Research Engineer, Team

Position: Research Engineer, Knowledge Team
# Research Engineer, Knowledge Team Department:
Research Job Type /

Location:

San Francisco Experience

Required:

3+ years

Posted On:
May 18, 2026

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.

We are looking for Research Engineers to help us redesign how Claude interacts with external data sources. Many of the paradigms for how data and knowledge bases are organized assume human consumers and constraints. This is no longer true in a world of LLMs! Your job will be to design new architectures for how information is organized, and train language models to optimally use those architectures.

Responsibilities:

Designing and implementing from scratch new information architecture strategies

Performing fine tuning and reinforcement learning to teach language models how to interact with new information architectures

Building "hard" knowledge base eval sets to help identify failure modes of how language models work with external data Designing and evaluating advanced agentic search capabilities.

You may be a good fit if you:

Are a very experienced Python programmer who can quickly produce reliable, high quality code that your teammates love using

Have good machine learning research experience

Have experience developing software that utilizes Large Language Models such as Claude 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 partner with world-class ML researchers to develop new LLM capabilities

Care about the societal impacts of your work

Have clear written and verbal communication

Strong candidates will also have experience with:

Collaborating with product teams to quickly prototype and deliver innovative solutions

Building complex agentic systems that utilize LLMsDeveloping scalable distributed information retrieval systems, such as search engines, knowledge graphs, RAG, indexing, ranking, query understanding, and distributed data processing

The annual compensation range for this role is listed below.

For sales roles, the range provided is the role's On Target Earnings ("OTE") range, meaning that the range includes both the sales commissions/sales bonuses target and annual base salary for the role.

Annual Salary:$350,000--$850,000 USDLogistics

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 are more prone to experiencing imposter syndrome and doubting the strength of their candidacy, so we urge you not to exclude yourself prematurely and to submit an application if you're interested in this work.

We think AI systems like the ones we're building have enormous social and ethical implications. We think this makes representation even more important, and we strive to include a range of diverse perspectives on our team.

Your safety matters to us. To protect yourself from potential scams, remember that Anthropic recruiters only contact you from  email addresses. In some cases, we may partner with vetted recruiting agencies who will identify themselves as working on behalf of Anthropic. Be cautious of emails from other domains. Legitimate Anthropic recruiters will never ask for money, fees, or banking information before your first day.

If you're ever unsure about a communication, don't click any links--visit  directly for confirmed position openings.

How we're different

We believe that the highest-impact AI research will be big science. At Anthropic we work as a single cohesive team on just a few large-scale research efforts. And we value impact -- advancing our long-term goals of steerable, trustworthy AI -- rather than work on smaller and more specific puzzles. We view AI research as an empirical science, which has as much in common with physics and biology as with traditional…