Niroj Koirala

About Niroj Koirala

I am a results-driven Data Engineer with proven experience of over 5 years, designing and…

Experience

1. Data Engineer

   Optum

   Sep 2023 — Present · NY, US

   As a Data Engineer at Optum, New York, I design and optimize large-scale, HIPAA-compliant data pipelines and platforms to drive healthcare analytics and predictive modeling. I work extensively with Apache Spark, Databricks, Snowflake, and Azure to deliver clean, reliable, and real-time datasets for clinical, actuarial, and care management teams. My work includes modernizing legacy systems to cloud-native architectures, enabling interoperability with FHIR APIs, and building secure, scalable solutions that enhance population health insights and operational efficiency.Key Contributions * Optimized ETL pipelines with Apache Spark and Databricks, cutting execution time by 40%* Built real-time streaming pipelines with Kafka and Spark Structured Streaming for eligibility and claims data* Modernized legacy SSIS workflows to Azure Data Factory and Synapse, improving scalability* Designed secure data frameworks with RBAC, data masking, and HIPAA compliance* Developed scalable data marts in Snowflake for provider performance analytics* Implemented automated data quality checks using Great Expectations and PySpark* Created CI/CD pipelines with Azure DevOps to streamline deployments and rollbacks* Enabled interoperability by supporting FHIR-based APIs for seamless payer-provider data sharing* Delivered actionable insights via Power BI and Grafana dashboards for pipeline monitoring and SLA adherence

Education

• York College of the City University of New York

  Bachelor's degree