{"id":124163,"url":"https://alion.io/job/hophr-principal-ai-architect","title":"Principal AI Architect","company":{"id":19071,"name":"HopHR","domain":"hophr.com","url":"https://alion.io/company/hophr","size_band":null,"is_staffing_agency":true,"employer_type":"agency","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"D","score":42,"open_postings":28,"ghost_share":0.964,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-11-01T06:10:25Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":"lead","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["San Francisco, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":187000,"max_usd":387000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":782},"experience_years_min":5,"visa_sponsorship":true,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Fine-tuning","optional":false},{"name":"Knowledge Graph","optional":false},{"name":"LLM","optional":false},{"name":"Multimodal AI","optional":false},{"name":"RAG","optional":false},{"name":"RLHF","optional":false}],"status":"live","first_seen_at":"2026-04-22T18:34:02Z","employer_posted_date":"2026-04-22","last_verified_at":"2026-11-01T23:33:08Z","board_verified":true,"closed_at":null,"days_open":193,"trust":{"level":"ghost","repost_count":0,"flags":["stale","company_stale"],"days_open":192},"description":"Draup is a Series A-funded agentic AI company building the intelligence layer for how global enterprises make workforce and go-to-market decisions. We work with 250+ enterprise clients - including 5 of the Fortune 10 - processing 1B+ job descriptions, 850M+ professional profiles, and signals from 100+ labor databases.\nWe are now building our Silicon Valley engineering team - a small, senior group focused on next-generation AI research and product.\nLocation: San Francisco, SoMa - minimum 4 days per week in-office.\nWhat you'll do\nDefine and own the architectural vision for next-generation AI systems: novel agent architectures, reasoning systems, and proprietary model development.\nPrototype and evaluate breakthrough AI capabilities - predictive modeling, autonomous signal synthesis, multi-modal intelligence - that create defensible IP.\nSet the technical foundations: data architecture, model serving, agent orchestration, and inference infrastructure for a multi-year product horizon.\nEvaluate and adopt emerging AI paradigms (multi-agent reasoning, RLHF, retrieval-augmented fine-tuning) before they are mainstream.\nEstablish engineering standards, architecture review processes, and IP documentation practices for the team.\nWhat we require\nBS/MS/PhD in Computer Science, AI/ML, or related field. PhD or equivalent research depth preferred.\n5+ years in AI/ML engineering with at least 2 years in a principal engineer or lead architect role.\nDemonstrated history of building original AI systems that became products - not implementations of existing patterns.\nDeep expertise across: LLM training and fine-tuning, agentic system design, knowledge graph construction, large-scale data modeling.\nComfort operating in greenfield conditions: high ambiguity, high ownership.\nPatents, published research, or shipped products with clear proprietary differentiation are strong signals.\nNo visa sponsorship. 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