Query Optimization with Apache Calcite

I'm looking for a professional with extensive experience in Apache Calcite to help me to set Apache Calcite to optimize Snowflake queries and give me a crash course on Calcite.

Key Requirements:
- Expertise in Apache Calcite, specifically in query optimization
- Proficient with Snowflake
- Ability to optimize simple, complex join, and analytical queries
- Strong understanding of SQL parsing and execution
- Experience with custom data source integration