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Intermediate Graph Developer; Semantic Data Platform
Job Description & How to Apply Below
About Delta Intelligent Building Technologies (Canada) Inc. (formerly known as Delta Controls)
Delta Intelligent Building Technologies (Canada) Inc. is a leading building controls manufacturer. For over three decades, we have provided innovative building automation solutions for commercial, healthcare, education, and leisure facilities.
Intermediate Graph Developer (Semantic Data Platform)
Job Summary
We’re looking for an Intermediate Graph Developer to help build a next-generation semantic graph data platform - a “digital twin” layer for buildings, equipment, and their relationships.
This platform will power AI-assisted querying and insights by ingesting RDF-based semantic data, exposing it through APIs and query interfaces, and supporting both cloud and on-prem deployments (with future extensibility to edge environments).
Duties and Responsibilities
Graph Data & Semantic Modeling
Design and evolve a labeled graph model for entities, relationships, and properties
Apply RDF, JSON-LD, and built-environment ontologies
Extend domain models as needed for real-world building systems
Storage Layer & Performance
Work with graph databases or RDF stores
Ensure scalable and portable architecture
RDF Ingestion & Validation
Implement ingestion for Turtle, JSON-LD, and RDF/XML formats
Maintain triple integrity and query ability after import
Add robust error handling and optional SHACL validation
Query Interface
Build and validate a SPARQL-compatible (or equivalent) query endpoint
Support multi-hop queries and scoped aggregation (per-building vs global)
Enable natural follow-up query patterns (e.g., narrowing results by floor or system type)
REST API Development
Create clean, well-documented REST endpoints for entity access and CRUD operations
Support JSON-LD and pagination for large datasets
Security & Permissions
Enforce consistent access control across APIs and query layers
Build event-driven update mechanisms
Support AI-assisted classification and enrichment with provenance tracking
Attachments & Metadata
Link documents and media (PDF, DWG, images, spreadsheets, etc.) to graph entities
Store and expose searchable metadata for attachments
Deployment & Operations
Implement health checks, TLS, and environment-based configuration
Required
Skills and Abilities
3+ years of backend software engineering experience building data-intensive services
Experience in Python object-oriented programming (OOP), Terraform Infrastructure as Code (IaC), and Amazon Web Services (AWS) cloud services
1–2+ years of experience with graph databases, RDF triple stores, or semantic systems
Working knowledge of RDF, JSON-LD, URIs, and SPARQL (or equivalent graph query patterns)
Experience building REST APIs with clear contracts and robust error handling
Experience deploying services on AWS or GCP, with interest in on-prem deployments
Strong performance mindset, including indexing, query profiling, and debugging slow queries
Preferred
Skills and Abilities
Familiarity with building and equipment domain modeling, including spaces, equipment, points, and relationships
Experience with SHACL validation and RDF ingestion pipelines
Experience designing multi-environment systems (cloud, on-prem, edge) with consistent APIs and feature gating
Exposure to AI-enabled data systems, including agents, retrieval systems, provenance, and grounding strategies
Work Location:
Hybrid (3 days on-site, 2 days remote)
City: Surrey
Type: Full-time, Permanent
Salary: $95,000 to $120,000 CAD
Why work for us?
Employee & safety centric culture
Flexible hours and scheduling available
Competitive total compensation along with generous vacation allowances
Three weeks of vacation
in-house & external training provided along with education support and opportunities for growth
Company funded annual personal development budget
Financial benefits & planning such as group RRSP & company match
Employer paid premiums for extended healthcare and family-focused benefits (health, vision and dental)
Travel insurance coverage and access to the Employee Assistance Program (EAP)
Wellness - onsite fitness center & company reimbursement for personal gym memberships
Internal Recognition & Service Awards
Transit accessible with free onsite parking
Regular company events such as "Food Truck Fridays", Lunch & Learn and other planned activities
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