2025 — Now
Associate Director, Technical Consulting
IP-Tech SaaS Company (Tokyo)
Managing 11 technical consultants. Building GenAI-powered tools for enterprise data migration. Implementing agentic workflows to improve processes.
Data Platform Engineer
Yuhao Dai
Building scalable data infrastructure and AI systems. Based in Tokyo, Japan.
About
Data Platform Engineer with 8+ years building cloud-native, scalable data infrastructure. I've owned platform-wide architecture at global pharmaceutical and FMCG enterprises in Japan, specializing in lakehouse modernization, CI/CD pipelines, and data governance.
Currently exploring the intersection of LLM engineering and enterprise data platforms—building agentic workflows that automate day-to-day operations.
English
TOEFL 115 · TOEIC 950
Japanese
JLPT N1
Chinese
Native
Experience
2023 — 2024
Senior Data Engineer — Platform Owner
Global Pharmaceutical Company (Japan)
Owned Common Data Platform for Region Japan. Led 5-member platform team. Rebuilt normalization and mart layers. Implemented Dagster, dbt, Snowflake stack.
2022 — 2023
Senior Data Engineer
Major FMCG Company (Japan)
Built data migration pipelines from legacy systems to ADLS. Designed logical data warehouse and lakehouse PoC with Delta tables. Automated ETL with PySpark, Synapse, and Airflow.
2021 — 2022
Data Analyst & Infrastructure Engineer
Leading Crypto Exchange (Japan)
Solo DW migration to Snowflake. Established Data Analysis office. ML modeling for user clustering and AML anomaly detection.
Earlier
Global IT Services Firm — Associate, GCP Technical Support (2021)
Education Startup (Beijing) — COO & Co-founder (2018–2020)
Contract Projects
2026 — Now
LLM Engineer
AI Transformation Consultancy (Shibuya)
Partnering with business leadership to drive AI-shift of core operations. Designing AI-centric architecture (autonomous execution vs. HITL boundaries), full-stack LLM backends, multi-agent systems, and reusable prompt-chain libraries. Practicing spec-driven, AI-DLC development across design, coding, review, and operations.
LLM
RAG
LangChain
LangGraph
Multi-Agent
Python
2025 — 2026
BI Lead
Global Luxury Goods Group (Japan)
Leading full BI platform migration from PowerBI to Looker for luxury brand analytics. Designed LookML data models aligned with HQ standards, migrated 50+ dashboards, and built DevOps automation reducing deployment time by 70%.
Looker
LookML
BigQuery
dbt
Monte Carlo
2025
Backend Engineer
AI Startup (Japan)
Built RAG chatbot systems processing 10K+ documents using LangChain. Developed semantic chunking tools for unstructured Excel data. Created internal LLM tooling including Slack bot, knowledge base UI, and automated deploy pipelines.
Python
LangChain
FastAPI
Azure
Terraform
2024 — 2025
Backend / Engineering Manager
Voice AI Startup (Japan)
Architected voice AI platform handling 1000+ daily calls. Built Terraform IaC across 5 Azure projects. Designed phone AI agent prompts and voice synthesis backend. Led engineering team while establishing CI/CD with GitHub Actions.
Python
TypeScript
FastAPI
Next.js
Azure
Terraform
2024
Analytics Engineer
Retail Tech SaaS (Japan)
Implemented Data Vault 2.0 architecture for retail analytics platform. Designed and maintained scalable data models serving 100+ business users. Optimized query performance reducing report generation time by 60%.
dbt
Snowflake
Data Vault 2.0
Python
Skills
Data Platform
- Snowflake
- dbt
- Dagster
- Airflow
- Azure Data Factory
Cloud
- Azure
- GCP
- AWS
- Docker
- Kubernetes
Languages
- Python
- SQL
- Scala
- Java
- Spark
AI / ML
- LLM Agents
- RAG
- PyTorch
- TensorFlow
- scikit-learn
Certifications
AWS
Solutions Architect Associate
GCP
Professional Cloud Architect
GCP
Professional Data Engineer
GCP
Professional ML Engineer
Azure
AI Engineer Associate
Education
BA, English Literature
Doshisha University, Kyoto
2017 — 2021