{"schema_version":"onlylabs.public_signal.v1","title":"Anthropic Job: Research Engineer, Machine Learning (Reinforcement Learning)","description":"Anthropic job signal with public source context, captured evidence pages, related signals, and data-business radar classification.","url":"https://onlylabs.fyi/signals/b3703b80-9a71-4dd0-94b6-4bc88c22da97","json_url":"https://onlylabs.fyi/signals/b3703b80-9a71-4dd0-94b6-4bc88c22da97/signal.json","generated_at":"2026-06-11T03:54:56.405438+00:00","org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab","category_label":"Frontier lab","dossier_url":"https://onlylabs.fyi/labs/anthropic","dossier_json_url":"https://onlylabs.fyi/labs/anthropic/dossier.json"},"related_urls":{"signal":"https://onlylabs.fyi/signals/b3703b80-9a71-4dd0-94b6-4bc88c22da97","signal_json":"https://onlylabs.fyi/signals/b3703b80-9a71-4dd0-94b6-4bc88c22da97/signal.json","source":"https://job-boards.greenhouse.io/anthropic/jobs/5115935008","lab_dossier":"https://onlylabs.fyi/labs/anthropic","lab_dossier_json":"https://onlylabs.fyi/labs/anthropic/dossier.json","analysis":"https://onlylabs.fyi/analysis/anthropic","analysis_json":"https://onlylabs.fyi/analysis/anthropic/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/anthropic/evidence.json","category":"https://onlylabs.fyi/frontier","category_json":"https://onlylabs.fyi/frontier.json","category_feed":"https://onlylabs.fyi/frontier/feed.xml","category_signals_json":"https://onlylabs.fyi/signals.json","topic":"https://onlylabs.fyi/topics/hiring","topic_signals_json":"https://onlylabs.fyi/topics/hiring/signals.json","topic_feed":"https://onlylabs.fyi/topics/hiring/feed.xml","data_business":null},"answer_pack":{"answer":"Anthropic opened Research Engineer, Machine Learning (Reinforcement Learning) (London, UK). This hiring signal is demand evidence for teams, locations, and technical bets being staffed. High-signal details: location London, UK · Routine job opening at Anthropic.. onlylabs links this event to 1 captured evidence page and 6 related job signals.","signal_desk":"hiring","source_context":{"source_url":"https://job-boards.greenhouse.io/anthropic/jobs/5115935008","source_host":"job-boards.greenhouse.io","occurred_at":"2026-04-03T16:07:49+00:00","first_seen_at":"2026-06-05T05:42:57.438244+00:00","date_source":"source","context":"London, UK"},"context_markers":[{"label":"Lab","value":"Anthropic","source":"signal"},{"label":"Signal desk","value":"hiring","source":"signal"},{"label":"Source host","value":"job-boards.greenhouse.io","source":"source"},{"label":"Location","value":"London, UK","source":"signal"},{"label":"ATS","value":"greenhouse","source":"source"},{"label":"Notability","value":"Routine job opening at Anthropic.","source":"signal"},{"label":"Watch term","value":"RL environments","source":"evidence"},{"label":"Watch term","value":"Eval methodology","source":"evidence"},{"label":"Watch term","value":"Infrastructure","source":"evidence"},{"label":"Watch term","value":"Safety and alignment","source":"evidence"},{"label":"Watch term","value":"Agents and tool use","source":"evidence"}],"evidence_coverage":{"target_pages":1,"captured_pages":1,"readable_pages":1,"capture_methods":["plain"],"missing_page_urls":[],"failed_page_urls":[],"blocked_page_urls":[],"page_urls":["https://job-boards.greenhouse.io/anthropic/jobs/5115935008"],"related_signals":6,"has_source_url":true,"latest_page_fetched_at":"2026-06-11T03:54:56.405438+00:00"},"data_business":{"matches":false,"lanes":[],"matched_terms":[],"score":null,"reason":null},"agent_handoff":{"signal_json":"https://onlylabs.fyi/signals/b3703b80-9a71-4dd0-94b6-4bc88c22da97/signal.json","dossier_json":"https://onlylabs.fyi/labs/anthropic/dossier.json","analysis_json":"https://onlylabs.fyi/analysis/anthropic/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/anthropic/evidence.json","topic_signals_json":"https://onlylabs.fyi/topics/hiring/signals.json","topic_feed":"https://onlylabs.fyi/topics/hiring/feed.xml","category_signals_json":"https://onlylabs.fyi/signals.json","data_radar_json":null,"opportunities_json":null},"analysis_playbook":{"objective":"Turn open roles into leading indicators for teams, locations, infrastructure needs, eval work, data demand, and commercialization buildout.","evidence_focus":["role title","team or function","location","job description","data, eval, infra, safety, product, and GTM terms"],"extraction_questions":["Which teams are hiring repeatedly?","Which locations or hubs are becoming more important?","Which roles imply data, evaluation, infrastructure, or platform spend?","Which labs have hiring signals without a fresh standing analysis?"],"signal_questions":["What demand signal does this role create for teams, locations, infrastructure, evals, or data workflows?","Which teams are hiring repeatedly?","Which locations or hubs are becoming more important?","Do the 6 related job signals show a repeated pattern?"],"output_fields":["org","team","location","role_theme","data_business_lane","evidence_url"],"data_business_relevance":"Hiring is the earliest demand signal for where frontier labs may need data products, eval tooling, infra vendors, and workflow support.","required_sources":[{"label":"signal_json","url":"https://onlylabs.fyi/signals/b3703b80-9a71-4dd0-94b6-4bc88c22da97/signal.json","required":true},{"label":"source","url":"https://job-boards.greenhouse.io/anthropic/jobs/5115935008","required":true},{"label":"dossier_json","url":"https://onlylabs.fyi/labs/anthropic/dossier.json","required":true},{"label":"analysis_evidence_json","url":"https://onlylabs.fyi/analysis/anthropic/evidence.json","required":true},{"label":"topic_signals_json","url":"https://onlylabs.fyi/topics/hiring/signals.json","required":false},{"label":"data_radar_json","url":null,"required":false}],"expected_output":["one-paragraph source-grounded interpretation","category-specific implication","confidence and missing evidence","recommended next source to inspect"],"prompt_seed":"Using only the linked onlylabs JSON, captured source context, and cited evidence, analyze Anthropic's job signal \"Research Engineer, Machine Learning (Reinforcement Learning)\" for frontier lab strategy."},"semantic_triples":[{"subject":"Anthropic","predicate":"opened","object":"role Research Engineer, Machine Learning (Reinforcement Learning)","text":"Anthropic opened role Research Engineer, Machine Learning (Reinforcement Learning)."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"is classified as","object":"job signal","text":"Research Engineer, Machine Learning (Reinforcement Learning) is classified as job signal."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"belongs to","object":"hiring desk","text":"Research Engineer, Machine Learning (Reinforcement Learning) belongs to hiring desk."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has context","object":"London, UK","text":"Research Engineer, Machine Learning (Reinforcement Learning) has context London, UK."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has evidence coverage","object":"1 captured evidence page","text":"Research Engineer, Machine Learning (Reinforcement Learning) has evidence coverage 1 captured evidence page."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has captured page count","object":"1","text":"Research Engineer, Machine Learning (Reinforcement Learning) has captured page count 1."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has readable page count","object":"1","text":"Research Engineer, Machine Learning (Reinforcement Learning) has readable page count 1."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has related signal count","object":"6","text":"Research Engineer, Machine Learning (Reinforcement Learning) has related signal count 6."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has analysis playbook objective","object":"Turn open roles into leading indicators for teams, locations, infrastructure needs, eval work, data demand, and commercialization buildout.","text":"Research Engineer, Machine Learning (Reinforcement Learning) has analysis playbook objective Turn open roles into leading indicators for teams, locations, infrastructure needs, eval work, data demand, and commercialization buildout.."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has source host","object":"job-boards.greenhouse.io","text":"Research Engineer, Machine Learning (Reinforcement Learning) has source host job-boards.greenhouse.io."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has lab","object":"Anthropic","text":"Research Engineer, Machine Learning (Reinforcement Learning) has lab Anthropic."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has signal desk","object":"hiring","text":"Research Engineer, Machine Learning (Reinforcement Learning) has signal desk hiring."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has source host","object":"job-boards.greenhouse.io","text":"Research Engineer, Machine Learning (Reinforcement Learning) has source host job-boards.greenhouse.io."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has location","object":"London, UK","text":"Research Engineer, Machine Learning (Reinforcement Learning) has location London, UK."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has ats","object":"greenhouse","text":"Research Engineer, Machine Learning (Reinforcement Learning) has ats greenhouse."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has notability","object":"Routine job opening at Anthropic.","text":"Research Engineer, Machine Learning (Reinforcement Learning) has notability Routine job opening at Anthropic.."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has watch term","object":"RL environments","text":"Research Engineer, Machine Learning (Reinforcement Learning) has watch term RL environments."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has watch term","object":"Eval methodology","text":"Research Engineer, Machine Learning (Reinforcement Learning) has watch term Eval methodology."}]},"intelligence":{"signal_desk":"hiring","answer":"Anthropic opened Research Engineer, Machine Learning (Reinforcement Learning) (London, UK). This hiring signal is demand evidence for teams, locations, and technical bets being staffed. High-signal details: location London, UK · Routine job opening at Anthropic.. onlylabs links this event to 1 captured evidence page and 6 related job signals.","semantic_triples":[{"subject":"Anthropic","predicate":"opened","object":"role Research Engineer, Machine Learning (Reinforcement Learning)","text":"Anthropic opened role Research Engineer, Machine Learning (Reinforcement Learning)."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"is classified as","object":"job signal","text":"Research Engineer, Machine Learning (Reinforcement Learning) is classified as job signal."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"belongs to","object":"hiring desk","text":"Research Engineer, Machine Learning (Reinforcement Learning) belongs to hiring desk."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has context","object":"London, UK","text":"Research Engineer, Machine Learning (Reinforcement Learning) has context London, UK."},{"subject":"Research Engineer, Machine Learning (Reinforcement Learning)","predicate":"has evidence coverage","object":"1 captured evidence page","text":"Research Engineer, Machine Learning (Reinforcement Learning) has evidence coverage 1 captured evidence page."}]},"signal":{"id":"b3703b80-9a71-4dd0-94b6-4bc88c22da97","url":"https://onlylabs.fyi/signals/b3703b80-9a71-4dd0-94b6-4bc88c22da97","json_url":"https://onlylabs.fyi/signals/b3703b80-9a71-4dd0-94b6-4bc88c22da97/signal.json","source_url":"https://job-boards.greenhouse.io/anthropic/jobs/5115935008","title":"Research Engineer, Machine Learning (Reinforcement Learning)","summary":"Anthropic opened a hiring signal. onlylabs watches roles as demand indicators for teams, locations, and technical bets.","context":"London, UK","kind":{"key":"job_opened","label":"Job"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-04-03T16:07:49+00:00","first_seen_at":"2026-06-05T05:42:57.438244+00:00","date_source":"source","evidence_coverage":{"target_pages":1,"captured_pages":1,"readable_pages":1,"capture_methods":["plain"],"missing_page_urls":[],"failed_page_urls":[],"blocked_page_urls":[],"page_urls":["https://job-boards.greenhouse.io/anthropic/jobs/5115935008"]},"facets":{"location":"London, UK","ats":"greenhouse"},"traction":{"github_stars":null,"hn_points":null,"hn_comments":null,"hn_story_id":null,"hf_downloads":null,"hf_likes":null},"data_radar":null},"primary_evidence_page":{"url":"https://job-boards.greenhouse.io/anthropic/jobs/5115935008","final_url":"https://job-boards.greenhouse.io/anthropic/jobs/5115935008","title":"Research Engineer, Machine Learning (Reinforcement Learning)","http_status":200,"content_type":"text/html; charset=utf-8","capture_method":"plain","fetched_at":"2026-06-11T03:54:56.405438+00:00","bytes":74704,"raw_path":"6cb9de182ad0f14cf7497fc2befa7afa0dfb7b061aa8b71a835e5ad33ee72ce7.html","content_hash":"b7cf1f1e15110ed83078bba4a798d4205e25e5349602b06d0e839e73fa80362d","excerpt_chars":1200,"truncated":true,"excerpt":"Job Application for Research Engineer, Machine Learning (Reinforcement Learning) at Anthropic Back to jobs Research Engineer, Machine Learning (Reinforcement Learning) London, UK Apply 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 teams Our Reinforcement Learning teams lead Anthropic's reinforcement learning research and development, playing a critical role in advancing our AI systems. We've contributed to all Claude models, with significant impacts on the autonomy and coding capabilities of Claude Sonnet 4.5 and Opus 4.5. Our work spans several key areas: Developing systems that enable models to use computers effectively Advancing code generation through reinforcement learning Pioneering fundamental RL research for large language models Building scalable RL infrastructure and training methodologies Enhancing model reasoning capabilities We collaborate closely with Anthropic's..."},"evidence_pages":[{"url":"https://job-boards.greenhouse.io/anthropic/jobs/5115935008","final_url":"https://job-boards.greenhouse.io/anthropic/jobs/5115935008","title":"Research Engineer, Machine Learning (Reinforcement Learning)","http_status":200,"content_type":"text/html; charset=utf-8","capture_method":"plain","fetched_at":"2026-06-11T03:54:56.405438+00:00","bytes":74704,"raw_path":"6cb9de182ad0f14cf7497fc2befa7afa0dfb7b061aa8b71a835e5ad33ee72ce7.html","content_hash":"b7cf1f1e15110ed83078bba4a798d4205e25e5349602b06d0e839e73fa80362d","excerpt_chars":1200,"truncated":true,"excerpt":"Job Application for Research Engineer, Machine Learning (Reinforcement Learning) at Anthropic Back to jobs Research Engineer, Machine Learning (Reinforcement Learning) London, UK Apply 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 teams Our Reinforcement Learning teams lead Anthropic's reinforcement learning research and development, playing a critical role in advancing our AI systems. We've contributed to all Claude models, with significant impacts on the autonomy and coding capabilities of Claude Sonnet 4.5 and Opus 4.5. Our work spans several key areas: Developing systems that enable models to use computers effectively Advancing code generation through reinforcement learning Pioneering fundamental RL research for large language models Building scalable RL infrastructure and training methodologies Enhancing model reasoning capabilities We collaborate closely with Anthropic's..."}],"related_signals":[{"id":"7545b64a-3699-4461-aa7b-591f0ff8399b","url":"https://onlylabs.fyi/signals/7545b64a-3699-4461-aa7b-591f0ff8399b","source_url":"https://job-boards.greenhouse.io/anthropic/jobs/5186852008","title":"Product Support Specialist (Singapore)","context":"Singapore","kind":{"key":"job_opened","label":"Job"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-06-11T05:01:19+00:00","first_seen_at":"2026-06-05T05:42:57.438244+00:00","date_source":"greenhouse.updated_at"},{"id":"46fed67d-fb9e-4ec4-8fa5-e065cb534ade","url":"https://onlylabs.fyi/signals/46fed67d-fb9e-4ec4-8fa5-e065cb534ade","source_url":"https://job-boards.greenhouse.io/anthropic/jobs/5186965008","title":"Product Support Specialist (Singapore - Weekend Coverage)","context":"Singapore","kind":{"key":"job_opened","label":"Job"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-06-11T05:01:17+00:00","first_seen_at":"2026-06-05T05:42:57.438244+00:00","date_source":"greenhouse.updated_at"},{"id":"22609fbe-e554-4224-8abb-7130c97381bf","url":"https://onlylabs.fyi/signals/22609fbe-e554-4224-8abb-7130c97381bf","source_url":"https://job-boards.greenhouse.io/anthropic/jobs/4979585008","title":"Product Support Specialist","context":"Boston, MA; San Francisco, CA | New York City, NY | Seattle, WA; Washington, DC","kind":{"key":"job_opened","label":"Job"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-06-11T04:56:33+00:00","first_seen_at":"2026-06-05T05:42:57.438244+00:00","date_source":"greenhouse.updated_at"},{"id":"703f4263-e360-4fec-ae39-d05490a48eca","url":"https://onlylabs.fyi/signals/703f4263-e360-4fec-ae39-d05490a48eca","source_url":"https://job-boards.greenhouse.io/anthropic/jobs/5253274008","title":"Enterprise Threat Intelligence Lead, Global Safety, Intelligence & Security ","context":"San Francisco, CA | Seattle, WA | New York City, NY | Washington, DC","kind":{"key":"job_opened","label":"Job"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-06-11T00:38:05+00:00","first_seen_at":"2026-06-11T07:01:03.928848+00:00","date_source":"greenhouse.updated_at"},{"id":"7828ae51-3421-41fd-961f-9e4cd74e828c","url":"https://onlylabs.fyi/signals/7828ae51-3421-41fd-961f-9e4cd74e828c","source_url":"https://job-boards.greenhouse.io/anthropic/jobs/5119468008","title":"Staff Software Engineer, People Products","context":"Remote-Friendly (Travel Required) | San Francisco, CA","kind":{"key":"job_opened","label":"Job"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-06-11T00:21:00+00:00","first_seen_at":"2026-06-05T05:42:57.438244+00:00","date_source":"greenhouse.updated_at"},{"id":"e42bec4f-48c2-47da-b1ac-84d97f97f0f5","url":"https://onlylabs.fyi/signals/e42bec4f-48c2-47da-b1ac-84d97f97f0f5","source_url":"https://job-boards.greenhouse.io/anthropic/jobs/5194529008","title":"Marketing Events Lead, Brand","context":"San Francisco, CA | New York City, NY","kind":{"key":"job_opened","label":"Job"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-06-11T00:15:44+00:00","first_seen_at":"2026-06-05T05:42:57.438244+00:00","date_source":"greenhouse.updated_at"}]}