Hi, I'm
Umangi
Prajapati
Frontend Developer
Building scalable, high-performance web experiences with React, Next.js and AEM Cloud.
4.5+
Years of Experience
California
San Jose
✅
Open to Work
4.5+
Years of Experience
California
San Jose
✅
Open to Work
I turn complex requirements into clean, maintainable code.
Frontend Developer with 4.5+ years of experience building scalable, high-performance web applications using React.js, Next.js, and AEM Cloud. Skilled in implementing server-side rendering (SSR), lazy loading, and optimizing page performance. Proficient in developing reusable UI components, optimizing APIs, and creating responsive, accessible interfaces that enhance user experience.
Senior Frontend Developer
Optum
San Jose, CA · Remote
- Refactored and modularized legacy code, reducing technical debt by 20% and improving maintainability
- Built and maintained scalable UI components using Next.js and AEM Cloud
- Improved page load times by 15% through server-side rendering (SSR), lazy loading, and caching strategies
- Collaborated with cross-functional teams, ensuring 100% on-time delivery of projects
- Conducted code reviews, mentored junior developers, and enforced best practices to uphold high code quality
- Implemented Playwright for robust end-to-end testing, enhancing application stability and reliability
- Integrated GraphQL APIs to optimize data fetching
- Managed complex AEM Cloud integrations, streamlining content workflows and dynamic user experiences
- Enhanced CI/CD pipelines using Git
Software Developer
Bank of America
Addison, TX · Remote
- Developed and maintained enterprise banking web applications using React.js, JavaScript, HTML5, CSS3, and Redux
- Built reusable UI components and improved frontend consistency across multiple workflows
- Integrated REST APIs and collaborated with microservices teams to enhance performance and data reliability
- Enhanced UI performance and accessibility while following enterprise security and compliance requirements
- Worked in Agile sprints using Jira/Rally and supported CI/CD pipelines with Git, GitHub, and Jenkins
Junior Full Stack Developer
Idexcel
Herndon, VA
- Built SPAs using ReactJS and Tailwind CSS, enhancing UI responsiveness by 20%
- Integrated Context API for state management, improving global data synchronization
- Improved client satisfaction by 95% by collaborating with UX teams to refine the user experience
UI React Developer Trainee
Baanyan Software Services
New Jersey · Remote
- Developed responsive user interfaces using React.js, ensuring cross-browser compatibility
- Implemented frontend logic with Redux, maintaining clean and efficient code
- Collaborated with UX/UI designers to translate design mockups into functional components
- Created wireframes and transformed them into reusable UI components using React.js
Web Developer
i3 Infotech
Surat, Gujarat, India · On-site
- Worked on React JS framework to develop Single Page Applications
- Collaborated with stakeholders to deliver website updates and progress reports
- Implemented stable React components and stand-alone functions for future pages
- Ensured web application responsiveness using Bootstrap and CSS Media Queries
Auriq AI — AI Chatbot
Full-stack AI chatbot with real-time streaming responses using OpenAI GPT-4o-mini and Next.js App Router. Features intent-based routing to specialized agents for weather, math, coding, and jokes, plus multi-session chat management with IndexedDB persistence.
- Real-time streaming responses with OpenAI GPT-4o-mini
- Multi-chat system with persistent history via IndexedDB
- Smart intent detection for weather, math, coding, jokes, and advice
- Mobile-responsive UI with light/dark theme toggle
- KaTeX math rendering and hydration-safe SSR components
RoleFit AI — Resume Alignment Tool
AI-powered resume tailoring tool that aligns resumes with job descriptions while enforcing strict no-fabrication rules. Built with Next.js App Router and OpenAI GPT-4o for intelligent rewriting, keyword matching, and ATS optimization.
- Upload resume (.docx) or paste text with intelligent parsing using Mammoth
- AI-powered rewriting with strict no-fabrication constraints
- Keyword matching system highlighting matched and missing skills
- Alignment scoring with before vs after comparison
- Multiple focus modes: ATS Optimized, Impact Focused, Balanced, Concise
- DOCX export with formatted output using docx + file-saver
- Session persistence using sessionStorage
- Responsive UI with dark/light mode and multi-step workflow UX
2021
User Behavior Prediction — Web Log Mining
A predictive analytics application built to forecast future item sales based on historical data, page hit reports, and exit page tracking.
2020
Dogmates — Flutter App
A mobile application for dog owners covering breed information, event listings, veterinary clinic locations, accessories shopping, and grooming session locators.
2019
North County Climate Change Alliance — Website
A nonprofit event-management website built for the North County Climate Change Alliance.
2018
Cloud Marketing with Image Processing
An online shopping platform using image processing to intelligently filter and surface products.
2017
Face Recognition & Password Authentication
An Android app providing biometric security using facial recognition as a login password.
2015
Online Voting System
A digital voting application allowing citizens to vote for their preferred political party from anywhere.
← Drag to scroll →
Hands-On AI: Build an AI Chatbot with GPT-4o and Next.js
Covers building a production-ready AI chat app with Next.js and OpenAI GPT models, including conversation threading, message persistence, and real-time streaming responses.
View Certificate ↗Integrating Generative AI into JavaScript Web Projects
Teaches how to integrate OpenAI APIs into JavaScript web apps, covering chat completions, function calling, and building AI-powered virtual assistants.
View Certificate ↗What is GenAI
An introductory course explaining what Generative AI is, how it differs from traditional machine learning, and how it creates new content like text, images, and code.
View Certificate ↗HackerRank
2026CSS Certificate
Validates proficiency in CSS fundamentals including cascading and inheritance, text styling, layout techniques, and the box model.
View Certificate ↗HackerRank
2026JavaScript (Intermediate) Certificate
Assesses knowledge of advanced JavaScript concepts including design patterns, memory management, concurrency models, and event loops.
View Certificate ↗HackerRank
2026Software Engineer Certificate
A role-based certification validating proficiency in problem-solving, SQL, and REST APIs — core skills expected of software engineers.
View Certificate ↗HackerRank
2026REST API Certificate
Covers retrieving and processing data from APIs using parameters and pagination, validating hands-on REST API integration skills.
View Certificate ↗HackerRank
2026React JS Certificate
Validates React skills including basic routing, rendering elements, state management, event handling, ES6 syntax, and form validation.
View Certificate ↗HackerRank
2026JavaScript Specialist Certification
An advanced JavaScript certification covering functions, hoisting, scope, inheritance, events, error handling, and core language concepts.
View Certificate ↗HackerRank
2026Frontend Developer (React) Certificate
A role-based certification covering React, JavaScript, and CSS — validating the complete skill set expected of a frontend developer.
View Certificate ↗Johns Hopkins University (Coursera)
2021Front End Web Development
Covers building responsive, interactive websites using HTML5, CSS3, and JavaScript, including responsive design, Ajax, and DOM manipulation.
View Certificate ↗University of Michigan (Coursera)
2020Using Python to Access Web Data
Focuses on accessing and processing web data using Python, including API integration, JSON/XML parsing, and web scraping techniques.
View Certificate ↗12 certifications
I have received recommendations from colleagues and managers I've worked with. You can read them directly on my LinkedIn profile.
View Recommendations on LinkedIn ↗2019 – 2021
Master's in Computer Science
California State University San Marcos
📍 San Marcos, CA, USA
GPA: 3.4/4.0
Aug 2014 – May 2018
Bachelor's in Computer Engineering
Gujarat Technological University
📍 Gujarat, India
GPA: 7.76/10
Let's build something great together.
I'm currently open to new opportunities. Whether you have a role, a project, or just want to say hi 👋, my inbox is always open.