Hi, I’m Vaibhav, a Software Web & Mobile App Developer who helps startups and founders build FAST, SCALABLE, and PRODUCTION ready SaaS applications.
If you’ve used tools like Lovable, Claude, Cursor, or Replit to build your MVP but now it’s breaking, messy, or hard to scale… Turn AI-generated MVPs into real, production-ready systems.
If you’re looking for a developer who can:
- Build a high-converting SaaS dashboard
- Turn designs into pixel-perfect, blazing-fast UI
- Ship an MVP that’s SEO-ready, scalable, and cleanly architected
- Collaborate like a product-focused engineer (not just a coder)
You’re in the right place.
I specialize in SaaS development where performance, UX, and scalability matter — not just making it work.
What I Offer:
- High-Converting SaaS Dashboards: I specialize in building dashboards that not only look great but also drive conversions.
- Pixel-Perfect UI: Transforming designs into blazing-fast, responsive, and SEO-ready interfaces is my forte.
- Scalable Architecture: I ensure your applications are cleanly architected for scalability and performance.
✅ SaaS Frontend, Backend & Dashboards
- React.js & Next.js, Vue3
- Server-Side Rendering (SSR), Static Generation (SSG)
- SEO-optimized pages for real traffic & conversions
- Admin panels, analytics dashboards, internal tools
✅ Modern UI & UX Engineering
- Tailwind CSS, ShadCN UI, Framer Motion
- Smooth animations, responsive layouts
- Pixel-perfect implementation from Figma
- Clean component architecture (reusable & scalable)
✅ API & Backend Integration
- REST & GraphQL API integration
- Node.js, Express, NestJS, FastAPI (when needed)
- Authentication flows (JWT, OAuth)
- Real-time features (WebSockets)
✅ CMS & SaaS Integrations
- Headless CMS (Sanity, Strapi, Contentful)
- Supabase, Firebase ( Backend as a service )
- Payment systems, subscriptions, third-party APIs
- Analytics, monitoring, and performance tracking
✅ Why Clients Choose Me:
SaaS Expertise: I understand the nuances of SaaS products, delivering clean, modular, and maintainable code.
Technical Proficiency: Proficient in React.js, Next.js, Tailwind CSS, and Node.js, I build frontend systems that are both intuitive and professional.
Product-Focused Collaboration: I work closely with clients to ensure their applications meet business goals and user needs.
What I bring:
1. Product-thinking mindset
2. Clean, modular, scalable codebase architecture
3. Clear communication & reliable delivery
4. UI that feels fast, intuitive, and professional
I don’t just build ONLY screens, I engineer FRONTEND systems that scale with your business.
🛠️ Tech Stack (SEO-Friendly)
Frontend:
React.js, Next.js (App Router), TypeScript, Vue.js, Nuxt.js, Astro
Tailwind CSS, ShadCN UI, Zustand, Redux Toolkit, React Query
Framer Motion, Chart.js, Recharts, Axios
Backend (Integration):
Node.js, Express.js, NestJS, FastAPI
Database:
PostgreSQL, MongoDB, Supabase, Redis
Dev & Deployment:
Vercel, Docker, CI/CD, GitHub Actions
🤝 How I Work:
1. Understand your product & users
2. Propose a clear technical approach
3. Build a clean, scalable frontend architecture
4. Ship fast with production-ready quality
5. Support iteration, scaling, and improvements
I’m comfortable working:
- As a solo developer
- With your existing team
- Or alongside designers, backend engineers, and founders
Let’s Chat:
📩 Send me a message with your idea — I’ll tell you the best way to build it.
JavaScript
Web Development
React
SaaS Development
Ecommerce Website Development
Website & CMS Bug Fix
ChatGPT API Integration
API Integration
Node.js
OpenAI API
AI Chatbot
React Native
Vue.js
Python
Firebase
Firebase Cloud Firestore
Firebase Realtime Database
Supabase
Vercel
Claude
Rachit V.
Mohali, India
$30/hr
4.8
123 jobs
I'm a Full Stack Developer with 12+ years of experience, 112 jobs completed and 16,000+ hours delivered on Upwork, holding a 4.8 rating and Top Rated Plus status.
My experience includes working with clients like 𝐑𝐚𝐧𝐝 𝐌𝐜𝐍𝐚𝐥𝐥𝐲, 𝐒𝐨𝐜𝐢𝐚𝐥 𝐇𝐏, 𝐒𝐚𝐢𝐧𝐝𝐞𝐱, and 𝐂𝐚𝐬𝐞𝐔𝐩.
I build production-ready SaaS platforms, web applications, and Chrome extensions — not prototypes. Every system I ship is built to be reliable, secure, and scalable long-term.
🚀 Full Stack Development
◾ SaaS platforms & web apps: React, Vue.js, Next.js, Node.js, Laravel
◾ Custom Chrome extensions & browser-based tools
◾ REST API integrations, webhooks, microservices
◾ Payment & CRM integrations: Stripe, GoHighLevel (GHL)
◾ Databases & cloud infrastructure: PostgreSQL, MongoDB, MySQL, AWS (S3, RDS, Lambda), GCP
🤖 AI & Automation, When It's the Right Fit
I also integrate AI into existing systems where it genuinely adds value — connecting OpenAI, Twilio, Vapi, and Retell to automate lead qualification, customer support, and internal workflows. I'll always give honest guidance on whether an AI-driven solution or a simpler traditional build is the right call for your project.
🛠 Tech Stack
◾ React, React Native, Next.js, Vue.js, Angular, Node.js, Nest.js
◾ Laravel, PHP, Python
◾ MongoDB, PostgreSQL, AWS, GCP, Stripe, GoHighLevel
◾ OpenAI API, Twilio, Vapi, Retell
🚀 Why Work With Me
◾ Top Rated Plus with a 4.8 rating across 112 completed jobs
◾ Clean architecture, security-first code, easy to maintain or hand off
◾ Clear communication, honest project guidance, deadlines hit
◾ Long-term partnership mindset, not one-off gigs
💌 Let's Build Something That Works
Message me with your project details, or click "Invite to Job" to get started.
Keyword Footer
Full Stack Developer | SaaS Developer | Web App Development | Node.js Developer | React Developer | Next.js Developer | Vue.js Developer | Laravel Developer | Chrome Extension Developer | REST API Integration | Microservices | Stripe Integration | GoHighLevel Developer | AWS | Google Cloud Platform | PostgreSQL | MongoDB | AI Integration | OpenAI API | Twilio | Voice Agent Developer
Full-Stack Development
Twilio API
Node.js
Angular
React
Laravel
Next.js
SaaS
HighLevel
Electron
Vue.js
MEAN Stack
MERN Stack
Google Chrome Extension
n8n
WordPress
AI Agent Development
API
PHP
Lokesh D.
Raisen, India
$25/hr
5.0
3 jobs
Need a secure Chrome Extension to automate workflows or a scalable SaaS platform built from scratch?
I don't just write code; I architect complete digital products. I specialize in bridging the gap between browser environments and robust backend systems. Whether you are a founder building a new B2B SaaS, or a business needing a complex Manifest V3 Chrome Extension to streamline operations, I deliver secure, scalable, and premium solutions.
Why clients choose me for complex builds:
Chrome Extension Architect: I build secure, stealthy, and highly functional extensions using Manifest V3. From DOM parsing and API bridges to background service workers, I ensure they are bug-free, robust against dynamic web pages, and Chrome Store compliant.
End-to-End SaaS Developer: I build the whole system. I connect the front-end dashboard to secure backend databases, handle user authentication (OAuth), and set up real-time data synchronization.
Premium UI/UX Edge: Even heavy data applications should feel buttery-smooth. Because of my strong background in React, Tailwind, and GSAP, I ensure your SaaS doesn't just work perfectly—it looks like a million-dollar enterprise product.
Strategic Problem Solver: I don't just blindly follow instructions. I proactively suggest architecture improvements, security fixes, and UI enhancements to make your product better.
My Core Tech Stack:
Browser Extensions: Chrome API, Manifest V3, Content Scripts, Service Workers, DOM MutationObservers
Frontend: React.js, Next.js, TypeScript, Tailwind CSS, SCSS
Backend & SaaS: Supabase (PostgreSQL), Firebase (Auth, Firestore), REST APIs, OAuth, Webhooks
Premium UI (When needed): GSAP, Framer Motion
Recent Project Highlights:
Architected ClipSync, a complete micro-SaaS consisting of a Manifest V3 Extension and a Next.js Web App that securely synchronizes clipboard data across devices using Google OAuth and Firebase.
Engineered a private, stealth B2B Chrome Extension for enterprise lead extraction, utilizing passive DOM parsing to bypass strict bot-detection limits.
Ready to build a reliable, polished product? Click "Invite to Job" and let's discuss your architecture.
JavaScript
Google Chrome Extension
Browser Extension
React
Next.js
TypeScript
Web Design
Firebase
Tailwind CSS
HTML
GSAP
User Authentication
SaaS
Stripe
Web Application
Adarsh K.
Kangra, India
$20/hr
4.7
32 jobs
🤝I'm a skilled full stack developer with experience in a variety of technologies, especially JavaScript frameworks. I work with ReactJS, NodeJS, VueJS, NextJS, and ExpressJS. I focus on paying attention to every detail and making sure my work is of the highest quality. My goal is always to provide reliable, efficient solutions that meet or exceed what my clients expect.
Why Choose Me?
🟢 I have hands-on experience in building projects from scratch as well as maintaining and enhancing existing ones. No matter the stage of your project, I'm here to help it succeed.
🟢 Need someone who can work with your schedule? I'm flexible with any time zones
🟢 Your success is my top priority. I love tackling challenges and finding innovative solutions to meet your project's needs.
🟢 I believe in building great working relationships. My approach is professional yet friendly, making collaboration enjoyable and productive.
🦾 Key Skills:
Front-end: JavaScript, TypeScript, React, ReactQuery, Redux, Redux Toolkit, Bootstrap, npm, CSS3 (Sass), HTML5 (Flexbox, Grid), React Native Expo, Vue (courses and pet project)
Design: Figma, pixel-perfect, Material UI, Tailwind, CSS Modules, Styled-Components
Back-end: Next.js, Node.js, Express, PHP, Laravel
Databases: MySQL, Supabase, MongoDB
Methodologies and tools: git (GitHub), GitLab
Cloud: Amazon Web Services (EC2)
Hosting: Vercel, GitHub pages, Heroku, Netlify, Railway
CMS: Payload
🤙 Let's Work Together!
React
Node.js
Vue.js
Next.js
Nuxt.js
NestJS
HTML
CSS 3
Bootstrap
ExpressJS
Sobindra P.
Saharanpur, India
$10/hr
5.0
6 jobs
👋 Hi there!
We are a passionate team of 15 experienced developers specializing in creating powerful Chrome extensions, especially those that integrate seamlessly with Facebook and Instagram APIs. With a strong track record of successfully developing 150+ Chrome extensions, we bring deep expertise, creativity, and reliability to every project.
🔹 Our specialties include:
Chrome Extensions Development
Facebook and Instagram API Integration
Custom Web Applications
We take pride in delivering high-quality, scalable solutions that meet our clients' exact needs. Whether you need a simple tool or a complex platform, we have the skills and experience to bring your idea to life.
Let’s build something amazing together! 🚀
Browser Extension
Google Chrome Extension
Pankaj S.
Yamuna Nagar, India
$10/hr
5.0
33 jobs
🥇 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 | 𝟏𝟓+ 𝐘𝐞𝐚𝐫𝐬 𝐨𝐟 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 | 𝟓-𝐒𝐭𝐚𝐫 𝐑𝐚𝐭𝐢𝐧𝐠 | 𝟏𝟎𝟎% 𝐉𝐨𝐛 𝐂𝐨𝐦𝐩𝐥𝐞𝐭𝐢𝐨𝐧 𝐑𝐚𝐭𝐞 🥇,
𝐀𝐛𝐨𝐮𝐭 𝐌𝐞:
I am a Full Stack Developer & AI/ML Engineer with 15+ years of hands-on experience delivering high-quality, scalable, and secure web & mobile applications.
I specialize in MERN Stack, Next.js, Python/Django, Chrome Extensions, and AI/ML-powered solutions. My focus is not just writing code—but building production-ready systems that solve real business problems and scale with growth.
I work closely with clients to understand requirements, propose the right architecture, and deliver clean, maintainable, and future-proof solutions.
✅ 𝐂𝐨𝐫𝐞 𝐂𝐨𝐦𝐩𝐞𝐭𝐞𝐧𝐜𝐢𝐞𝐬
𝐌𝐄𝐑𝐍 & 𝐍𝐞𝐱𝐭.𝐣𝐬: MongoDB, Express.js, React.js, Node.js, Next.js
𝐏𝐲𝐭𝐡𝐨𝐧 & 𝐃𝐣𝐚𝐧𝐠𝐨: Scalable backend & API development
𝐀𝐈 / 𝐌𝐋 & 𝐂𝐥𝐨𝐮𝐝: GCP, Vertex AI, Agent Building, LangChain, Hugging Face, OpenAI
𝐌𝐨𝐛𝐢𝐥𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: React Native, Expo, React Native Paper
𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬: MySQL, MongoDB, PostgreSQL, Oracle PL/SQL
𝐂𝐡𝐫𝐨𝐦𝐞 𝐄𝐱𝐭𝐞𝐧𝐬𝐢𝐨𝐧𝐬: Custom browser extensions & automation tools
📈 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐚𝐛𝐥𝐞𝐬
- Full-Stack Web Applications with API & database integration
- AI/ML Solutions: Intelligent agents, chatbots, recommendation systems
- Cloud AI Implementations: Vertex AI model deployment & automation
- Mobile Apps: Cross-platform apps using React Native & Expo
- Chrome Extensions: Productivity, automation & data-driven extensions
- Database Architecture: Secure, optimized, and scalable designs
- UI/UX Development: Responsive, modern, and intuitive interfaces
- API Development & Integration: REST, SOAP & custom APIs
🛠️ 𝐖𝐡𝐲 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞
✔️ Top Rated Freelancer with proven delivery history
✔️ AI-Driven Expertise using the latest tools & frameworks
✔️ Reliable & Communicative – clear updates and fast responses
✔️ 100% Job Completion & 5-Star Feedback
✔️ Long-Term Mindset – I aim to become your trusted tech partner
✨ 𝐀𝐝𝐝𝐢𝐭𝐢𝐨𝐧𝐚𝐥 𝐏𝐞𝐫𝐤𝐬
- Free Post-Delivery Support for code-related issues
- Quick Communication & availability across time zones
- Strict Security & Data Privacy guaranteed
🚀 Let’s build something powerful together.
If you’re looking for a reliable developer who understands both technology and business, I’d be happy to discuss your project and help bring your ideas to life.
Warm Regards,
Pankaj Sharma
JavaScript
React
Next.js
MongoDB
Node.js
Redux
AI Agent Development
Google Chrome Extension
Stripe
AWS Development
Mongoose
Python
Vercel
Chrome OS
Web Application Development
Full-Stack Development
AI App Development
AI Trading
Automation
SaaS Development
How it works
Post a job for freePost a job
Tell us what you need. Create your own job post or generate one with AI then filter talent matches.
Hire top talent fast
Consult, interview, and hire quickly, so you can meet the freelancers you're excited about.
Collaborate easily
Use Upwork to chat or video call, share files, and track project progress right from the app.
Payment simplified
Manage payments in one place with flexible billing options. Only pay for approved work, hourly or by milestone.
Don't just take our word for it
“Upwork provides an umbrella-level of security. I can see a talent’s work history and ratings. I can hold payments in escrow. I can communicate through Upwork Messages instead of working through my email address.”
KD
Kim Darling
Emerald Tiger
“Upwork is the best platform to hire skilled professionals when we're not looking for a full-time employee. All the companies in our portfolio use Upwork to find talent across a wide range of fields.”
DM
David Merry
Kinetic Investments
“Our very specific requirements can be a challenge—With Upwork, we’re able to access a bigger community to ensure the success of our projects.”
KK
Katja Krohn
Summa Linguae
How do I hire a Ext JS Specialist in India on Upwork?
You can hire a Ext JS Specialist in India on Upwork in four simple steps:
Create a job post tailored to your Ext JS Specialist project scope. We'll walk you through the process step by step.
Browse top Ext JS Specialist talent on Upwork and invite them to your project.
Once the proposals start flowing in, create a shortlist of top Ext JS Specialist profiles and interview.
Hire the right Ext JS Specialist for your project from Upwork, the world's largest work marketplace.
At Upwork, we believe talent staffing should be easy.
How much does it cost to hire a Ext JS Specialist?
Rates charged by Ext JS Specialists on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.
Why hire a Ext JS Specialist in India on Upwork?
As the world's work marketplace, we connect highly-skilled freelance Ext JS Specialists and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream Ext JS Specialist team you need to succeed.
Can I hire a Ext JS Specialist in India within 24 hours on Upwork?
Depending on availability and the quality of your job post, it's entirely possible to sign up for Upwork and receive Ext JS Specialist proposals within 24 hours of posting a job description.