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Research Scientist, Scaling RL

periodic-labsMenlo Park, CA; Montreal, CanadaEngineering
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Salary
$225K-$350K
Job type
Full-time
Experience
Mid
Posted
1 Oct 2026
Status
Open · checked 7d ago

About this role

Research Scientist, Scaling RL is an opening located in Menlo Park, California or Montreal, Canada, designed for a professional focused on scaling reinforcement learning for frontier models. This position fits candidates experienced in training large language models using reinforcement learning who want to advance scientific knowledge and reasoning tasks.

Role Overview

Periodic Labs seeks a Research Scientist, Scaling RL to join the team in Menlo Park, CA or Montreal, Canada. The position centers on training frontier models to develop deep scientific knowledge and reasoning capabilities. The professional in this role will investigate how reinforcement learning scales alongside training compute, create improved algorithms, and transition experimental concepts into large-scale runs.

Key Responsibilities

Formulate experiments to analyze scaling performance relative to compute, model size, data quality, and reward quality.
Create improved reinforcement learning algorithms covering policy optimization, advantage estimation, exploration, and credit assignment for long-horizon tasks.
Construct adaptive sampling and curriculum methods to modify task difficulty, problem selection, and rollout volume as model performance increases.
Analyze bias and stability during training by applying importance-sampling corrections and addressing policy staleness and training-inference mismatch.
Enhance compute efficiency across training and inference stages through hyperparameter testing regarding length penalties, rollout counts, batch sizes, and update schedules.

Requirements

Practical background in training large language models utilizing reinforcement learning.
High attention to detail combined with a methodical approach to answering questions scientifically.
Capability to design small-scale reinforcement learning environments that scale successfully to large training runs.
Ability to navigate a complex training stack to implement, debug, and test novel research concepts.

Skills and Tools

Reinforcement learning algorithms
Policy optimization
Advantage estimation
Exploration methods
Credit assignment
Adaptive sampling
Curriculum methods
Importance-sampling corrections
Hyperparameter optimization

Salary and Benefits

Base compensation ranging from $225,000 to $350,000
Equity options
Visa sponsorship and assistance provided

About the Company

Periodic Labs operates as an artificial intelligence and physical sciences organization focused on constructing models to speed up breakthroughs in materials, energy, and related fields. Supported by investors, the organization expands rapidly and maintains a team possessing technical expertise and ownership.

How to Apply

Interested candidates should apply directly on the official company careers page.

Skills and tech stack

Questions candidates ask

Where is the Research Scientist, Scaling RL position located?

The role is based in Menlo Park, CA or Montreal, Canada.

What is the salary range for this job?

The base compensation is between $225,000 and $350,000, plus equity.

Is visa sponsorship available?

Yes, visa sponsorship is provided with assistance offered throughout the process.

What minimum education is required?

A Bachelor's degree or similar experience is required.

What is the primary focus of the work?

The work involves training frontier models for scientific knowledge and reasoning, studying reinforcement learning scaling with compute, and developing improved algorithms.

Ready to apply?

The application is on the official periodic-labs careers page.

Apply on company site