# Karan Ratra > Engineering Leader @ Walmart E-Commerce | LinkedIn Top 1% Voice in Systems Design πŸ…| Software Design πŸ…| Engineering Management πŸ…| Judge | Mentor Location: San Bruno, California, United States Profile: https://flows.cv/karanratra I am an Engineering Leader with over 16 years of experience building and scaling complex, high-performance systems across e-commerce, fintech, and telecom industries. Currently serving as Senior Engineering Manager II at Walmart Global Tech, where I lead global teams driving Walmart’s fulfillment platform, orchestrating systems that process millions of daily transactions. My core expertise includes microservices architecture, event-driven systems, secure APIs, and AI-powered orchestration frameworks. I’ve led critical programs that modernized infrastructure, improved order accuracy, reduced latency, and enhanced customer experience at scale. My work has earned multiple awards, including the Walmart Impact Award, and PayPal Golden Envelope. As a Senior IEEE Member, SCRS Distinguished Fellow, and Top 1% Global Mentor on ADPList, I actively contribute to the global tech community through mentorship, conference judging, and research. I’ve judged major hackathons like HackMIT, HackHarvard, CalHacks, and NASA Space Apps, and reviewed papers for top IEEE conferences. I thrive at the intersection of strategy and systems, blending deep technical expertise with a strong focus on team growth, cross-functional collaboration, and business impact. Let’s connect if you're passionate about tech leadership, distributed systems, or building the future of digital commerce. ## Work Experience ### Engineering Lead @ Walmart Global Tech Jan 2023 – Present | Sunnyvale, California, United States ### Senior Software Engineering Manager @ Walmart Global Tech Jan 2022 – Jan 2023 | Sunnyvale, California, United States ### Staff Software Engineer @ Walmart Global Tech Jan 2020 – Jan 2022 | Sunnyvale, California, United States ### Senior Software Engineer @WalmartLabs @ Walmart Global Tech Jan 2017 – Jan 2020 | San Bruno, California, United States ### IEEE Senior Member @ IEEE Jan 2025 – Present ### IEEE Member @ IEEE Jan 2024 – Present | California, United States ### Member IET @ Institution of Engineering and Technology (IET) Jan 2024 – Present | United States ### Member BCS @ BCS, The Chartered Institute for IT Jan 2024 – Present | California, United States ### Software Development Engineer 3 @ PayPal Jan 2016 – Jan 2017 ### Software Development Engineer 2 @ PayPal Jan 2013 – Jan 2016 Coming up with the design of the new feature. Implementing the design in Java & J2EE ### System Analyst @ Subex Ltd Jan 2011 – Jan 2013 Worked on a MTN syria CRM & Fraud management Project for Comcast Telecommunications Ltd. USA (www.xfinity.com) and MTN Syria (http://www.mtn.com.sy/) Solution Provided for the MTN Syria Collections System. Software Engineer ### Software Development Engineer @ Subex Ltd Jan 2010 – Jan 2011 Responsible for developing telecom product "Credit Risk Management". Involved in design & development of the product multi-threaded, configurable workflow engine responsible for high volume of data processing. Implemented ROC CRM in Optus Telecommunications Australia (www.optus.com.au) ### Software Engineer @ EXILANT Technologies Private Limited Jan 2009 – Jan 2010 Software engineer at Exilant Technologies Pvt. Ltd. Worked for Apple Inc. Environment- Objective - C, C, C++, Java, Oracle -10g Involved in Development, Database Handling, Testing & Documentation, Reporting Description: Sonar is a bug-tracking tool used for tracking the problems faced by the Customer with respect to an Apple product. The issues or bugs are reported by the Customer with help of an Email or a fax or even through phone. The Email address provided along with the product is mapped to an Email address in Sonar. The Emails/Phone Ins/ Fax Ins sent by the Customers for the problems faced by them are converted to a Request in Sonar. All the activities performed for solving the issue are mapped to this Request. ### Summer Internship @ BSNL LTD Jan 2008 – Jan 2008 | India During my internship at BSNL in 2008, I undertook a project to develop an Intranet Messaging System using Java (J2SE). The objective was to enhance internal communication within the organization by providing a reliable and efficient platform for employees to exchange messages. The system was designed to operate within BSNL's intranet, ensuring secure and swift communication across different departments. Leveraging the capabilities of Java (J2SE), I developed a user-friendly interface that facilitated real-time messaging, notifications, and file sharing. The project involved thorough planning, coding, and testing to ensure robustness and scalability. This experience allowed me to deepen my understanding of Java programming and network communication protocols, while also contributing to improved operational efficiency at BSNL. The successful implementation of this system was a significant achievement during my internship, demonstrating my ability to apply technical skills to solve practical problems in a real-world setting. ## Education ### Master's Degree in Computer Science Birla Institute of Technology and Science, Pilani ### BE in Computer Science & Engineering Engineering College Bilaspur(C.G.) ### HSC in Mathematics and Computer Science St. John's School ## Contact & Social - LinkedIn: https://linkedin.com/in/karanratra07 - Portfolio: http://www.subex.com/ - Portfolio: http://www.exilant.com - Portfolio: https://Walmart.com --- Source: https://flows.cv/karanratra JSON Resume: https://flows.cv/karanratra/resume.json Last updated: 2026-04-11