Headline

Senior Software Engineer @ Walmart Global Tech | 7+ YOE | Building Scalable Web Platforms & GenAI Systems | React • TypeScript • Distributed Systems • RAG/LLMs | IIT Guwahati

About

Senior Software Engineer with 7+ years of experience building high-scale web platforms and distributed systems, currently at Walmart Global Tech. I specialize in frontend architecture, backend systems, and applied AI, with a strong focus on performance, scalability, and real-world impact. At Walmart, I’ve: • Built a high-concurrency platform processing 4M+ events with sub-100ms latency • Developed LLM-powered insights and automation systems to improve decision-making at scale • Led end-to-end product development driving conversion, engagement, and platform adoption • Architected event-driven systems (Kafka) and scalable frontend platforms using modern React architecture • Mentored engineers and contributed to systems handling peak-scale traffic I enjoy solving problems at the intersection of: • Scalable Frontend Systems (React, TypeScript, performance engineering) • Distributed Systems (event-driven architecture, APIs, reliability) • Applied AI (LLMs, intelligent automation) Strong foundation in Data Structures & Algorithms, with a focus on building production-grade, maintainable systems.

Location

Bengaluru

AI stack

claude

gemini

github copilot

langchain

langgraph

langsmith

Work experience

Senior Software Engineer at Walmart Global Tech India, Jul 2025 - Present · 1 yr 2 mos, At Walmart Global Tech, I delivered large-scale features and GenAI solutions across Ratings & Reviews and Marketplace platforms. • Built the Sampling Initiative (Recognised Reviewers) UI, driving 74% order-to-review conversion and generating 15K+ authentic reviews. • Developed Seller Responses, enabling 4.1M cumulative replies and adding 10K+ new responses weekly. • Delivered the Actionable Insights suite (Sentiment Analysis, Promotions, Favorites, Blacklisting), boosting Review Manager adoption. • Leading development of the Seller Insights Dashboard with advanced visualizations and predictive models to support seller decisions. • Architecting Askly, a GenAI Slack bot using RAG pipelines, LangChain, LangGraph, and embeddings—reducing manual triage by 60%. • Improved Reviews Pipeline reliability through deep collaboration with Data Science, UGC, and Payments teams. • Drove engineering excellence by adopting Builder.io, integrating QODO workflows, and contributing reusable UI components used across Seller, Supplier, and Customer domains. • Supported business decision-making via Hive analysis + Looker Studio dashboards and mentored a team of five engineers. Tech: React, TypeScript, Slack Bolt, AMCharts, Grafana, Python, LangChain, LangGraph, ChromaDB, RAG

Software Engineer III at Walmart Global Tech India, Jul 2022 - Jul 2025 · 3 yrs 1 mo, At Walmart Global Tech, I led large-scale UI, analytics, and GenAI initiatives across the Seller Center, Supplier domain, and Ratings & Reviews ecosystem. • Review Accelerator Programme (RAP): Delivered RAP end-to-end in 1.5 months, scaling to 7,000+ sellers, generating $100K revenue, and growing reviews to 524K (+20% YoY). Built key features (sorting, infinite scroll, eligibility tags, bulk enrollment) and launched the Enhanced UI before holiday freeze, onboarding 138 sellers in 24 hours. Expanded RAP to the Supplier domain with 19.5K reviews, becoming Walmart’s first cross-domain application. • Ratings & Reviews: Architected and developed the unified Ratings & Reviews UI aligned with Seller Center guidelines. Improved global usability with CBT localization for Chinese sellers and achieved a 40% YoY adoption rate with 3.5K WAU. • Seller Center Assortment: Built an analytical dashboard using AMCharts, increasing seller interaction and engagement by 25%. • Annle (GenAI Copilot): Designed and built Annle, enabling natural-language data exploration (NL→SQL) and visual insights. Drove adoption through “Quick Questions,” used by 10,000+ associates. Implemented full-screen MFE architecture, CI/CD, SSO, AMCharts, and multi-domain hosting. • Engineering Excellence: Modernized multiple applications to React 18, implemented full-screen MFEs, and strengthened quality through SonarQube (85% coverage), Lighthouse, Mixpanel, Playwright, and Testhub. • Documentation & Knowledge Sharing: Authored core docs for the Seller Center ecosystem, the RAP Architecture (ADT), React 17→18 migration guide, and multi-domain transition. Presented at Walmart Tech Deep Dives and contributed the RML (Reviews using Machine Learning) proposal for Walmart Sparkathon. Tech: ReactJS, TypeScript, AMCharts, Mixpanel, CI/CD, Jest, React Testing Library, Testhub, Playwright, SonarQube, CDN Caching

Senior Technical Consultant at Solulever, Mar 2021 - Jul 2022 · 1 yr 5 mos, Noida, Uttar Pradesh, India, • Developing new user-facing features using React.js as per specified Design wireframes of microservices oriented IoT platform named “Brabo” based on concept of Industry 4.0 which consume gRPC APIs. • Developed the feature of Graphical Representation of data from the PLC’s for the analysis using charting libraries like AMCharts and HighCharts. • Developed & integrated the user interface of cloud connectivity of the product. • Optimized the platforms rendering performance with 50% using the Component-Based-Architecture and Redux-Saga library for synchronous state management. Technology: ReactJs, Redux, Redux-Saga, Reducer, TypeScript, JavaScript, SCSS, HTML, CSS, Kubernetes, Docker.

Software Engineer at Ingenuity Gaming, Jul 2018 - Mar 2021 · 2 yrs 9 mos, Noida, Uttar Pradesh, India, Developing Native Game/ Web App Developer on popular JS library such as Phaser.js using organization’s proprietary framework QUEST. Also worked in Research & Development team of the organization. Technology : HTML5, CSS, Typescript, JavaScript, Python

Research Project Intern at Tata Consultancy Services, May 2017 - Jul 2017 · 3 mos, Kolkata Area, India, Investigating Transport Options for ROS: Analyzed the datagram sent over TCP & UDP in ROS. Worked on bidirectional data exchange over semantic-enabled collaborative robots over UDP using the Constrained Application Protocol (CoAP) and REST API. Technology : Wireshark, Python, Network Protocol.

Education

Bachelor of Technology (B.Tech.), Computer Science, Indian Institute of Technology, Guwahati

High School, PURE SCIENCE, D.A.V. PUBLIC SCHOOL N.I.T. CAMPUS, JAMSHEDPUR

Public links

leetcode: https://leetcode.com/shantanu543

github: https://github.com/shantanu543