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Job Description & How to Apply Below
This job is with Hitachi Digital, an inclusive employer and a member of my Gwork – the largest global platform for the LGBTQ+ business community. Please do not contact the recruiter directly.
About Us:
Hitachi Digital is building next-generation data platforms to power AI-driven insights and enterprise-scale analytics. We leverage Google Cloud Platform (GCP) and graph technologies to deliver secure, scalable, and intelligent data ecosystems. We are seeking a Lead Big Query / Graph DBA with deep expertise in Big Query , Neo4j , and graph-based data modeling to design and optimize high-performance data architectures.
Role Overview
As a Lead Big Query / Graph DBA , you will architect, manage, and optimize cloud-native data warehouses and graph databases. You will lead data modeling, query optimization, and integration strategies for structured and graph-based data, enabling advanced analytics and AI workflows across global OpCos.
Key Responsibilities
Database Architecture & Management
Design and maintain Big Query data warehouses for large-scale analytics.
Develop graph schemas, relationships, and knowledge graphs using Neo4j .
Implement data ingestion pipelines, ETL processes, and partitioning strategies for performance optimization.
Performance & Optimization
Optimize SQL queries, Cypher queries, and indexing for high-volume datasets.
Monitor and tune Big Query cost-performance and Neo4j
Ensure high availability, disaster recovery, and backup strategies for critical data assets.
Integration & AI Enablement
Integrate graph databases with AI/ML pipelines for semantic search and contextual reasoning.
Enable RAG workflows and knowledge graph-driven AI for enterprise applications.
Collaborate with data engineering and AI teams to embed graph intelligence into analytics platforms.
Governance & Security
Enforce data governance policies, lineage tracking, and compliance standards.
Implement IAM roles, VPC-SC, and data protection controls on GCP.
Document architecture decisions, query patterns, and best practices.
Required Qualifications
Bachelor's or Master's in Computer Science, Data Engineering, or related field.
8+ years in database administration; 3+ years with Big Query and Neo4j .
Strong proficiency in SQL, Cypher, and data modeling for relational and graph databases.
Hands-on experience with GCP services ( Big Query , IAM, VPC-SC, Cloud Storage).
Familiarity with graph algorithms, knowledge graphs, and semantic modeling.
Understanding of ETL pipelines, data governance, and cloud security.
Preferred Qualifications
Certifications:
Google Professional Data Engineer, Neo4j Certified Professional.
Experience with AI/ML integration, RAG pipelines, and agentic workflows.
Exposure to Looker BI, Power BI, or Tableau for visualization.
Knowledge of Lang Chain, vector databases, and embedding strategies.
Key Competencies
Strong analytical and problem-solving skills.
Ability to design scalable, secure, and performant data architectures.
Collaborative mindset with excellent communication skills.
Passion for graph-driven AI and cloud-native data platforms.
Success Metrics
Deployment of optimized Big Query and Neo4j environments for enterprise analytics.
Integration of knowledge graphs into AI workflows for contextual intelligence.
Reduction in query latency and cost across large-scale datasets.
Positive impact on data quality, governance, and compliance readiness.
What You'll Work With
Cloud & Data: GCP Big Query , Cloud Storage, IAM, VPC-SC.
Graph DB: Neo4j , Cypher, APOC procedures.
AI Integration:
Knowledge Graph + LLM workflows, RAG pipelines.
Tools:
Python, SQL, ETL frameworks, BI tools (Looker preferred).
#LI-MS3
About us We're a global, 1000-stong, diverse team of professional experts, promoting and delivering Social Innovation through our One Hitachi initiative (OT x IT x Product) and working on projects that have a real-world impact. We're curious, passionate and empowered, blending our legacy of 110 years of innovation with our shaping our future. Here you're not just another employee; you're part of a tradition of excellence and a community working towards creating a digital future.
Fostering innovation through diverse…
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