Upwork home
Sign up
Project Catalog
DesignDesign
Video & AudioVideo & Audio
Development & ITDevelopment & IT
MarketingMarketing
Writing & TranslationWriting & Translation
MoreMore

You will get Expert MERN Stack Developer | Node.js, Next, MongoDB, Full-Stack Solutions

Walid S.Status: Offline
Walid S. Walid S.
5.0
Preview image

Let a pro handle the details

Buy Web Application Programming services from Walid, priced and ready to go.
Walid S.Status: Offline
Walid S. Walid S.
5.0
Preview image

Let a pro handle the details

Buy Web Application Programming services from Walid, priced and ready to go.

Project details

🚀 Build Scalable Web Apps with an Expert MERN Stack Developer

Looking to develop a high-performance web application using MongoDB, Express.js, React, and Node.js? I specialize in building full-stack MERN applications that are fast, secure, and scalable. From custom APIs and dynamic dashboards to complete SaaS platforms, I deliver clean, maintainable code and reliable solutions tailored to your business needs.

🔧 Services include:
✔️ Custom REST APIs (Node.js/Express)
✔️ Responsive Frontends (React.js)
✔️ MongoDB integration & schema design
✔️ Authentication, role management & deployment
✔️ Bug fixes, optimizations & feature upgrades

Please message me before placing an order to discuss your requirements and ensure we’re a perfect fit
Programming Languages
PHP, HTML & CSS, JavaScript
Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization, Design
What's included
Service Tiers Starter
$99
Standard
$450
Advanced
$950
Delivery Time 5 days 14 days 29 days
Number of Revisions
59Unlimited
Number of Pages
2510
Design Customization
-
-
-
Content Upload
-
-
-
Responsive Design
-
-
-
Source Code
-
-
-
Optional add-ons You can add these on the next page.
Fast Delivery
+$100 - $400
Additional Revision
+$50
Additional Page (+ 3 Days)
+$150
Responsive Design (+ 2 Days)
+$60
Source Code (+ 2 Days)
+$200

Frequently asked questions

5.0
1 review
100% Complete
(1)
1% Complete
(0)
1% Complete
(0)
1% Complete
(0)
1% Complete
(0)

Pf

Pablo f.
5.00
Nov 2, 2021
FBA wholesale products and managing
Walid S.Status: Offline

About Walid

Walid S.Status: Offline
AI Automation Developer | n8n, AI Agents & RAG Systems
5.0  (1 review)
Peshawar, Pakistan - 4:22 am local time
Need AI automation that works reliably in real business workflows—not just in a demo?
I build AI agents, n8n automations, RAG systems, and Node.js/Python backends for startups and agencies.

Whether you need to automate lead handling, connect business tools through APIs, build an internal AI assistant, improve an existing RAG pipeline, or turn an AI idea into a working MVP, I focus on reliable architecture, clear error handling, and maintainable delivery.

What I can build
• AI agents and LLM workflows using OpenAI, Claude, Gemini, LangChain, and LangGraph
• RAG applications with Pinecone, pgvector, or Chroma for document search and AI assistants
• n8n workflows with APIs, webhooks, OAuth, retries, error handling, and human approval steps
• CRM and business automation for GoHighLevel, HubSpot, Salesforce, and third-party tools
• Node.js/Express and Python/FastAPI APIs, integrations, background workers, and backend
services
• Database and deployment setups using PostgreSQL, MongoDB, Redis, Docker, AWS, GCP, or Vercel

How I approach projects
• Start by understanding the workflow, users, integrations, and success criteria
• Build a practical solution with clean, maintainable code
• Add logging, error handling, retries, and monitoring where the workflow requires it
• Provide documentation and a Loom handover walkthrough

Relevant experience
I have 5+ years of backend and SaaS development experience, including API-driven applications, cloud storage, database optimization, automation workflows, and customer-support chatbot integrations. I use that backend foundation to build AI systems that are dependable, secure, and ready to evolve with your business.

If you have an automation bottleneck, an AI concept, or an existing workflow that needs improvement, send me the details. I’ll help you define a practical first milestone and implementation plan

Steps for completing your project

After purchasing the project, send requirements so Walid can start the project.

Delivery time starts when Walid receives requirements from you.

Walid works on your project following the steps below.

Revisions may occur after the delivery date.

Project Kickoff & Requirement Confirmation

🔹 Review scope, features, and tech preferences 🔹 Finalize requirements and expected deliverables

UI/UX Planning or Design Integration

🔹 Analyze provided design (or create wireframes if needed) 🔹 Set up component structure for React frontend

Review the work, release payment, and leave feedback to Walid.