You will get customized Fullstack App using Next.js, React, Node.js, MongoDB, PostgreSQL
Top Rated
Top Rated
Project details
⭐ Top-Rated Experienced Full-Stack Developer ⭐
I’m a full-stack developer with over 14 years of hands-on experience, helping startups, agencies, and enterprises build scalable, secure, and high-performance digital products. From responsive web applications to cross-platform mobile apps, I deliver end-to-end solutions—covering clean UI, robust backend, and cloud deployment—always with a business-first mindset that aligns technology with real-world goals.
🛠️ What I Do Best
🔹 Front-End Development
• Next.js, React, Angular, JavaScript (ES6+), TypeScript, Tailwind
• Responsive design, cross-browser compatibility
🔹 Back-End Development
• Node.js, Express.js, Django, Python
• REST APIs, authentication, secure architectures
🔹 Database & Cloud Management
• DBs: MySQL, PostgreSQL, MongoDB, Supabase
• AWS, Digital Ocean
💼 Why Clients Love Working With Me
✅ I always focus on solving real business challenges, not just writing code
✅ I bring structure to your project using Agile and Safe Agile practices to save time and cost
✅ Clear updates, fast responses, and delivery that matches your expectations
Let's connect !!
Regards,
Dipanjan
I’m a full-stack developer with over 14 years of hands-on experience, helping startups, agencies, and enterprises build scalable, secure, and high-performance digital products. From responsive web applications to cross-platform mobile apps, I deliver end-to-end solutions—covering clean UI, robust backend, and cloud deployment—always with a business-first mindset that aligns technology with real-world goals.
🛠️ What I Do Best
🔹 Front-End Development
• Next.js, React, Angular, JavaScript (ES6+), TypeScript, Tailwind
• Responsive design, cross-browser compatibility
🔹 Back-End Development
• Node.js, Express.js, Django, Python
• REST APIs, authentication, secure architectures
🔹 Database & Cloud Management
• DBs: MySQL, PostgreSQL, MongoDB, Supabase
• AWS, Digital Ocean
💼 Why Clients Love Working With Me
✅ I always focus on solving real business challenges, not just writing code
✅ I bring structure to your project using Agile and Safe Agile practices to save time and cost
✅ Clear updates, fast responses, and delivery that matches your expectations
Let's connect !!
Regards,
Dipanjan
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, PSD to HTML, DesignWhat's included
| Service Tiers |
Starter
$500
|
Standard
$1,500
|
Advanced
$2,500
|
|---|---|---|---|
| Delivery Time | 14 days | 25 days | 50 days |
Number of Revisions | 2 | 4 | 6 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
15 reviews
(14)
(0)
(0)
(1)
(0)
This project doesn't have any reviews.
JA
Jay A.
Jan 5, 2026
SaaS UX Designer
As always, Dipanjan proves to be a solid find and a great addition to our company long term.
JA
Jay A.
Dec 22, 2025
Full Stack Developer for SaaS Product
Dipanjan is by far the best dev I have met on Upwork. He truly takes ownership of projects and is committed to outstanding outcomes. Looking forward to a long and prosperous partnership.
SA
Saurabh A.
Aug 10, 2024
Senior Architect required for Next.js Project
It was a pleasure working with Dipanjan. He was prompt in responding and had an excellent understanding of full-stack technologies. He went over and above to recommend improvements in my project and we implemented those. I will work with Dipanjan again.
PS
Pedro S.
Jul 25, 2024
I want to create a Job Portal using ReactJs, Tailwind CSS , NodeJs
Dipanjan is a knowledgeable fullstack developer, and I highly recommend him to other clients. He has extensive experience in creating fullstack solution architectures. I will work with him in my future projects as well.
RM
Ryan M.
Jun 14, 2024
Debug Front-End Functionality (JS loading/caching error)
Great working with Dipanjan. He was able to discover the bug in our code and fix it promptly. Complete satisfaction working from this project.
About Dipanjan
Senior AI Full-Stack Developer | React, Next.js, Node.js, Supabase
100%
Job Success
Kolkata, India - 10:48 am local time
🥇 Top-Rated Freelancer
🥇 100% Job Success Score
Hi, I’m Dipanjan—A FullStack AI Developer with 14 years of experience helping startups, agencies, and businesses build scalable web applications, SaaS platforms, dashboards, automation systems, and AI-powered products.
I specialize in combining strong full-stack engineering with practical AI integrations, so your product is not just built well but also smarter, faster, and more automated.
Whether you need a SaaS platform, AI chatbot, voice AI agent, internal dashboard, document-based AI assistant, or custom workflow automation, I can help you take the idea from planning to production.
🧠 AI Development & Automation
I build AI-powered systems that solve real business problems, including the following:
- AI chatbots and assistants using OpenAI, Claude, LangChain, and LlamaIndex
- Retrieval-Augmented Generation / RAG applications for document Q&A and knowledge search
- AI agents for customer support, booking flows, lead handling, and internal operations
- Voice AI agents using Retell AI and Vapi
- CRM, calendar, payment, and third-party API integrations
- Workflow automation using n8n, Make, Zapier, and custom backend logic
- Vector database integrations using Pinecone, FAISS, Supabase Vector, and similar tools
💻 Full-Stack Web Development
I build modern, scalable, and production-ready web applications using:
- Frontend: Next.js, React, TypeScript, Angular, Tailwind CSS, Shadcn UI
- Backend: Node.js, Express.js, Python, Django
- Databases: PostgreSQL, MongoDB, Firebase, Supabase
- APIs: REST, GraphQL, WebSockets
- Authentication: JWT, OAuth, Supabase Auth, Firebase Auth
- Payments: Stripe, PayPal, Square integrations
- Cloud & Deployment: Vercel, AWS, Google Cloud, DigitalOcean, Docker
⚡ AI-Assisted Development, Done Responsibly
I use modern AI coding tools like GitHub Copilot, Claude Code, and Codex to speed up development, reduce repetitive work, and improve delivery efficiency.
However, I do not rely on AI blindly. Architecture, security, performance, database design, business logic, testing, and final code quality are always handled with experienced engineering judgment.
This allows me to move faster while still delivering clean, stable, and maintainable applications.
🔹 Core Expertise
SaaS Development | AI Integration | AI Agents | Voice AI | Retell AI | Vapi | RAG Applications | AI Chatbots | Internal Dashboards | Multi-Tenant Systems | API Integrations | Workflow Automation | CRM Integrations | Authentication | Real-Time Features | Reporting & Analytics | Performance Optimization | Bug Fixing | Production Deployment
💼 Why Clients Hire Me
- 14 years of hands-on development experience
- Strong understanding of both business logic and technical architecture
- Ability to build complete products from frontend to backend
- Practical AI implementation experience, not just prompt experiments
- Clear communication and regular updates
- Focus on scalable, secure, and maintainable solutions
- Experience working with startups, agencies, and international clients
⭐ Highlighted Skills
Next.js | Node.js | React | TypeScript | Supabase | PostgreSQL | MongoDB | Python | Django | OpenAI API | Claude | LangChain | LlamaIndex | RAG | AI Chatbot Development | AI Agents | Retell AI | Vapi | n8n | Make | Zapier | REST API | GraphQL | WebSockets | Stripe | PayPal | Square | AWS | Vercel | Docker | SaaS Development
💬 Let’s Talk
If you’re looking for a developer who can build full-stack applications and integrate AI in a practical, business-focused way, I can help you turn your idea into a real, scalable product.
Let’s build something useful, reliable, and ready for growth.
Regards,
Dipanjan
Steps for completing your project
After purchasing the project, send requirements so Dipanjan can start the project.
Delivery time starts when Dipanjan receives requirements from you.
Dipanjan works on your project following the steps below.
Revisions may occur after the delivery date.
Planning & Design
1. Review requirements and create a project roadmap 2. Design database structure and API endpoints 3. Create wireframes/mockups for the user interface 4. Set up development environment and project repository
Frontend Development
1. Create responsive user interface components 2. Connect frontend to backend APIs (If completed) 3. Implement user interactions and forms 4. Ensure cross-browser compatibility