Lead Data Engineer, Semantic Graphs & Ontology

MathCo; San Francisco (CA); On-site; USD 170,000 - 230,000; Full time

Job summary

MathCo is seeking a Lead Data Engineer to support an Enterprise Context Layer and Ontology initiative for a leading fashion retail organization. This role focuses on designing and building the semantic foundations that connect enterprise data, business concepts, and AI-driven applications.

The ideal candidate brings strong experience in ontology design, knowledge graphs, domain modeling, metadata management, and entity resolution, along with hands-on engineering skills in Python, SQL, and cloud

Qualifications

• Strong hands-on experience with ontology design and/or knowledge graph development.
• Experience with domain modeling, semantic data modeling, and entity resolution.
• Strong understanding of metadata management, semantic standards, data governance, and data stewardship.
• Advanced proficiency in Python and SQL.
• Experience building solutions within GCP environments.
• Experience designing or consuming APIs and cloud-based services. Ability to operate at both architecture/design level and hands-on engineering level.
• Strong communication skills with the ability to work across technical and business stakeholders.

Responsibilities

• Lead the design and development of enterprise ontologies, knowledge graphs, and domain models.
• Define relationships between business entities, concepts, data assets, and metadata to establish a scalable enterprise context layer.
• Develop approaches for entity resolution, semantic modeling, and metadata management across complex enterprise datasets.
• Establish and apply semantic standards to improve consistency and interoperability across data domains.
• Partner with business, data, and engineering stakeholders to translate retail concepts and requirements into robust domain models.
• Incorporate data governance and stewardship principles into ontology and metadata solutions.
• Support prompt and context engineering use cases by making enterprise knowledge and relationships more accessible to AI-enabled applications.
• Build and integrate solutions using Python, SQL, APIs, and GCP services.
• Work with engineering infrastructure including Cloud Run, GKE, Cloud Functions, and CI/CD pipelines.

Skills

Ontology design

Knowledge graphs

Domain modeling

Metadata management

Data governance

Data stewardship

Python

SQL

Communication skills

Tools

GCP

APIs

Cloud Run

GKE

Cloud Functions

CI/CD

Job description

MathCo is seeking a Lead Data Engineer to support an Enterprise Context Layer and Ontology initiative for a leading fashion retail organization. This role focuses on designing and building the semantic foundations that connect enterprise data, business concepts, and AI-driven applications.

The ideal candidate brings strong experience in ontology design, knowledge graphs, domain modeling, metadata management, and entity resolution, along with hands-on engineering skills in Python, SQL, and cloud