Research Scientist, Data

Periodic Labs; Montreal (administrative region); On-site; CAD 347,000 - 486,000; Full time

Job summary

Periodic Labs in Montreal, Canada, is seeking a scientist to own evaluation and data across the training stack, building datasets, environments, and pipelines for cutting-edge AI models.

You will collaborate with computational and experimental scientists to translate workflows into rigorous evals and benchmarks, delivering a tight feedback loop between use cases, model evaluation, and training data.

Qualifications

• Designed evaluations, benchmarks, or RL environments for language models, agents, or scientific AI systems.
• Built large-scale data pipelines for LLM pretraining, midtraining, post-training, or evaluation.
• Strong judgment about dataset quality, provenance, licensing, and contamination risks.
• Strong software and data engineering skills, including data processing at scale and dataset versioning.

Responsibilities

• Own the evaluation and data strategy across the training stack, identifying capability gaps and shaping the roadmap with leads of physical science and AI research.
• Translate advanced scientific workflows into rigorous evals, benchmarks, and RL environments.
• Source, evaluate, and procure external datasets across chemistry, physics, materials science, mathematics, simulations, and laboratory instrumentation.
• Build robust pipelines to ingest, clean, and transform for training large-scale datasets from heterogeneous sources.
• Create tooling and workflows for researchers to inspect data and diagnose failures.

Skills

Evaluation design

Data engineering

RL environments

Dataset versioning

Scientific AI

Software engineering

Education

Bachelor's degree

Job description

About Periodic Labs

The most important scientific discoveries of our time won’t happen in a traditional lab. We’re an AI and physical sciences company building state-of-the-art models to accelerate breakthroughs across materials, energy, and beyond. Backed by world-class investors and growing rapidly, we operate at the pace the frontier requires. Our team brings deep expertise, genuine ownership, and an insatiable drive to push the boundaries of what’s scientifically possible.

The most important scientific discoveries of our time won’t happen in a traditional lab. We’re an AI and physical sciences company building state-of-the-art models to accelerate breakthroughs across materials, energy, and beyond. Backed by world-class investors and growing rapidly, we operate at the pace the frontier requires. Our team brings deep expertise, genuine ownership, and an insatiable drive to push the boundaries of what’s scientifically possible.

About The Role

You will work on the most important aspect of Scientific AI creation: evaluations and data. This means constructing cutting-edge evaluations based on advanced scientific use cases, sourcing and procuring external datasets, integrating internally generated experimental data into the training stack, constructing training environments for RL. You’ll ensure that the team always has the right assets, in the right shape, to evaluate and improve AI models.

You will work with computational and experimental scientists to translate complex scientific workflows into rigorous evaluations and agentic benchmarks, and partner with pretraining, midtraining, and reinforcement learning researchers to identify the data models needed, then build the datasets, environments, and pipelines to deliver it. Your goal will be to create a tight feedback loop between scientific use cases, model evaluation, and training data.

What You’ll Do

• Own the evaluation and data strategy across the training stack, identifying capability gaps and shaping the roadmap with leads of physical science and AI research
• Work with domain experts to translate advanced scientific workflows into rigorous evals, benchmarks, and RL environments
• Source, evaluate, and procure external datasets across chemistry, physics, materials science, mathematics, simulations, and laboratory instrumentation
• Build robust pipelines to ingest, clean, and transform for training large-scale datasets from heterogeneous sources
• Build tooling and analysis workflows that help researchers inspect data, understand model failures, and determine which evaluations or datasets to develop next

You Will Thrive in This Role If You Have

• Designed evaluations, benchmarks, or RL environments for language models, agents, or scientific AI systems
• Built large-scale data pipelines for LLM pretraining, midtraining, post-training, or evaluation
• Strong judgment about dataset and evaluation quality, including scientific relevance, coverage, provenance, licensing, and contamination risks
• Strong software and data engineering skills, including familiarity with data processing at scale, dataset versioning, lineage tracking
• A research-oriented mindset: you form hypotheses about data, run controlled experiments, measure model outcomes, and iterate with rigor
• Research experience in areas such as materials science, solid state chemistry, chemistry, computational physics, semiconductors

Mechanics

• Minimum education: Bachelor's degree or similar experience
• Location: Menlo Park, CA or Montreal, Canada. (Soon: San Francisco, too)
• Compensation: $250,000-350,000 + equity
• Visa sponsorship: Yes, we sponsor visas.