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About the role
As a Research Scientist, you will conduct deep, original research that advances how the world understands, evaluates, and routes large language models. You'll work with one of the richest datasets in AI: billions of LLM generations spanning every major model, provider, and use case.
What they're looking for
- MS or PhD in a quantitative field (machine learning, statistics, computer science, mathematics, computational linguistics, or similar)
- Track record of original research, demonstrated by first-author publications, significant open-source contributions, or equivalent impact in industry research
- Deep expertise in statistics, experimental design, and causal inference. You can design rigorous studies and reason carefully about validity, bias, and generalizability
- Strong programming skills in Python. You can build data pipelines, run large-scale experiments, and prototype models efficiently
- Proficiency in SQL for working with large-scale analytical databases (ClickHouse, BigQuery, or similar)
- Hands-on experience with modern ML/NLP techniques such as LLM evaluation, fine-tuning, embeddings, classification, or reinforcement learning from human feedback
More about this role
OpenRouter is the leading AI routing and infrastructure layer that developers and enterprises use to access, manage, and optimize the best large language models across providers without lock-in, capacity constraints, or unnecessary cost. We power the most advanced AI teams in the world by giving them the flexibility to move fast, scale confidently, and stay future-proof as models evolve.
As enterprise adoption of AI accelerates, OpenRouter sits at the center of how organizations operationalize LLMs across research, product, and production workloads.
As a Research Scientist, you will conduct deep, original research that advances how the world understands, evaluates, and routes large language models. You'll work with one of the richest datasets in AI: billions of LLM generations spanning every major model, provider, and use case.
You will own and pursue a research agenda: designing experiments, developing evaluation frameworks, and producing work that shapes how models are compared, selected, and deployed. Your findings will inform OpenRouter's routing intelligence, public rankings, and the broader AI discourse.
Success in this role is measured by the quality and impact of your...
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