Upender Endla
React.js Developer | MERN Stack Specialist
Front-End React Developer with 5+ years of experience engineering scalable, high-performance web applications for global enterprise clients including Kroger, Adidas, and Walmart. Specialized in React.js, Redux, and TypeScript, with full-stack proficiency across the MERN stack (MongoDB, Express.js, React.js, Node.js). Proven track record of architecting reusable component libraries, integrating RESTful and GraphQL APIs, and optimizing application performance across multiple enterprise platforms. Skilled at translating complex business requirements into clean, secure, and maintainable code within Agile/Scrum environments.
Experience
Specialist Programmer
Infosys
Feb 2023 – Present
- Engineered and maintained enterprise-scale, responsive web applications using React and TypeScript, translating complex UI/UX designs into reusable front-end components that streamlined Kroger's internal item onboarding and workflow system.
- Architected modular, scalable UI component libraries using React functional components, hooks, and custom hooks, reducing code duplication and accelerating feature delivery across the team.
- Directed implementation of global state management with Redux and Context API, streamlining user roles, workflow states, and item details across the application.
- Spearheaded integration of RESTful APIs with Axios and Fetch, handling authentication, error states, and request transformations to enable seamless data flow and an enhanced user experience.
- Designed complex form-based workflows with dynamic validations, conditional rendering, and real-time UI updates, improving usability and reducing form-submission errors.
- Enforced TypeScript interfaces and strict typing across the codebase, reducing runtime errors and improving overall code quality.
- Engineered responsive, scalable UIs for Adidas DTB, a global content delivery platform, using React, Redux, Material UI, Bootstrap, and SCSS for wholesale customers and internal teams worldwide.
- Directed integration of RESTful and GraphQL APIs with Axios, enabling secure data handling and efficient content delivery across global and local markets.
- Engineered lazy loading, error boundaries, and performance-optimization techniques, maximizing application speed, cross-browser compatibility, and reliability.
- Championed responsive design and WCAG accessibility standards, ensuring seamless usability across devices and platforms.
- Leveraged AWS services for deployment and scalability, positioning DTB to outperform competitor platforms in content-delivery speed and reliability.
- Engineered Walmart's Event Pricing Application, enabling dynamic, real-time pricing updates for large-scale retail events using React, Redux, Material UI, Bootstrap, SCSS, and Axios.
- Architected responsive, high-performance interfaces optimized for peak traffic through error boundaries, lazy loading, and advanced performance-optimization techniques.
- Partnered with cross-functional backend teams to integrate pricing APIs, ensuring accurate, real-time updates across multiple product categories.
- Diagnosed and resolved performance bottlenecks and UI issues, improving application stability and user experience during high-traffic retail events.
- Delivered a scalable, enterprise-grade solution aligned with Walmart's project timelines and business objectives.
Associate Software Engineer
Zeelog Logistics Solutions Pvt Ltd
Dec 2020 – Aug 2022
- Engineered a reusable component library for Jio's high-traffic digital onboarding portal, ensuring scalable, maintainable front-end code across multiple product teams.
- Designed and implemented a Digital KYC module with advanced form validation, conditional rendering, and secure document upload, delivering an optimized end-to-end user experience.
- Leveraged Redux to manage multi-step onboarding flows, ensuring data persistence and a smooth user experience across form states.
- Upheld best practices in coding, testing, and deployment, delivering high-quality, accessible, cross-browser-compatible interfaces.
Education
VNR VJIET (JNTUH)
B.Tech, Electrical and Electronics Engineering
2018
J.N. Government Polytechnic (JNGP, SBTET)
Diploma, EEE
2015
Skills
Core
JavaScript (ES6+)HTML5CSS3TypeScript
Libraries/Frameworks
React.js (Hooks, Functional Components, Context API)
Full-Stack
MERN Stack (MongoDB, Express.js, React.js, Node.js)
State Management
Redux (Thunk/Saga)Redux Toolkit
UI Frameworks
Material UIBootstrapTailwind CSSSCSS
API Integration
RESTful APIsGraphQLAxiosFetch API
Back-End Technologies
Node.jsExpress.jsPython
Databases & Cloud
MongoDBAWS
Tools & DevOps
GitWebpackJestReact Testing LibraryCI/CDDeployment Pipelines
AI-Assisted Development
GitHub CopilotClaude Code
Methodologies
Agile/ScrumCode ReviewsCross-browser CompatibilityAccessibility (WCAG)
Certifications
- Azure AZ-900 | Microsoft Cloud Fundamentals
- Agile Practitioner | Infosys Internal Certification