About the role The Agents team trains advanced agentic language models that use reasoning and tool use to complete real tasks on a computer. This is a specialist role at the center of the loop that drives those models: the data we train on and the benchmarks we measure against.
You'll own the agentic data pipeline end-to-end - sourcing and generating high-quality trajectories, tool-use data, and RL environments - and the evaluation suite that tells us, rigorously and reproducibly, what our agents can actually do. These two halves are inseparable: benchmarks expose where models fail, and targeted data closes the gap. The agents are only as good as the data they learn from and the evals that keep us honest, and this role owns both.
This is a research scientist position for someone who wants depth in data and measurement rather than breadth across the whole stack. You should be the kind of person who reads through datasets line by line, distrusts a metric until it's been validated, and gets satisfaction from making an eval suite that nobody questions.
Key responsibilitiesBenchmarking & evaluation - Design and run evaluations of agentic capabilities - multi-step reasoning, tool use, long-horizon planning, computer use, and safety properties - turning ambiguous notions of "intelligence" into defensible, reproducible metrics.
- Build and harden evaluation harnesses so benchmarks run reliably at scale against training checkpoints, with clear signal on regressions and model health.
- Run experiments characterizing how prompting, sampling, scaffolding, and environment design affect agentic performance on internal and public benchmarks.
- Diagnose anomalous eval results mid-training-run - determine whether the cause is the model, the data, the harness, or the infrastructure - and communicate the answer clearly.
Agentic data - Source, generate, and curate high-quality agentic training data: trajectories, tool-use traces, and task datasets for new capabilities.
- Design and scale RL environments and reward signals, and measure their impact on model performance.
- Manage technical relationships with external data vendors and domain experts, evaluating data quality and iterating quickly on feedback.
- Develop QA frameworks that catch reward hacking, label noise, and contamination, keeping data and benchmark quality high.
Across both - Contribute to technical reports, research publications, and open-source benchmarks and tooling.
- Partner with research and product teams to translate capability goals into measurable data and evaluation artifacts.
QualificationsAcademic qualifications - BS, MS, or PhD (or equivalent experience) in Computer Science, Machine Learning, or a related field.
Minimum qualifications - 2+ years of experience with a clear emphasis on evaluations and/or training-data curation for ML systems (related areas: LLM training/fine-tuning, RL, or distributed ML systems).
- Strong Python and PyTorch development experience.
- Demonstrated experience designing and deep-diving into evaluations, or curating and generating training datasets - ideally both.
- Hands-on experience using LLM agents in your personal or professional work.
- A habit of reading through raw data and trajectories to understand them and spot issues, and an instinct to distrust a metric until it's validated.
Preferred qualifications - Experience with reinforcement learning, reward design, or RL environment construction for LLMs.
- Background in statistics and experimental design - a feel for signal-to-noise, statistical power, and contamination in evaluations.
- Experience with large-scale dataset sourcing, curation, and processing, including working with external vendors or domain experts.
- Strong knowledge of the literature on agent evaluation, RL, LLM reasoning, and tool use.
- Experience building or operating data pipelines and evaluation infrastructure reliable at scale (e.g., PyTorch, Ray).
- Experience evaluating or generating data for software-engineering or computer-use agents.
- Contributions to published research, public benchmarks, and/or open-source ML software.
Representative projects- Stand up a new agentic benchmark from scratch - define the task, build the dataset and scoring, validate against known signals, and ship a view that makes the result legible to researchers and leadership.
- Build an RL environment for a new high-value capability: design the reward, generate and QA the trajectory data, and measure the lift on model performance.
- Diagnose a mid-training regression: an eval suite returns anomalous numbers and you determine whether it's the model, the harness, the data, or the infrastructure.
- Partner with an external data vendor or domain expert to source high-quality trajectories, then build the QA framework that keeps reward hacking and contamination out.
- Take a flaky distributed eval pipeline and make it reliable - better retries, better observability, faster feedback to researchers.
$150,000 - $450,000 a year
Salary Range
The posted salary range represents the company's good faith estimate of the compensation for this position upon hire. The actual compensation offered may vary within this range depending on individual qualifications, including but not limited to relevant skills, experience, education, certifications, geographic location, and specific business needs.
We encourage you to apply even if you don't meet every qualification listed. Strong candidates rarely match every line, and we'd rather hear from you than have you rule yourself out.
