Principal AI Architect
Job Title : Principal AI Architect
The Role :
This is a fully hands-on architect role. You’ll write production code, design schemas, and build systems alongside the team — not create slide decks. If you haven’t coded recently, this role is not a fit.You will lead the RCG implementation track within Pathfinder, design federated knowledge graph architectures for clients, and work directly with the Founder & CEO.
What You’ll Do :
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Design and implement RCG schemas, ontologies, and KG patterns
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Build production systems using Python, Cypher/Gremlin, LangGraph, and AI tooling
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Develop and operate enterprise-scale knowledge graphs on Neo4j and Amazon Neptune
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Design federated KG architectures for multi-tenant deployments
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Lead technical discussions with client architects and CIOs
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Mentor engineers and contribute to patents, white papers, and product roadmap.
Must-Haves :
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8–12 years in software engineering, including 3–4 years in AI/ML systems
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Actively coding and shipping production systems today
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Deep knowledge graph experience with Neo4j, Neptune, TigerGraph, Cypher/Gremlin/SPARQL
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Strong Python and orchestration framework experience (LangGraph/LangChain)
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Hands-on GraphRAG, ontology-driven reasoning, or KG-augmented retrieval experience
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Daily use of AI coding tools like Claude Code, Cursor, or Copilot
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Experience building enterprise-grade systems with governance, lineage, observability, and multi-tenancy
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Degree in CS, Math, Computational Linguistics, or related field from a top institution.
Preferred :
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MS/PhD in graph theory, ML, or knowledge representation
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Open-source contributions or technical publications
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Experience with SAP/ERP data models
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Background in AI-first or product companies
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Strong AWS architecture experience (Bedrock, SageMaker, Neptune, Lambda, IAM).
Not a Fit If :
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You’re no longer hands-on with coding
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Your KG experience is only academic or experimental
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You rely on broad but shallow tooling knowledge
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You don’t actively use AI coding assistants
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You’ve only worked in research or slide-driven consulting roles.