Sai Vinay Nekkalapu
Data Engineer @ Walmart | GCP & AWS Specialist | Expert in Snowflake, Databricks
- Role
- Data Engineer at Walmart Global Tech
- Location
- Sunnyvale, CA, US
- LinkedIn followers
- 500 followers
About Sai Vinay Nekkalapu
Senior Data Engineer with 7+ years of hands-on experience building enterprise data…
Experience
Data Engineer
Apr 2024 — Present · Sunnyvale, CA, US
Seller Central Data Management: Supporting the Walmart Seller Central team by developing and maintaining a comprehensive data pipeline. This pipeline consolidates critical seller data, enabling efficient tracking of offers, sales, GMV calculations, order statuses, financial insights, score metrics, and competitor analysis in near real-time. Real-time Sales Dashboard in Seller App: Key contributor to Walmart’s new Seller app launch, powering its real-time sales dashboard through Apache Druid MSQ with hourly and daily aggregations. Enabled near real-time insights for order tracking and processing, enhancing data-driven decision-making for sellers. Return-insights Dashboard in Seller center portal: Key contributor to Return insights dashboard in seller center portal for sellers, SFF and WFS, enabling item level API and aggregated one\'s for last 365 days enabling seller to check all the return GMV and return cost amount charged to them and list of items and its count, values etc. Pipeline Development with Apache Spark and Scala: Built data pipelines using Spark on GCP and Azure, with daily and hourly data processing tasks. Leveraged Apache Spark in Scala for direct interaction with Spark Data Frames, ensuring seamless data handling and transformation for seller data insights. JSON Struct Optimization for Enhanced Efficiency: Improved data processing by implementing struct-based JSON handling, reducing serialized processing bottlenecks. This optimized memory usage, cutting GCP and Azure cluster costs by 25% and decreasing job failures by 30%, resulting in smoother data flows and greater stability across workflows. Financial Data Integrity Enhancement: Led critical bug fixes for financial data consistency, including complex issues with bundle item processing and incremental data exports from BigQuery. Regularly troubleshot and resolved high-impact production issues across the data pipeline, ensuring seamless data access and reporting
Education
The University of Texas at Arlington
Master's degree
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