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. ANTHROPIC FELLOWS PROGRAM OVERVIEW The Anthropic Fellows Program is designed to foster AI research and engineering talent. We provide funding and mentorship to promising technical talent - regardless of previous experience. Fellows will primarily use external infrastructure (e.g. open-source models, public APIs) to work on an empirical project aligned with our research priorities, with the goal of producing a public output (e.g. a paper submission). In one of our earlier cohorts, over 80% of fellows produced papers. We run multiple cohorts of Fellows each year and review applications on a rolling basis. Apply at the bottom of this page. We are accepting applications on a rolling basis for the next cohort expected to start in January 2027. In some circumstances, we can accommodate fellows starting outside the usual cohort timelines — please note in your application if the January 2027 start date doesn't work for you. WHAT TO EXPECT * 4 months of full-time research * Direct mentorship from Anthropic researchers * Access to a shared workspace * Connection to the broader AI safety and security research community * Weekly stipend of 3,850 USD / 2,310 GBP / 4,300 CAD + benefits (these vary by country) * Funding for compute (~$15k/month) and other research expenses INTERVIEW PROCESS The interview process will include an initial application & reference check, technical assessments & interviews, and a research discussion. 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. COMPENSATION The expected base stipend for this role is 3,850 USD / 2,310 GBP / 4,300 CAD per week, with an expectation of 40 hours per week for 4 months (with possible extension). ML SYSTEMS & PERFORMANCE FELLOWS MENTORS, RESEARCH AREAS, & PAST PROJECTS Fellows will undergo a project selection & mentor matching process. Potential mentors include: * Alwin Peng * Zygi Straznickas Note: You may research mentors' prior work, but all applications must go through the official form, not the mentors. For a past example of an engineering-heavy project, see: * AI agents find $4.6M in blockchain smart contract exploits Projects in this workstream may include: * Building a CPU simulator for accelerator workloads * Adding backends for different accelerators on an open source project * Building on demand infrastructure for other infrastructure heavy fellows projects * Building complex synthetic data or environment pipelines UNIQUE CANDIDATE CRITERIA You might be a particularly great fit for this workstream if you: * Have strong software engineering skills with experience building complex ML systems * Can balance research exploration with engineering rigor and operational reliability * Enjoy collaborating across research and engineering disciplines * Are comfortable working with large-scale distributed systems and high-performance computing (e.g. in trading) * Have experience with training, fine-tuning, or evaluating large language models * Are adept at analyzing and debugging model training processes YOU MAY BE A GOOD FIT IF YOU * Are motivated by making sure AI is safe and beneficial for society as a whole * Are excited to transition into empirical AI research and would be interested in a full-time role at Anthropic * Have a strong technical background in computer science, mathematics, or physics * Thrive in fast-paced, collaborative environments * Can implement ideas quickly and communicate clearly CANDIDATES MUST BE * Fluent in Python programming * Available to work full-time on the Fellows program REINFORCEMENT LEARNING FELLOWS MENTORS, RESEARCH AREAS, & PAST PROJECTS Fellows will undergo a project selection & mentor matching process. Potential research areas and mentors include: * Ruhua Jiang * Kaidi Cao * Sunny Duan * David Brandfonbrener * Colt Steele * Dino Distefano * Will Williams Projects in this workstream may include: * Building model-based tools to better understand AI training data and improve training data quality * A research project to better understand generalization * Creating RL environments to improve Claude models at capabilities that are within your domain of expertise * Building RL environments for safety-related tasks * Conducting research and implementing solutions in areas such as RL algorithms UNIQUE CANDIDATE CRITERIA You might be a particularly great fit for this workstream if you: * Have strong software engineering skills with experience building complex ML systems * Can balance research exploration with engineering rigor and operational reliability * Enjoy collaborating across research and engineering disciplines * Are comfortable working with large-scale distributed systems and high-performance computing * Have experience with training, fine-tuning, or evaluating large language models * Are adept at analyzing and debugging model training processes LOGISTICS Logistics Requirements: To participate in the Fellows program, you must have work authorization in the US, UK, or Canada and be located in that country during the program. Workspace Locations: We have designated shared workspaces in SF. We are also open to remote fellows in the UK, US, or Canada. Visa Sponsorship: We are not currently able to sponsor visas for fellows. To participate in the Fellows program, you need to have or independently obtain full-time work authorization in the UK, the US, or Canada. Program Duration: The program runs for 4 months, full-time. If you can't commit to the full duration, please still apply and note your constraints in the application. We review these requests on a case-by-case basis. Please note: We do not guarantee that we will make any full-time offers to fellows. However, strong performance during the program may indicate that a Fellow would be a good fit for full-time roles at Anthropic. In previous cohorts, 25-50% of fellows received a full-time offer, and we’ve supported many more to go on to do great work on AI safety and security at other organizations. The below are Anthropic's policies for full time roles. These do NOT apply to the Fellows Program. 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 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 @anthropic.com 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 anthropic.com/careers 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 efforts in computer science. We're an extremely collaborative group, and we host frequent research discussions to ensure that we are pursuing the highest-impact work at any given time. As such, we greatly value communication skills. The easiest way to understand our research directions is to read our recent research. This research continues many of the directions our team worked on prior to Anthropic, including: GPT-3, Circuit-Based Interpretability, Multimodal Neurons, Scaling Laws, AI & Compute, Concrete Problems in AI Safety, and Learning from Human Preferences. COME WORK WITH US! Anthropic is a public benefit corporation headquartered in San Francisco. We offer competitive compensation and benefits, optional equity donation matching, generous vacation and parental leave, flexible working hours, and a lovely office space in which to collaborate with colleagues. Guidance on Candidates' AI Usage: Learn about our policy for using AI in our application process.

Anthropic Fellows Program, ML Systems & Reinforcement Learning

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