{"schema_version":"onlylabs.public_signal.v1","title":"xAI Job: Backend Engineer","description":"xAI job signal with public source context, captured evidence pages, related signals, and data-business radar classification.","url":"https://onlylabs.fyi/signals/cc8b7895-1048-4753-99b3-0ec145652a08","json_url":"https://onlylabs.fyi/signals/cc8b7895-1048-4753-99b3-0ec145652a08/signal.json","generated_at":"2026-06-11T02:32:22.44586+00:00","org":{"slug":"xai","name":"xAI","category":"frontier-lab","category_label":"Frontier lab","dossier_url":"https://onlylabs.fyi/labs/xai","dossier_json_url":"https://onlylabs.fyi/labs/xai/dossier.json"},"related_urls":{"signal":"https://onlylabs.fyi/signals/cc8b7895-1048-4753-99b3-0ec145652a08","signal_json":"https://onlylabs.fyi/signals/cc8b7895-1048-4753-99b3-0ec145652a08/signal.json","source":"https://job-boards.greenhouse.io/xai/jobs/4991448007","lab_dossier":"https://onlylabs.fyi/labs/xai","lab_dossier_json":"https://onlylabs.fyi/labs/xai/dossier.json","analysis":"https://onlylabs.fyi/analysis/xai","analysis_json":"https://onlylabs.fyi/analysis/xai/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/xai/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":"xAI opened Backend Engineer (London, UK). This hiring signal is demand evidence for teams, locations, and technical bets being staffed. 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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/cc8b7895-1048-4753-99b3-0ec145652a08/signal.json","required":true},{"label":"source","url":"https://job-boards.greenhouse.io/xai/jobs/4991448007","required":true},{"label":"dossier_json","url":"https://onlylabs.fyi/labs/xai/dossier.json","required":true},{"label":"analysis_evidence_json","url":"https://onlylabs.fyi/analysis/xai/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 xAI's job signal \"Backend Engineer\" for frontier lab 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This hiring signal is demand evidence for teams, locations, and technical bets being staffed. High-signal details: location London, UK · Routine job posting at xAI. onlylabs links this event to 1 captured evidence page and 6 related job signals.","semantic_triples":[{"subject":"xAI","predicate":"opened","object":"role Backend Engineer","text":"xAI opened role Backend Engineer."},{"subject":"Backend Engineer","predicate":"is classified as","object":"job signal","text":"Backend Engineer is classified as job signal."},{"subject":"Backend Engineer","predicate":"belongs to","object":"hiring desk","text":"Backend Engineer belongs to hiring desk."},{"subject":"Backend Engineer","predicate":"has context","object":"London, UK","text":"Backend Engineer has context London, UK."},{"subject":"Backend Engineer","predicate":"has evidence coverage","object":"1 captured evidence page","text":"Backend Engineer has evidence coverage 1 captured evidence page."}]},"signal":{"id":"cc8b7895-1048-4753-99b3-0ec145652a08","url":"https://onlylabs.fyi/signals/cc8b7895-1048-4753-99b3-0ec145652a08","json_url":"https://onlylabs.fyi/signals/cc8b7895-1048-4753-99b3-0ec145652a08/signal.json","source_url":"https://job-boards.greenhouse.io/xai/jobs/4991448007","title":"Backend Engineer","summary":"xAI 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":"xai","name":"xAI","category":"frontier-lab"},"occurred_at":"2026-06-10T16:49:17+00:00","first_seen_at":"2026-06-05T05:42:58.637283+00:00","date_source":"greenhouse.updated_at","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/xai/jobs/4991448007"]},"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/xai/jobs/4991448007","final_url":"https://job-boards.greenhouse.io/xai/jobs/4991448007","title":"Backend Engineer","http_status":200,"content_type":"text/html; charset=utf-8","capture_method":"plain","fetched_at":"2026-06-11T02:32:22.44586+00:00","bytes":49105,"raw_path":"ad9cf7ec485eaee9e6ffcd0b958727703a75ada570c1d9b151dbb76e1d676dba.html","content_hash":"64f50e365c88a9f58415995e5bcc604d5b4246f92431216628e9c71ce446c4af","excerpt_chars":1200,"truncated":true,"excerpt":"Job Application for Backend Engineer at xAI Back to jobs Backend Engineer London, UK Apply ABOUT xAI xAI’s mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. Our team is small, highly motivated, and focused on engineering excellence. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. We operate with a flat organizational structure. All employees are expected to be hands-on and to contribute directly to the company’s mission. Leadership is given to those who show initiative and consistently deliver excellence. Work ethic and strong prioritization skills are important. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates. ABOUT THE ROLE: In this role you will work on xAI's production systems that power the API. The actual team matching will happen at the offer stage. As an ideal candidate you have a good understanding of how highly scalable and reliable production infrastructure is built. You strive for perfection and listen carefully to your users in order to solve any..."},"evidence_pages":[{"url":"https://job-boards.greenhouse.io/xai/jobs/4991448007","final_url":"https://job-boards.greenhouse.io/xai/jobs/4991448007","title":"Backend Engineer","http_status":200,"content_type":"text/html; charset=utf-8","capture_method":"plain","fetched_at":"2026-06-11T02:32:22.44586+00:00","bytes":49105,"raw_path":"ad9cf7ec485eaee9e6ffcd0b958727703a75ada570c1d9b151dbb76e1d676dba.html","content_hash":"64f50e365c88a9f58415995e5bcc604d5b4246f92431216628e9c71ce446c4af","excerpt_chars":1200,"truncated":true,"excerpt":"Job Application for Backend Engineer at xAI Back to jobs Backend Engineer London, UK Apply ABOUT xAI xAI’s mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. Our team is small, highly motivated, and focused on engineering excellence. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. We operate with a flat organizational structure. All employees are expected to be hands-on and to contribute directly to the company’s mission. Leadership is given to those who show initiative and consistently deliver excellence. Work ethic and strong prioritization skills are important. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates. ABOUT THE ROLE: In this role you will work on xAI's production systems that power the API. The actual team matching will happen at the offer stage. As an ideal candidate you have a good understanding of how highly scalable and reliable production infrastructure is built. 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