Nikhil Kumar

Experience

• 

  Tata Consultancy Services

  Sept 2007 - Jun 2013

  Software Engineer

  ● Designed & implemented Python, Java, C++ tax automation modules for Indian states, boosting efficiency & streamlining processes.● Optimized travel token/smart card database for a major Indian city's Metro system, resulting in significant improvements in transaction speed, accuracy, and revenue.● Automated efficient data ingestion, transformation, and loading (ETL) processes for improved data pipeline management.● Utilized Pytest & Jenkins for CI/CD practices, improving software quality & reducing development turnaround time.● Possess expertise in Python, Java, C++, and familiarity with cloud platforms. Show less

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  Walmart Global Tech

  Nov 2021 - now

  Software Engineer 3

  ● Developed and deployed highly scalable cloud data warehouses on GCP and Azure, achieving a 30% improvement in data processing efficiency through custom-designed query pipelines, enabling faster data insights for business stakeholders.● Engineered data pipelines using PySpark, GCP, and Airflow, employing dimensional modeling to support inventory loss analysis. This resulted in a projected cost saving of $10 million over 5 years and improved inventory management decisionmaking.● Automated 70% of data pipeline testing using Pytest, ensuring data quality and integrity while reducing manual testing time by 60%. This freed up valuable resources for further data engineering initiatives.● Optimized big data processing using Apache Spark on a large e-commerce dataset, resulting in a 2x reduction in processing time for daily sales reports.● implemented robust data security measures, including access controls and encryption, to ensure data privacy and compliance with PCI-DSS regulations for a financial services client.● Proactively monitored and maintained data pipelines, identifying and resolving a critical performance bottleneck that yielded a 15% improvement in data loading speed. Show less