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Research Engineer / Research Scientist, Tokens

San Francisco, CA💼 Full-time💰 $350,000–$350,000🗓 2026-04-01 → 2026-07-31

Core

Building large-scale ML systems from the ground up, focusing on reliability, throughput, efficiency, and scientific experiments for safe, steerable AI.

Role type

Research Engineer (ML Infrastructure)

Builds

Large-scale ML clusters, distributed training jobs, and dev tooling for language models.

Domain

Artificial Intelligence / Machine Learning Infrastructure

Deliverable

production ML models

Required skills

Software engineering, high-performance computing, distributed systems, PyTorch, Kubernetes, OS internals

Preferred skills

Language modeling with transformers, reinforcement learning, large-scale ETL

Technologies

PyTorch, Kubernetes, GPUs

Responsibilities

Making clusters reliable for big jobs, improving throughput and efficiency, running and designing scientific experiments, improving dev tooling, optimizing attention mechanisms, scaling distributed training jobs.

Seniority

Mid-to-Senior, hands-on IC

Rewrite
## About Anthropic Anthropic’s mission is to create reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial for our users and for society as a whole. Our team is a quickly growing group of committed researchers, engineers, policy experts, and business leaders working together to build beneficial AI systems. You want to build large scale ML systems from the ground up. You care about making safe, steerable, trustworthy systems. As a Research Engineer, you'll touch all parts of our code and infrastructure, whether that's making the cluster more reliable for our big jobs, improving throughput and efficiency, running and designing scientific experiments, or improving our dev tooling. You're excited to write code when you understand the research context and more broadly why it's important. Note: This is an "evergreen" role that we keep open on an ongoing basis. We receive many applications for this position, and you may not hear back from us directly if we do not currently have an open role on any of our teams that matches your skills and experience. We encourage you to apply despite this, as we are continually evaluating for top talent to join our team. You are also welcome to reapply as you gain more experience, but we suggest only reapplying once per year. We may also put up separate, team-specific [job postings](https://www.anthropic.com/jobs). In those cases, the teams will give preference to candidates who apply to the team-specific postings, so if you are interested in a specific team please make sure to check for team-specific job postings! ## You may be a good fit if you: - Have significant software engineering experience - Are results-oriented, with a bias towards flexibility and impact - Pick up slack, even if it goes outside your job description - Enjoy pair programming (we love to pair!) - Want to learn more about machine learning research - Care about the societal impacts of your work ## Strong candidates may also have experience with: - High performance, large-scale ML systems - GPUs, Kubernetes, Pytorch, or OS internals - Language modeling with transformers - Reinforcement learning - Large-scale ETL ## Representative projects: - Optimizing the throughput of a new attention mechanism - Comparing the compute efficiency of two Transformer variants - Making a Wikipedia dataset in a format models can easily consume - Scaling a distributed training job to thousands of GPUs - Writing a design doc for fault tolerance strategies - Creating an interactive visualization of attention between tokens in a language model ## Logistics Minimum education: Bachelor’s degree or an equivalent combination of education, training, and/or experience Required field of study: A field relevant to the role as demonstrated through coursework, training, or professional experience Minimum years of experience: Years of experience required will correlate with the internal job level requirements for the position Location-based hybrid policy: Currently, we expect all staff to be in one of our offices at least 25% of the time. However, some roles may require more time in our offices Visa sponsorship: We do sponsor visas! However, we aren't able to successfully sponsor visas for every role and every candidate. But if we make you an offer, we will make every reasonable effort to get you a visa, and we retain an immigration lawyer to help with this. We encourage you to apply even if you do not believe you meet every single qualification. Not all strong candidates will meet every single qualification as listed. Research shows that people who identify as being from underrepresented groups may not meet all qualifications but are still strong candidates.
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