundamentals.
• Experience with curation, preprocessing, and analysis of large-scale text, code, or multimodal datasets.
• Prior experience in data engineering, dataset construction, or large-scale web data processing for ML models.
• Experience evaluating or improving training data quality and knowledge of data ethics, safety, and licensing for AI datasets.
• Contributions to open datasets, research publications, or data tooling.
• PhD in CS/ML/Physics/Math or equivalent industry research experience.

Responsibilities

• Design and implement techniques for curating, sourcing, and filtering large-scale text, code, and multimodal data.
• Develop data quality metrics and analysis to measure coverage, diversity, and representativeness across sources.
• Collaborate with research and infrastructure teams to scale data processing systems efficiently and reproducibly.
• Investigate and mitigate data risks, including privacy, safety, and licensing concerns, to ensure responsible and ethical data use.
• Continuously evaluate dataset improvements by analyzing their downstream effects on model learning and behavior.
• Publish and present research that moves the entire community forward. Share code, datasets, and insights that accelerate progress across industry and academia.

Skills

Python

DL frameworks

Communication

Probability and stats

Data curation

Data engineering

Data ethics & licensing

Open datasets/publications

PhD or equivalent experience

Education

Bachelor’s degree or equivalent

PhD in CS/ML/Physics/Math or equivalent

Job description

The mission of Thinking Machines is to build AI that extends human will and judgment.

About the Role

The role of pre-training researchers sits at the core of our roadmap. This work blends research with large-scale data engineering to help assemble the pre-training datasets and data systems that underpin the next generation of AI models. You’ll design and implement methods for sourcing, curating, and analyzing pre-training data for quality and performance.

You’ll work with automated pipelines and human-in-the-loop processes, contributing both scientific insight and production-grade code. It’s ideal for someone who enjoys working at the intersection of data, machine learning, and systems, and who’s excited by the challenge of shaping frontier AI.

This role blends fundamental research and practical engineering, as we do not distinguish between the two roles internally. You will be expected to write high-performance code and read technical reports. It’s an excellent fit for someone who enjoys both deep theoretical exploration and hands-on experimentation, and who wants to shape the foundations of how AI learns.

What You’ll Do

• Design and implement techniques for curating, sourcing, and filtering large-scale text, code, and multimodal data.

• Develop data quality metrics and analysis to measure coverage, diversity, and representativeness across sources.

• Collaborate with research and infrastructure teams to scale data processing systems efficiently and reproducibly.

• Investigate and mitigate data risks, including privacy, safety, and licensing concerns, to ensure responsible and ethical data use.

• Continuously evaluate dataset improvements by analyzing their downstream effects on model learning and behavior.

• Publish and present research that moves the entire community forward. Share code, datasets, and insights that accelerate progress across industry and academia.

Skills and Qualifications

Minimum qualifications:

• Proficiency in Python and familiarity with at least one deep learning framework (e.g., PyTorch, TensorFlow, or JAX). Comfortable with debugging distributed training and writing code that scales.

• Bachelor’s degree or equivalent experience in Computer Science, Machine Learning, Physics, Mathematics, or a related discipline with strong theoretical and empirical grounding.

• Clarity in communication, an ability to explain complex technical concepts in writing.

• A strong grasp of probability, statistics, and ML fundamentals. You can look at experimental data and distinguish between real effects, noise, and bugs.

• Experience with curation, preprocessing, and analysis of large-scale text, code, or multimodal datasets.

• Prior experience in data engineering, dataset construction, or large-scale web data processing for machine learning models.

• Experience evaluating or improving training data quality and knowledge of data ethics, safety, and licensing frameworks relevant to AI dataset creation.

• Contributions to open datasets, research publications, or data tooling.

• PhD in Computer Science, Machine Learning, Physics, Mathematics, or a related discipline with strong theoretical and empirical grounding; or, equivalent industry research experience.

Logistics

• Location: This role is based in San Francisco, California.

• Compensation: Depending on background, skills and experience, the expected annual salary range for this position is $350,000 - $475,000 USD.

• Visa sponsorship: We sponsor visas. While we can't guarantee success for every candidate or role, if you're the right fit, we're committed to working through the visa process together.

• Benefits: Thinking Machines offers generous health, dental, and vision benefits, unlimited PTO, paid parental leave, and relocation support as needed.