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Software Engineer, RL Data

Anthropic

london, england, United-Kingdom Full-time June 20, 2026

Found Description

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.

About the role

This is a senior, foundational role on a new team: you'll make architecture decisions the rest of the team builds on, and help shape what we build first. The work is hands‑on and varied. Some weeks you'll be deep in pipeline or infrastructure engineering; others you'll be tuning prompts until the output is good, or sitting with a research team that depends on your systems and shipping the fixes they need. We’re looking for experienced engineers who own outcomes end‑to‑end — down to reading transcripts, supporting users, and wrangling vendors.

Anthropic’s RL Data team builds the systems that produce...

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