Hi, I'm Sasidharan Rathinam.
Data Expert & Freelance Consultant
Experienced data expert specializing in scalable data pipelines, analytics platforms, and performance-driven data architectures for startups and growing businesses.
9+ Years
Experience in Data Field
Cloud Native
Expert in AWS, and Modern Data Stack
High Impact
Delivering scalable solutions for Startups & SaaS
What I Do
See all services →I specialize in designing and building robust data infrastructures. From setting up your first data warehouse to optimizing complex ETL pipelines processing terabytes of data, I help businesses unlock the true value of their data.
- ELT/ETL Pipeline Development
- Data Warehouse Architecture (Snowflake, Redshift)
- Data Lakehouse Implementation
- Performance Tuning & Cost Optimization
Featured Projects
View all projects →Latest Articles
Read all posts →
Why Your Spark Job Is Slow: The Hidden Cost of Driver-Heavy Logic
A deep technical dive into Spark driver bottlenecks, common anti-patterns, and how to refactor PySpark code for true distributed execution.
The Hidden Cost of Bad Data Modeling in Analytics Systems
How poor data modeling silently increases cloud costs, slows analytics, and erodes trust—and how to design models that scale.