Johan Sebastian V.

Data & AI Platform Architect | AI Agents, RAG, Snowflake & Power BI

I help companies build reliable data platforms and production-ready AI agents that automate decisions, customer workflows, and access to business knowledge. With 12+ years of experience in data engineering, BI, and cloud architecture, I connect the complete lifecycle—from ingestion and governed data models to RAG assistants, automation, and executive analytics. I can help you with: AI & Automation • AI agents and copilots using LLMs, RAG, Python, APIs, and serverless architecture • Secure knowledge assistants for Microsoft Teams, web, and internal operations • Customer-service agents for lead qualification, bookings, notifications, and workflow automation • LLM integration, prompt workflows, guardrails, human escalation, and observability Data Platforms & BI • Architecture using Snowflake, Databricks, Azure, AWS, and Microsoft Fabric • Reliable ETL/ELT pipelines with dbt, Airflow, Dagster, and Azure Data Factory • Scalable Raw → Silver → Gold data models • High-performance Power BI semantic models, dashboards, and KPI frameworks • Testing, CI/CD, documentation, data quality, governance, and cost optimization Selected AI work: • Built a secure corporate Microsoft Teams assistant using AWS Lambda and RAG for governed access to internal knowledge • Designed Vai, a multichannel AI agent for customer support, lead qualification, bookings, and business workflow automation across WhatsApp and web • Integrated LLM-assisted data quality, validation, and pipeline automation into modern data platforms Core stack: Python, SQL, LLMs, RAG, AWS Lambda, Azure, Snowflake, Databricks, dbt, Airflow, Power BI, Fabric, APIs, Docker, and Kubernetes. If you need an AI agent grounded in your business data—or a modern data platform ready for AI—send me your current stack and the outcome you want to achieve.