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Anthropic · San Francisco/New York City/Seattle · Hybrid

Research Engineer / Research Scientist, Tokens

10/11/2025

Description

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. 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!

Qualifications

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

Nice to have

High performance, large-scale ML systems
GPUs, Kubernetes, Pytorch, or OS internals
Language modeling with transformers
Reinforcement learning
Large-scale ETL

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