DX engineer who turns conversations with business teams into systems people actually use. I build data platforms and generative-AI workflows, from requirements through operations.
- Data platforms: build and run analytics foundations on BigQuery, dbt, TROCCO and Terraform, with dashboards in Looker Studio.
- Generative AI at work: design business AI with Claude (MCP), Dify and n8n. I choose models, analyze wrong answers, and shape outputs so teams keep using them.
- E-commerce integrations: develop and maintain integrations between multi-channel e-commerce platforms and order management systems.
- Teams and enablement: led maintenance teams and offshore development (in English), and help non-engineers build their own tools.
- Languages: Python, Java, PHP, JavaScript / TypeScript, SQL
- Data & Cloud: BigQuery, dbt, Terraform, Google Cloud, AWS
- AI: Claude (MCP), Dify, n8n, OpenAI, Gemini
| Project | What it is |
|---|---|
| ec-analytics-platform | Reference analytics platform for multi-channel e-commerce: dbt + BigQuery + Terraform, with every model tested in CI |
| business-ai-evals | Evaluation harness for business LLM features: labeled cases, error taxonomy, prompt comparison and a CI quality gate |
| ec-orders-mcp | Read-only MCP server that lets Claude analyse order data safely: guarded SQL, PII masking and an audit log |
| dify-business-ai | Dify apps for order-sheet extraction and inquiry triage, where code checks the LLM output; accuracy measured on Dify Cloud |
| ec-order-hub | Spring Boot service that imports orders from several marketplaces into PostgreSQL: incremental, idempotent, retried, with a review queue; Docker and Terraform for AWS |
| ai_bot_app | AI chatbot for LINE and Facebook Messenger with text and image generation and voice transcription |
| ai_mate | Low-latency voice-to-voice conversational AI with a Streamlit admin dashboard |
| ai_bot_app_insta | Bot that creates images with generative AI and posts them to Instagram and Threads with Gemini-written captions |
| draponquest / pinball_mobile | Game ports and remakes in JavaFX and Flutter |
Tech articles on Qiita (in Japanese). Recent ones explain the design behind the side projects above:
- Building an e-commerce analytics platform whose numbers add up with dbt, BigQuery and Terraform
- Evaluating business AI with labeled data: scoring, counting errors by cause, and gating in CI
- Letting Claude analyze order data safely: a read-only MCP server with defense in depth
Earlier articles cover OpenAI / ChatGPT, Vertex AI and AI bots.