Harsh Vardhan

About Harsh Vardhan

Senior BI Engineer with 6+ years of experience designing and scaling AWS-based big data platforms. I specialize in PySpark, Apache Spark, SQL, and AWS services including Redshift, Glue, EMR, S3, Athena, Lambda, and Step Functions.I have built and owned end-to-end ETL/ELT data pipelines, enterprise data warehouses, and lakehouse architectures powering analytics, business intelligence, and machine learning use cases. My work focuses on performance optimization, cost efficiency, data quality, and reliability at scale.At Amazon, I’ve led high-impact initiatives such as unifying enterprise revenue metrics, cross-account data ingestion frameworks, and large-scale Redshift RA3 migrations, enabling accurate reporting and scalable analytics across organizations.Core expertise:AWS, Data Engineering, PySpark, Apache Spark, SQL, Redshift, Glue, EMR, S3, Athena, ETL, Data Pipelines, Data Modeling, Data Warehousing, Lakehouse, Step Functions, Lambda, Performance Optimization, Cost Optimization, Analytics Engineering.Open to roles: Senior Data Engineer, AWS Data Engineer, Big Data Engineer, Analytics Engineer

Experience

1. Data Engineer Ii

   Amazon

   Mar 2026 — Present · Bengaluru, IN

   Designing and building large-scale data architectures that turn raw data into trustworthy, accessible, and actionable datasets. Previously a Senior BIE — now applying that customer-first mindset to engineering the infrastructure behind the insights.→ Architect end-to-end data pipelines and scalable data models across distributed systems→ Simplify complex data flows, remove bottlenecks, and drive operational excellence→ Make strategic technical trade-offs balancing performance, scalability, cost, and long-term maintainability→ Champion data quality, governance, security, and engineering best practices across teams→ Mentor engineers, lead design reviews, and raise the hiring barTech: SQL | Python | Scala | Spark | AWS (Redshift, EMR, S3, Glue)| Hadoop/HDFS | ETL/ELT | Data ModelingMy superpower: I\'ve sat on both sides of the data — as the consumer building reports and dashboards, and now as the engineer building the infrastructure underneath. That perspective shapes everything I build.

Education

• Delhi Public School

  PCM

  2013 — 2015

• Ramaiah Institute Of Technology

  Bachelor's degree, Mechanical Engineering

  2016 — 2020