Karanpreet Singh

Staff Software Engineer with 9+ years of proven expertise in designing and building distributed systems and cloud-native applications. Specialized in scalable backend architecture, API design, and system performance optimization. Recognized for writing clean, maintainable code and driving engineering excellence in global, cross-functional teams.

• Billing Translog Consumer: Developed a highly scalable, event-driven application leveraging Kafka and Vert.x to process merchant billing across multiple countries at 27,000 TPS. Implemented robust message failover handling and optimized database insertions through efficient batch processing to ensure reliability and performance.
• Location Platform: Built and optimized a high-performance Platform managing Walmart’s global location data, developing scalable APIs with advanced filtering and high TPS support; utilized GraphQL for efficient data retrieval, SOLR for search, Kafka for messaging, and leveraged distributed systems like Cassandra and Memcached to ensure low-latency access, while implementing concurrency techniques to execute parallel GraphQL queries and consolidate responses for maximum efficiency.
• Incident Manager: Designed and implemented APIs to assist Walmart store managers in efficiently managing delivery operations during emergencies. Developed solutions to track incident status for individual stores and automatically update multiple store locations by disabling pickups and canceling deliveries. Leveraged multithreading to process updates concurrently across multiple stores, enhancing performance and response time.
• Global Supplier Experience: Developed APIs for the Global Supplier Experience (GSE) platform at Walmart, enabling seamless supplier onboarding and lifecycle management; implemented caching solutions to improve performance and introduced workflow orchestration to simplify and automate supplier processes across the ecosystem.