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Software Engineer, Ontology

Fluidstack· Acceleration
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San Francisco, CA, New York, NY, Austin, TX, Seattle, WA$224k - $279kFull-timePosted 3mo ago

About the role

Role focused on building the index and graph engine for Fluidstack’s operational data, defining entities and identity rules, and delivering timely, provenance-backed signals from continuous data changes.

Responsibilities

  • Build the index and graph engine that connect Fluidstack’s operational data, documents, and conversations as new information arrives.
  • Define the entities, relationships, and identity rules that let teams contribute knowledge about sites, equipment, orders, and incidents.
  • Detect meaningful changes and publish evidence-backed signals when observed state diverges from plan.
  • Give engineers and agents fast, authorized ways to query the business, with clear provenance and freshness on every answer.
  • Measure change-to-knowledge latency, answer quality, and signal quality against real operational questions and events.

Qualifications

  • You’ve built and operated a foundational data system that multiple teams relied on to make decisions or run critical workflows.
  • You’ve made heterogeneous data sources work as one coherent model that people and software can rely on.
  • You’ve built data platforms with extensible models that let other teams bring new domains and questions into the system.
  • You’ve built systems that turn a continuous stream of changes into timely, reliable signals for operations.
  • You’ve worked directly with domain experts to define what their data means and which changes matter.
  • You’ve made hard calls between correctness, freshness, query speed, and access control, then revised those choices using production evidence.

Skills

Required:Foundational data system design and operationData modeling across heterogeneous sources
Nice to have:Domain-driven design and ontology

Benefits

  • We share base pay ranges for all US-based job postings.
  • Equity for all full-time roles.
  • Benefits and, for applicable roles, commissions plans.
Last updated Oct 20, 2026. Interested? Apply on the company site.
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About Fluidstack

Fluidstack builds civilization-scale infrastructure for AI

Fluidstack builds civilization-scale infrastructure for AI, delivering gigawatts of compute in 6 months. We're leading the deployment of Anthropic's $50B compute build out.

AI infrastructurecompute centershardwaresoftwarepowerdata centersAnthropicfrontier compute
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