You will get Full Stack Web Developer | MERN | Node JS | React JS | MongoDB
Project details
⭐ Every project is unique! Let's discuss your requirements in Upwork Chat first, so I can provide a clear timeline and a fixed price or estimated hours. ⭐
Looking for a scalable, high-performance web application? As a Full Stack Developer, I specialize in building modern, responsive, and secure web apps using the MERN Stack (MongoDB, Express.js, React.js, Node.js). Whether you need a custom web app, API development, I’ve got you covered!
My Full Stack Development Services:
✅ Custom Web Applications – Scalable, fast & fully optimized solutions
✅ MERN Stack Development – MongoDB, Express.js, React.js, and Node.js expertise
✅ Frontend Development – Pixel-perfect, responsive UI with React & Next.js
✅ Backend Development – Secure & efficient APIs with Node.js & Express
✅ Database Management – MongoDB design, optimization & data security
✅ Third-Party API Integration – Stripe, PayPal, CRM, and automation tools
✅ Bug Fixes & Performance Optimization – Faster load times & secure apps
I build robust, high-performance web solutions tailored to your business needs. Let’s discuss your project today—send me a message to get started!
NOTE: Mentioned prices are just a PLACEHOLDER !!!
Looking for a scalable, high-performance web application? As a Full Stack Developer, I specialize in building modern, responsive, and secure web apps using the MERN Stack (MongoDB, Express.js, React.js, Node.js). Whether you need a custom web app, API development, I’ve got you covered!
My Full Stack Development Services:
✅ Custom Web Applications – Scalable, fast & fully optimized solutions
✅ MERN Stack Development – MongoDB, Express.js, React.js, and Node.js expertise
✅ Frontend Development – Pixel-perfect, responsive UI with React & Next.js
✅ Backend Development – Secure & efficient APIs with Node.js & Express
✅ Database Management – MongoDB design, optimization & data security
✅ Third-Party API Integration – Stripe, PayPal, CRM, and automation tools
✅ Bug Fixes & Performance Optimization – Faster load times & secure apps
I build robust, high-performance web solutions tailored to your business needs. Let’s discuss your project today—send me a message to get started!
NOTE: Mentioned prices are just a PLACEHOLDER !!!
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$149
|
Standard
$799
|
Advanced
$2,999
|
|---|---|---|---|
| Delivery Time | 2 days | 15 days | 30 days |
Number of Revisions | 0 | 1 | Unlimited |
Number of Pages | 2 | 10 | 20 |
Design Customization | - | ||
Content Upload | |||
Responsive Design | - | - | |
Source Code |
174 reviews
(170)
(3)
(1)
(0)
(0)
This project doesn't have any reviews.
SS
Sumit S.
Jul 6, 2026
AI Full Stack Developer | Next.js, Node.js, OpenAI, Automation Workflows
I would confidently recommend Talwinder to any client looking for an experienced full-stack developer and would be happy to work with him again on future projects.
Communication was clear and proactive, deadlines were met as mentioned, and he has a solution-oriented mindset.
His technical skills, and reliability made them a valuable part of the project.
Communication was clear and proactive, deadlines were met as mentioned, and he has a solution-oriented mindset.
His technical skills, and reliability made them a valuable part of the project.
AJ
Alice J.
Jun 29, 2026
Senior Full Stack Developer | React.js, Next.js, Node.js, TypeScript, AWS SaaS Expert
If you're looking for a reliable Senior Full Stack Developer with experience in modern JavaScript frameworks, backend development, cloud infrastructure, API integrations, and scalable SaaS applications, I highly recommend working with Talwinder. I would definitely hire him again for future projects.
He demonstrated strong expertise in React.js, Next.js, Node.js, TypeScript, and AWS while delivering a high-quality, scalable SaaS solution. Communication was clear and proactive throughout the project.
He demonstrated strong expertise in React.js, Next.js, Node.js, TypeScript, and AWS while delivering a high-quality, scalable SaaS solution. Communication was clear and proactive throughout the project.
DG
Dharinder G.
Jun 8, 2026
Senior Full Stack Developer | React.js, Next.js, Node.js, TypeScript, AWS, AI Integration
Talwinder is outstanding Senior Full Stack Developer an very quickly he delivered the work. Demonstrated strong expertise in React.js, Next.js, Node.js, TypeScript, AWS, and AI integration. Delivered high-quality, scalable, and responsive solutions with excellent communication. Highly recommended for full-stack web development, cloud applications, SaaS platforms, and AI-powered projects.
DG
Dharinder G.
May 7, 2026
Full Stack AI Developer | LLM, React, Node.js | AI SaaS & Chatbot Development
Worked with an excellent Full Stack AI Developer who demonstrated strong expertise in LLM integrations, React, and Node.js development. He delivered high-quality AI SaaS and chatbot features with clean architecture, responsive communication, and attention to detail. The freelancer was proactive in solving technical challenges, met deadlines consistently, and contributed valuable ideas throughout the project. Highly recommended for AI-powered web applications, chatbot systems, and scalable full-stack development.
SS
Sumit S.
Apr 22, 2026
Full-Stack developer needed for AI-Powered Chatbot with RAG (MERN)
Great experience working with this full-stack AI developer. Strong expertise in AI integrations, automation, and backend/frontend development. Delivered a smooth workflow. Communication was clear, and the project was completed efficiently. Highly recommended for AI-powered solutions, API integrations, and scalable web applications.
About Talwinder
AI Agent & RAG Developer | OpenAI, LLM Apps, AI SaaS | AI Website
100%
Job Success
Nangal, India - 7:53 am local time
If you need an AI agent, RAG system, LLM application, AI chatbot, document Q&A system, knowledge assistant, or AI SaaS feature, I can design and build it end to end — from architecture and AI workflow to backend, integrations, deployment, and optimization.
What I can build for you:
• AI Agents — autonomous workflows, research agents, lead qualification, data analysis, task automation, and multi-step business processes
• RAG Applications — company knowledge bases, document search, SOP/policy assistants, internal knowledge systems, and document Q&A
• LLM Applications — AI copilots, chatbots, summarization, classification, extraction, content generation, and intelligent search
• AI SaaS Products — AI-powered features, dashboards, subscriptions, user management, APIs, and scalable SaaS platforms
• AI Automation — connect AI with your existing tools, APIs, databases, CRMs, and business workflows
• Full-Stack AI Development — Next.js/React frontend, Python/FastAPI or Node.js backend, APIs, databases, Docker, AWS, and production deployment.
AI technologies I work with:
OpenAI, GPT, Claude, LangChain, LlamaIndex, CrewAI, RAG, vector databases, Pinecone, Weaviate, embeddings, AI agents, prompt engineering, function/tool calling, FastAPI, Python, Node.js, Next.js, React, Laravel, AWS, Docker and API integrations.
My approach is focused on business outcomes:
Understand your business workflow, users, data, and desired outcome
Choose the right AI architecture, model, RAG strategy, and tools
Build the AI workflow and full-stack application around your real data
Test accuracy, edge cases, performance, security, and AI costs
Deploy to production and optimize based on real user behavior
I don't treat AI as a separate feature that gets handed over at the end. I build the surrounding product so the AI is actually useful, reliable, and ready for real users.
Why clients choose me:
• $100K+ earned on Upwork
• 236 completed jobs
• 7,300+ hours worked
• 100% Job Success
• Native/Bilingual English
• 0–4 hour average response time
• Available 30+ hours/week
My core focus is AI product development — especially AI agents, RAG systems, LLM applications, AI SaaS, and AI automation.
If you already have a product idea, workflow, documents, API, or existing application, send me the goal and what you want the AI to accomplish. I'll help you choose the right approach and turn it into a production-ready solution.
Thanks,
Talwinder
Steps for completing your project
After purchasing the project, send requirements so Talwinder can start the project.
Delivery time starts when Talwinder receives requirements from you.
Talwinder works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements Gathering
Before starting any development work, I will take the time to understand your requirements in detail.
Development
With your approval of scope, I will begin the development process. This will include Full Stack new development MERN updates / customization & fixes