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English
$
USD
I will be ai saas web app mern stack developer
Mithun
Level 1
5.0
5.0
About this gig
Are you looking for an expert AI SaaS developer and MERN stack developer? You are at the right place.
I am a professional MERN stack developer with 5+ years of experience building AI SaaS platforms and full stack web apps using MongoDB, PostgreSQL, Next JS, React JS, and Node JS, Express JS.
- AI SaaS Web App (MERN + AI Integration)
- MERN Stack Web App Development
- OpenAI / ChatGPT Integration
- AI Chatbot with LangChain
- REST API & Third-Party API Integration
- SaaS Platform with Subscription & Payment
- JWT / OAuth Authentication System
- Cloud Deployment (AWS, Vercel, Render)
- Admin Panel & Dashboard Development
Tech: React JS | Next JS | Nest JS | Node JS | Express JS | MongoDB | PostgreSQL | OpenAI API | LangChain | Tailwind CSS
WHY CHOOSE ME?
- 5+ Years MERN Stack & AI SaaS Experience
- 50+ Projects Delivered Successfully
- 100% Client Satisfaction
- Clean, Scalable & Well-Documented Code
- Regular Updates & Free Consultation
Message me before placing an order. Let's build your AI SaaS or MERN stack web app together!
Get to know Mithun
Mithun
Senior Full Stack Developer AI SaaS, MVP and AI Agent Expert
Level 1
- FromBangladesh
- Member sinceOct 2019
- Avg. response time1 hour
- Last delivery5 months
Languages
Bengali, English
Long-term partner for startups, founders, and agencies build AI-powered products, automate workflows, and launch scalable SaaS platforms.
Our expertise includes AI agents, AI automation, custom web applications, internal business tools, and white-label development. Using modern technologies like Next.js, NodeJS, Python, OpenAI, Claude and so on, we turn ideas into production-ready solutions.
My Portfolio
FAQ
What size of project can you handle?
I can handle projects of any size, from small-scale applications like landing pages to full-fledged platforms with complex features such as user authentication, payment integrations, real-time messaging, and more. Let’s discuss your requirements to ensure I can deliver what you need.
Are you a MERN Stack Developer?
Yes, I’m an experienced MERN Stack Developer specializing in MongoDB, Express.js, React.js, and Node.js for fast, scalable, and modern web applications.
Price is negotiable for website development or fixing bugs?
Yes, Price is negotiable and it will be depend on complexities and features of website.
Can you assist me with services like deploy or purchasing Domain Hosting ?
Yes, I can help you with that if you want to buy any of those services from another place or you can buy from me where I can give you better service with 6 months of free maintenance cost.
Can you deploy mern or nextjs app in any server ?
Yes, I can assist you to deploy your app besides fixing bugs
Do you also provide domain, hosting services?
Yes I also provide domain, hosting service, if you want to buy your desire hosting plan with your dream domain please contact with me I will provide you best and fastest web services.
Are you available to do convert the PSD with responsive design ?
Yes, I am available.
Are you Tailwind css Expert ?
Yes, I am very good at Tailwind CSS
can you convert any figma/psd/xd file into react or nextjs app or mern app?
Yes, I can do this.
Can you help with an existing project?
Yes, I can assist with existing projects by debugging, adding features, or improving the codebase. Please share your project details before placing an order.
Reviews
29 reviews for this Gig
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| (0) | ||
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
A avi990
United States
Great work by this team. They understood all the requirements very precisely and completed the project as per my expectations. I would highly recommend them for anyone willing to build websites.
$600-$800
Price
7 weeks
Duration
M 
Seller's Response
Helpful?B bin_muaz23
Germany
10/10 – Amazing Experience! Working with Mithun and his team was honestly one of my best experiences on Fiverr. They delivered my MERN stack project way beyond what I expected. Not only did they understand my requirements clearly, but they also gave valuable suggestions that really improved my SaaS...
$50-$100
Price
4 days
Duration
M Seller's Response
Helpful?B 
baltim
United Kingdom
I had an excellent experience working with Mithun and his developer team. From the very beginning, their communication was clear, professional, and proactive. They took the time to fully understand the requirements, asked the right questions, and provided valuable suggestions that improved the overall...
$100-$200
Price
2 days
Duration
M Seller's Response
Helpful?J jay_rice_gpc
United States
Mithun has been a dependable and skilled developer on my project. He communicates clearly, meets deadlines, and demonstrates strong technical ability across the stack. I’ve appreciated his problem-solving approach, adaptability, and willingness to collaborate on refining requirements. He consistently...
$1,500-$2,000
Price
7 weeks
Duration
M Seller's Response
Helpful?J 
jimenagld
United Kingdom
From the start Mithun showed quick response to all of my request, and exceed my expectations in every way. The final code not only matched my design perfectly but included thoughtful improvements I hadn't considered. I would definitely hire Mithun again for future projects.
$800-$1,000
Price
7 weeks
Duration
M Seller's Response
Helpful?
Reviews
29 reviews for this Gig
| (29) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
A avi990
United States
Great work by this team. They understood all the requirements very precisely and completed the project as per my expectations. I would highly recommend them for anyone willing to build websites.
$600-$800
Price
7 weeks
Duration
M Seller's Response
Helpful?B bin_muaz23
Germany
10/10 – Amazing Experience! Working with Mithun and his team was honestly one of my best experiences on Fiverr. They delivered my MERN stack project way beyond what I expected. Not only did they understand my requirements clearly, but they also gave valuable suggestions that really improved my SaaS...
$50-$100
Price
4 days
Duration
M Seller's Response
Helpful?B baltim
United Kingdom
I had an excellent experience working with Mithun and his developer team. From the very beginning, their communication was clear, professional, and proactive. They took the time to fully understand the requirements, asked the right questions, and provided valuable suggestions that improved the overall...
$100-$200
Price
2 days
Duration
M Seller's Response
Helpful?J jay_rice_gpc
United States
Mithun has been a dependable and skilled developer on my project. He communicates clearly, meets deadlines, and demonstrates strong technical ability across the stack. I’ve appreciated his problem-solving approach, adaptability, and willingness to collaborate on refining requirements. He consistently...
$1,500-$2,000
Price
7 weeks
Duration
M Seller's Response
Helpful?J jimenagld
United Kingdom
From the start Mithun showed quick response to all of my request, and exceed my expectations in every way. The final code not only matched my design perfectly but included thoughtful improvements I hadn't considered. I would definitely hire Mithun again for future projects.
$800-$1,000
Price
7 weeks
Duration
M Seller's Response
Helpful?
