You will get Full Stack Web Developer | MERN | Node JS | React JS | MongoDB | Next JS
Project details
👋 Hi there! 🌟Are you looking for a Full Stack Developer who has extensive hands-on experience in both Front End Development & Back End Development ? Congrats! You are at the right place.
⭐ IMPORTANT: Every Client has custom requirements - let's talk in Upwork Chat before ordering
All Full Stack Development / Customization / Updates / Fixes will be done at $15/hr. Can give fixed price also after communication in Upwork messages. ⭐
After discussing your complete project requirements in the Upwork chat - Will share you fix price & timeline for project completion. Let's start talk with the Section below.
🚀My Services includes:
➥ MEAN stack-based development, including full-stack website development
➥ Website development and web application development using MERN, React.js, Node.js, and MongoDB, Next.js, Laravel
➥ Conversion of PSD/Xd/Figma designs into responsive websites using React.js, Next.js, Redux, and Node.js
➥ APIs development and integration to enhance website functionality
➥ Code debugging and optimization for fast loading and improved performance
➥ Ensuring mobile responsiveness and cross-browser compatibility for seamless user experience
➥ Fixing bugs and issues.
⭐ IMPORTANT: Every Client has custom requirements - let's talk in Upwork Chat before ordering
All Full Stack Development / Customization / Updates / Fixes will be done at $15/hr. Can give fixed price also after communication in Upwork messages. ⭐
After discussing your complete project requirements in the Upwork chat - Will share you fix price & timeline for project completion. Let's start talk with the Section below.
🚀My Services includes:
➥ MEAN stack-based development, including full-stack website development
➥ Website development and web application development using MERN, React.js, Node.js, and MongoDB, Next.js, Laravel
➥ Conversion of PSD/Xd/Figma designs into responsive websites using React.js, Next.js, Redux, and Node.js
➥ APIs development and integration to enhance website functionality
➥ Code debugging and optimization for fast loading and improved performance
➥ Ensuring mobile responsiveness and cross-browser compatibility for seamless user experience
➥ Fixing bugs and issues.
Programming Languages
JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$50
|
Standard
$250
|
Advanced
$1,500
|
|---|---|---|---|
| Delivery Time | 1 day | 7 days | 30 days |
Number of Revisions | 2 | 5 | Unlimited |
Number of Pages | 1 | 4 | 15 |
Design Customization | - | ||
Content Upload | - | - | |
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$50 - $150
Additional Page
(+ 1 Day)
+$30
Design Customization
(+ 1 Day)
+$30Frequently asked questions
4 reviews
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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
MI
Mazaharul I.
May 18, 2025
30 minute consultation
SM
Shashi M.
Apr 16, 2025
Change text on our current website and make it relevant for a new market . need basic HTML knowledge
About Mithun
AI Agent Developer & Automation Expert | AI SaaS, MVPs, RAG
86%
Job Success
Dhaka, Bangladesh - 3:12 am local time
Most businesses don’t need just another chatbot, they need end-to-end AI systems that think, integrate, and execute.
I specialize in building custom AI agents and automation platforms (code & no-code) that streamline operations across sales, marketing, and support. With a background in full-stack development, I’ve shifted focus to AI and now deliver production-ready solutions that save time, reduce costs, and generate revenue.
Achievements & Results:
✔ Saved clients 20–30+ hours per week by automating customer support, appointment scheduling, lead follow-ups, and internal business processes with AI agents.
✔ Improved lead response times by up to 90% through AI voice agents, WhatsApp sales agents, automated follow-up systems, and CRM integrations.
✔ Reduced repetitive manual work by up to 80% using AI call answering agents, employee help desk assistants, knowledge base chatbots, and workflow automation.
✔ Built 30+ AI agents and automation systems, including voice AI, customer support agents, appointment booking agents, RAG chatbots, call automation systems, and multi-agent business workflows.
Industries I've Built Solutions For:
I help startups and SMBs across SaaS companies, AI startups, marketing and digital agencies, real estate businesses, healthcare and medical clinics, e-commerce brands, online education platforms, and professional service providers implement AI automation and AI agent systems.
My solutions are designed for businesses with high-volume sales, customer support, and operations workflows, where AI-powered automation, LLM-based agents, CRM automation, voice AI systems, and workflow automation tools (n8n, Make, Zapier) can reduce manual workload, improve lead response time, and increase conversion efficiency.
Typical clients include B2B SaaS companies, lead generation agencies, appointment-based service businesses, real estate teams, clinics, and fast-scaling startups looking to integrate AI customer support, AI sales automation, and end-to-end business process automation to scale without increasing headcount.
Core Services & Expertise:
AI Agents & Business Automation
Design and deploy custom AI Agents, Multi-Agent Systems, and AI Automation workflows that streamline operations, reduce manual work, and improve efficiency.
AI Voice Agents & AI Receptionists
Build AI Voice Agents, AI Receptionists, Call Answering Systems, Appointment Booking Agents, and Outbound Calling Solutions that operate 24/7.
AI Chatbots & RAG Solutions
Develop AI Chatbots, RAG Systems, Knowledge Base Assistants, and PDF AI Assistants powered by OpenAI, Claude, LangChain, and Vector Databases.
Sales, Lead Generation & CRM Automation
Create AI WhatsApp Agents, Lead Qualification Systems, Follow-Up Automation, and CRM Workflows integrated with GoHighLevel, HubSpot, Salesforce, and other business tools.
Internal AI Assistants & Knowledge Systems
Build AI Employee Help Desk Agents, Internal Knowledge Assistants, SOP Assistants, and Document Intelligence Solutions for teams and organizations.
Workflow Automation & System Integrations
Automate business processes using n8n, Make, APIs, Webhooks, Airtable, Notion, Google Workspace, databases, and third-party platforms.
Custom AI SaaS & Full-Stack Development
Develop scalable AI SaaS platforms, AI-powered applications, custom dashboards, backend systems, and API integrations tailored to your business needs.
Tools & Technologies:
AI Agents • Multi-Agent Systems • MCP (Model Context Protocol) • AI Workflow Automation • AI Orchestration • LangChain • LangGraph • RAG • Prompt Engineering • OpenAI (GPT-4o, Assistants API) • Claude API • Google Gemini • Vector Databases • Pinecone • Weaviate • ChromaDB • FAISS • Vapi AI • Retell AI • ElevenLabs • Whisper • AI Voice Agents • WhatsApp Automation • CRM Automation • n8n • Make • Zapier • Pipedream • GoHighLevel • HubSpot • Salesforce • Twilio • Python • FastAPI • Node.js • React • Next.js • PostgreSQL • MongoDB • Redis • Supabase • Firebase • AWS • Docker
Why Work With Me?
When you work with me, you get end-to-end AI automation solutions, from strategy and architecture to development, deployment, and handoff.
I build reliable AI agents, voice AI systems, RAG applications, and business automations that help companies scale operations without scaling headcount.
Ready to Automate Your Business?
Message me to discuss your project and receive a free automation consultation.
Click "Invite to Job" and let's build AI systems that save time, reduce operational costs, and help your business grow faster.
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 & Analysis the Requirements
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