You will get Expert MERN Stack Developer for Web Applications and SaaS Development
Project details
Are you looking for a seasoned MERN stack developer to bring your web application idea to life? Look no further! I specialize in creating dynamic and interactive web applications tailored to your unique requirements.
šš”šš ššØš®'š„š„ ššš:
-- A beautifully designed and fully functional web application
-- Clean and maintainable code adhering to industry best practices
-- Responsive design for seamless user experience across devices
-- Thorough testing to ensure optimal performance and security
šš¤š¢š„š„š¬:
ā¢ MongoDB, Express.js, React, Node.js, Single Page Applications, RESTful API Development, RESTful API Development, State Management, Testing and Debugging
ā¢ Using containerization tools like Docker for seamless deployment and scalability.
ā¢ Implementing version control using Git for collaborative development and codebase management.
I am committed to delivering high-quality work within specified timelines. Let's collaborate to turn your vision into reality. Contact me today to discuss your project!
šš”šš ššØš®'š„š„ ššš:
-- A beautifully designed and fully functional web application
-- Clean and maintainable code adhering to industry best practices
-- Responsive design for seamless user experience across devices
-- Thorough testing to ensure optimal performance and security
šš¤š¢š„š„š¬:
ā¢ MongoDB, Express.js, React, Node.js, Single Page Applications, RESTful API Development, RESTful API Development, State Management, Testing and Debugging
ā¢ Using containerization tools like Docker for seamless deployment and scalability.
ā¢ Implementing version control using Git for collaborative development and codebase management.
I am committed to delivering high-quality work within specified timelines. Let's collaborate to turn your vision into reality. Contact me today to discuss your project!
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, PSD to HTML, DesignWhat's included
| Service Tiers |
Starter
$150
|
Standard
$799
|
Advanced
$4,999
|
|---|---|---|---|
| Delivery Time | 1 day | 7 days | 29 days |
Number of Revisions | Unlimited | Unlimited | Unlimited |
Number of Pages | 1 | 5 | 10 |
Design Customization | - | ||
Content Upload | - | - | |
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$100 - $300
Design Customization
(+ 2 Days)
+$100
Content Upload
(+ 3 Days)
+$20Frequently asked questions
7 reviews
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MK
Mr M B K.
Aug 22, 2026
Fix AI Agent Message Response Issue - Nodejs, Nextjs & OpenAI
Really impressed with the work. The issue was identified quickly, and the fix was handled with a thoughtful approach. Communication was easy throughout the project, and everything was completed on time with great attention to detail. The final result exceeded expectations, and Iād gladly work together again.
MK
Mr M B K.
Aug 18, 2026
AI SaaS project bug fixing
I had a great experience working with Mithun. He understood the project requirements quickly and handled the AI SaaS development and bug fixes with a strong understanding of both frontend and backend development. He was easy to communicate with, paid attention to the details, and made sure everything was working properly before wrapping things up. I really appreciated his approach to solving problems and keeping the project moving forward. Iād be happy to work with him again on future projects.
MK
Mr M B K.
Aug 12, 2026
Full Stack Mern Developer - React/Nextjs, Nodejs, ExpressJs, MongoDb/PostgreSQL
Great experience working with Mithun on our AI hiring SaaS platform. He handled full-stack development, automated interviews, AI-powered candidate screening and evaluation, dashboards, and workflow automation. His React/Next.js, Node.js, and AI integration skills were excellent. Reliable, responsive, and highly recommended for AI SaaS development.
JO
Joel O.
Jul 16, 2025
Full Stack Dev - React/NextJS
DL
Diane L.
Jul 12, 2025
Full Stack Event Management WebApp Development
Job has been done as required and on time. so thank you. we are cheking to see for the next one
About Mithun
AI Agent Developer | LLM, RAG, LangChain & Python
100%
Job Success
Dhaka, BangladeshĀ - 4:55 am local time
I help startups, SaaS companies, and growing businesses design and build intelligent AI systems from AI agents and RAG applications to AI chatbots, workflow automation, and full-stack AI products.
I create and implement AI agents, AI integration, chatbots, automation systems, AI SaaS solutions, custom web applications, AI-powered MVPs, AI healthcare solutions, AI writing tools, GPT clone, full stack application, multi-tenant and unique AI solutions in production.
Before writing a single line of code, I design a full-fledged AI strategy for your company, so you will have a clear understanding of what to build, how much it will cost, and what to exclude. Most mistakes related to AI budgets are related to development of the wrong things first.
Primary Expertise:
* AI Agent Development
* AI Automation
* LLM Application Development
* RAG Systems
* AI Chatbot Development
* Generative AI
* Multi-Agent Systems
* AI SaaS Development
* OpenAI API Integration
* LangChain Development
* Python AI Development
* Full-Stack AI Applications
Supporting Expertise:
* React.js
* Next.js
* TypeScript
* Node.js
* Express.js
* REST APIs
* WebSockets
* SaaS Architecture
* Multi-Tenant Applications
Technical Stack:
AI & LLM Development:
Python | AI Agents | LLMs | Generative AI | OpenAI API | LangChain | LlamaIndex | RAG | Multi-Agent Systems | Prompt Engineering | NLP | AI Chatbots
Backend Development:
Python | Node.js | Express.js | REST APIs | GraphQL | WebSockets | JWT Authentication | API Integration
Frontend Development:
React.js | Next.js | TypeScript | Tailwind CSS | Redux | Context API
SaaS & Application Development:
AI SaaS | Multi-Tenant SaaS | SaaS Architecture | RBAC | Subscription Systems | Billing Integration | Admin Dashboards
WHAT I'VE SHIPPED IN PRODUCTION:
1. AI Interview: AI Hiring Assistant SaaS Platform with Automated Interviews & Smart Candidate Screening
* AI-powered automated interviews 24/7
* Reduces hiring time by almost half
* SaaS dashboard
* Features: Interview recording, playback, bias-free screening, parallel processing
AI Hiring Platform | AI SaaS | Automated Interviews | Candidate Screening | AI Evaluation | Recruitment Automation
2. Multi-Agent Autonomous SEO Publishing Engine
* 6 Synchronized AI Agents working autonomously
* Automated daily SEO publishing
* Fact-checking AI built-in
* 23 schema types, 30+ language support
AI Agents | Multi-Agent Systems | AI Automation | Autonomous Agents | Generative AI
3. Chat SEO: SaaS SEO Chat Platform with Google Search Console Intelligence System
* AI-powered SEO chat interface
* Replaced 5 SEO subscriptions with one tool
* Full SaaS with billing, team management, affiliate tracking
* Live GSC integration, competitor analysis, crawl error detection
Generative AI | SEO Automation | AI Agents | Google Search Console | SaaS
4. Appointment AI Automation Platform with Social DM Lead Qualification
* AI lead qualification from Instagram DMs
* Converted DMs into sales calls
* Full SaaS platform (plans, billing, affiliate tracking)
* Multi-channel routing, ROI calculator
RAG | AI Chatbot | Knowledge Base | LangChain | LLM | OpenAI API
Send me your requirements, existing architecture, or product idea. I'll outline the recommended architecture, AI approach, and development roadmap before we start.
Steps for completing your project
After purchasing the project, send requirements so Mithun can start the project.
Delivery time starts when Mithun receives requirements from you.
Mithun works on your project following the steps below.
Revisions may occur after the delivery date.
Gather Requirements
Website design phase