Remote Lead Knowledge Graph Architect

Hexagon AB; United States; Remote; USD 140,000 - 190,000; Full time

Job summary

Hexagon AB's Octave platform seeks a Principal Software Developer to own the Graph Engineer role, combining knowledge engineering, graph data modeling, and software engineering.

You will design and govern the ontology, build the graph construction pipeline, and ensure the graph remains trustworthy, current, and highly queryable.

This remote-friendly position supports multiple U.S. sites (Houston, Madison, New York) and emphasizes cross‑domain reasoning across industrial assets.

Qualifications

• 5+ years in data or knowledge engineering
• Experience designing graph data models for production systems
• Familiar with LPG data models and graph databases
• Proficiency in Java or Python and Spring Boot
• Experience with LLM-assisted data engineering and schema synthesis
• Strong ontology design principles and data modeling instincts

Responsibilities

• Own the Octave canonical ontology - the labeled property graph (LPG) schema
• Lead ontology tool development (Platform Studio Data Engineering Tool) including schema parsing and synthesis
• Design and implement the entity resolution layer for cross-product identities
• Own provenance and lineage metadata, source attribution, freshness, and conflict notes
• Collaborate with domain experts to encode knowledge into the ontology taxonomy and relationships
• Design the graph query surface for Aria agents and MCP tool schemas
• Drive ontology versioning, schema evolution, deprecation, and compatibility
• Contribute to knowledge engineering methodology for eliciting tacit domain expertise

Skills

Graph data modeling

LPG data models

Graph databases

Cypher

Java

Python

Ontology design

Data modeling

Tools

Neo4j

Amazon Neptune

Platform Studio Data Engineering Tool

Spring Boot

Fabric notebooks

OData

OpenAPI

GraphQL tooling

Job description

Hexagon AB's Octave platform seeks a Principal Software Developer to own the Graph Engineer role, combining knowledge engineering, graph data modeling, and software engineering.

You will design and govern the ontology, build the graph construction pipeline, and ensure the graph remains trustworthy, current, and highly queryable.

This remote-friendly position supports multiple U.S. sites (Houston, Madison, New York) and emphasizes cross‑domain reasoning across industrial assets.