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
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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
FullStack AI Developer | Next.js, Node.js, Supabase, Agentic AI, RAG
100%
Job Success
Kolkata, India - 11:59 pm local time
I’m a senior full-stack AI integration developer and technical lead with 14 years of experience building scalable SaaS applications, AI-powered platforms, internal tools, automation systems, and customer-facing products.
I work across architecture, frontend, backend, databases, third-party integrations, security, and deployment. This allows me to take ownership of the complete development process—from technical planning and prototyping to production launch and ongoing improvement.
🧠 AI Integration and Automation
I can help you build the following:
• AI agents and chatbots using OpenAI, Claude, LangChain, and LlamaIndex
• RAG assistants that answer questions from documents and business data
• Voice AI agents using Retell AI and Vapi
• Customer support, appointment booking, and lead qualification workflows
• AI tools connected to CRMs, calendars, payment systems, and internal APIs
• n8n, Make, Zapier, and custom workflow automations
• Response validation, fallback handling, citations, and human escalation flows
💻 SaaS and Full-Stack Development
I build and improve:
• Multi-tenant SaaS platforms
• Next.js and React applications
• Supabase and PostgreSQL backends
• Dashboards, portals, marketplaces, and administration systems
• Subscription and payment workflows using Stripe, Square, and PayPal
• Authentication, permissions, RLS policies, and role-based access
• REST APIs, GraphQL APIs, webhooks, and real-time features
• Production deployments using Vercel, AWS, Docker, and cloud infrastructure
🔍 Production Reviews and Migrations
I also help founders and teams improve applications created with AI coding tools, low-code platforms, or previous development teams.
This can include:
• Architecture and scalability reviews
• Security and database audits
• Supabase RLS validation
• Codebase cleanup and bug fixing
• Performance optimization
• Lovable-to-Supabase or Vercel migrations
• Deployment and production-readiness reviews
Why clients work with me:
• 14 years of hands-on engineering experience
• Complete frontend-to-backend product ownership
• Strong understanding of business workflows and architecture
• Practical production experience with AI—not only prototypes
• Clear communication and structured progress updates
• Focus on security, maintainability, and long-term scalability
Core stack: Next.js, React, TypeScript, Node.js, Python, Supabase, PostgreSQL, MongoDB, OpenAI, Claude, LangChain, Retell AI, Vapi, n8n, Stripe, PayPal, AWS, Vercel, and Docker.
AI Coding Tools: Claude Code, Codex, Copilot, Cursor
Vibe Coding Platform: Lovable, Replit, Base44
Tell me what you are building, your current technology stack, and the main technical challenge. I’ll help you identify the safest and most efficient path to production.
Thanks,
Dipanjan Dutta
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