{"id":745875,"url":"https://alion.io/job/town-ai-context-data-infrastructure-engineer","title":"AI Context & Data Infrastructure Engineer","company":{"id":687173,"name":"Town","domain":"town.com","url":"https://alion.io/company/town-4","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":75,"open_postings":4,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-11-02T06:13:15Z"}},"role":"DevOps","role_family":"DevOps","seniority":null,"employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["San Francisco, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":250000,"max":300000,"currency":"USD","period":"year","gross":null,"usd_annual":300000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Embeddings","optional":false},{"name":"Knowledge Graph","optional":false},{"name":"Semantic Search","optional":false},{"name":"Slack","optional":false},{"name":"AI Agents","optional":true},{"name":"LLM","optional":true}],"status":"live","first_seen_at":"2026-08-29T19:18:15Z","employer_posted_date":"2026-08-29","last_verified_at":"2026-11-02T17:33:45Z","board_verified":true,"closed_at":null,"days_open":64,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":64},"description":"About Town\nTown is building the AI coworker for every team. Everyone gets their own Townie, an AI assistant that learns how you work (your voice, judgment, relationships, and priorities) and does real work on your behalf across email, calendar, docs, Slack, and CRM. Townies don't wait to be prompted. They observe, learn, and act. And because every teammate has one, Townies can ask each other questions and hand off work, so the whole team moves faster together.\nFour months after our public launch, we became a $1B company. We recently raised a $108M Series B, co-led by Forerunner Ventures and Menlo Ventures, with continued support from Andreessen Horowitz, First Round Capital and angels such as Zach Perret, Soleio Cuervo, Scott Belsky, and more. Our founders, Jean-Denis and Tony, previously led EPD at Plaid and applied AI product at Google.\nAbout the role\nTown is building the most personalized, most capable AI assistant for everyone - and personalization at that level is a retrieval and data problem. The assistant is only as good as the context it can bring into the moment: the right memory, message, document, or relationship, pulled fast and related by meaning across everything a person and their team touch.\nYou'll build the foundation the whole product reasons over: the search and data infrastructure behind that context. One shared retrieval layer combining lexical and semantic search, the realtime and batch pipelines that keep it fresh and correct, and the durable data model everything else is built on.\nThis is greenfield and high-leverage: you'll be the first person building this layer.\nWhat you'll do\nBuild the search and retrieval layer that puts the right context at every Townie's fingertips, the moment it's needed - one shared layer the whole product pulls from instead of refetching context on its own.\n\nCombine lexical and semantic search and own the tradeoffs between them: vector vs. lexical, precompute vs. fetch, hybrid retrieval, and ranking.\n\nDesign the durable data model the assistant's work is built on, so context is relevant, fast, and cost-effective.\n\nBuild and operate the pipelines behind it - realtime/streaming and batch - that keep the index fresh and correct as the underlying data changes.\n\nStand up the indexing and storage layer and keep it fast and reliable at scale: latency, cost, freshness, and completeness.\n\nLay the groundwork for relating content by meaning across everything the assistant knows - the start of a knowledge graph of people, companies, projects, and how they connect.\n\nYou might thrive here if you...\nHave significant, hands-on experience across lexical and semantic search components and approaches (BM25, embeddings, ANN/vector indexes, hybrid retrieval, ranking).\n\nHave run large-scale data infrastructure, ideally both realtime/streaming and batch - pipelines, indexing, and storage.\n\nCan make retrieval fast and cheap at scale, and reason about the latency, cost, and freshness tradeoffs cold.\n\nAre a systems thinker comfortable in greenfield, where the foundation doesn't exist yet.\n\nAre excited to take these systems from rapid prototype to production scale.\n\nBonus if you've worked on ranking/relevance, knowledge graphs, or retrieval for LLM or agentic systems.\n\nLocation\nSan Francisco, CA. Five days a week in person at our Financial District office.","description_format":"text","description_chars":3340,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","AI Agents"],"lifecycle":[{"event":"open","at":"2026-09-11T14:11:33Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 2","filings_12m":2,"filings_prev_12m":1,"green_card_filings_12m":0,"median_offered_wage_usd":192500,"route":null,"cap_exempt":false,"checked_at":"2026-10-29T16:27:21+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)"],"filings_for_role_12m":1}],"liveness":{"score":10,"band":"cold","label":"Long shot","p_open":1,"p_active":0.292,"p_room":0.36,"age_days":64,"expected_fill_days":38,"reasons":["conf:1","win:tail","crowd:"],"computed_at":"2026-11-02T06:13:15Z"},"pay":{"stated_usd_annual":300000,"is_top_pay":true},"html_url":"https://alion.io/job/town-ai-context-data-infrastructure-engineer","json_url":"https://alion.io/job/town-ai-context-data-infrastructure-engineer.json","meta":{"generated_at":"2026-11-02T17:41:17Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":24565,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-03T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":687173},"rest":"https://alion.io/mcp/rest/get_company?id=687173"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ftown-ai-context-data-infrastructure-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Ftown-ai-context-data-infrastructure-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Ftown-ai-context-data-infrastructure-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/town-ai-context-data-infrastructure-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ftown-ai-context-data-infrastructure-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":745875}},{"tool":"search_jobs","arguments":{"company":"town.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":745875},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. Docs: https://alion.io/developers"}}