Staff+ Research Engineer, RL Data Platform

Anthropics 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.

Anthropics RL Data Platform team builds the systems that produce move and serve the human data Claude learns from: the interfaces humans use to give feedback the pipelines that turn raw feedback into training signal and the tooling researchers use to launch monitor and inspect data collection. Every RL run depends on a steady supply of high-quality data - human feedback expert demonstrations graded transcripts - and when a researcher has an idea for new data on Monday our job is to make it collectable by Wednesday and in the training mix by Friday.

This is a full-stack ownership-heavy role on a small senior team. Youll design and ship web interfaces used by thousands of expert annotators build the backend services and data pipelines behind them and work directly with RL researchers to understand what data they need and why. Youll scope your own projects make architectural calls and see them through to production. Were looking for engineers who treat researchers as their users build for reliability first and care as much about the shape of the data leaving the system as the UI going into it.

• Design build and operate the feedback and data collection interfaces used by human annotators domain experts and internal researchers.

• Build and maintain the backend services APIs and pipelines that route model samples to humans and return structured feedback to training.

• Own the reliability latency and usability of systems that run continuously against live model endpoints.

• Partner with RL researchers to translate loosely specified data needs into well-scoped collection campaigns and the tooling to run them.

• Build dashboards monitoring and inspection tools so researchers can see data quality and throughput without asking an engineer.

• Identify and remove the bottlenecks between we want this data and its in the training mix.

• Strong full-stack engineering skills with production experience in TypeScript/React on the frontend and Python on the backend.

• Experience designing and operating backend services and data pipelines that other teams depend on.

• A track record of owning projects end-to-end from an ambiguous brief to something in production that people use.

• Comfort working directly with technical stakeholders whose needs change week to week and the judgment to push back when something isnt worth building.

• Effective use of AI tools in your own day-to-day work.

• Care about the societal impacts of your work.

• Experience building annotation labelling evaluation or other human-in-the-loop data tooling.

• Experience with RLHF preference data or other human-feedback pipelines for ML systems.

• Experience shipping researcher-facing or other expert-facing internal tools people love: interviewing users hunting down friction measurably improving the experience.

• Experience running experiments on data collection interfaces and using the results to improve data quality.

• Experience working with crowdworker or expert vendor platforms at scale.

• Familiarity with how LLMs are trained and evaluated.

• Build an interface that lets a domain expert review a long agentic transcript flag the step where things went wrong and write a corrected continuation - with the result landing in a training-ready format.

• Rework the sampling path between our feedback interfaces and model endpoints to cut time-to-first-sample for annotators.

• Build a campaign launcher that lets a researcher stand up a new data collection effort (task rubric population quality checks) without writing code.

• Instrument annotator behaviour to detect low-effort or adversarial work and surface it to the quality team automatically.

• Design the data model for a kind of feedback we havent collected before and ship the pipeline that gets it into the training mix.

Minimum education: Bachelors 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 arent 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 youre interested in this work. We think AI systems like the ones were 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 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 youre ever unsure about a communication dont click any linksvisit for confirmed position openings.

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. Were 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.

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 aboutour policy for using AI in our application process.