Hari Alokam
Data Engineer @WTW
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WORK HISTORY
Data Engineer @WTW
Contributed to project architecture planning by conducting required proof of concepts (POCs), analyzing cost implications, and preparing detailed resource planning • Implemented Delta Lake in Synapse, enabling ACID transactions, incremental data loading, and optimized data storage for enhanced data reliability. • Migrated the SAS based ETL and large SAS based codes to PySpark notebooks and applied required optimizations.• Optimized large SQL and PySpark code by following best coding practices for Synapse and Databricks • Implemented automated CI/CD pipelines for deploying Azure Data Factory, Synapse, and Databricks solutions• Managed version-controlled releases using Azure DevOps and Git for data engineering artifacts• Streamlined deployment workflows using Infrastructure as Code (ARM/Terraform) for repeatable environment provisioning• Integrated Synapse Notebooks with ADF, Azure Data Lake, and Synapse Pipelines for seamless data orchestration and management.• Collaborated with Data Scientists, Analysts, and business teams to understand reporting and analytics goals, translating them into actionable data engineering solutions using tools like Delta Lake and SQL Server.• Implemented governance and metadata standards in Azure Purview to support a unified and discoverable data strategy • Migrated legacy ETL workflows from SAS and SQL-based systems to PySpark on AWS Glue, improving processing efficiency and reducing operational costs.• Designed and maintained scalable, DAG-based data orchestration workflows using Dagster, ensuring reliability, modularity, and observability across ETL/ELT pipelines.• Developed and deployed end-to-end data pipelines integrating Dagster with Snowflake, AWS S3 and external APIs for real-time and batch data processing.• Re-engineered complex reporting datasets into Redshift-native semantic models and integrated them with Amazon QuickSight for enhanced BI performance and reduced latency.
EDUCATION
J.J. College of Arts & Science, Namanasamuthiram, Pudukkottai - 622 404.
Master of Science - MSc IT, Information Technology
ABOUT HARI ALOKAM
With 12+ years of experience with hands-on work in data engineering, I specialize in…
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