You will get MERN Stack SaaS Developer | API Integration, Node.js Backend Development
Rising Talent
Project details
🤖 AI-POWERED SAAS & AUTOMATION BUILT ON NODE.JS + MONGODB
Looking for a developer who can actually ship an AI feature — not just talk about it? I build production-grade SaaS backends with real AI integration: OpenAI/GPT-powered automation, WhatsApp API workflows, and background job processing that runs reliably at scale.
💼 WHAT I'VE ACTUALLY BUILT (not just theory)
🔹 An AI-powered WhatsApp bookkeeping SaaS: Node.js + MongoDB + Redis + BullMQ backend, with an OpenAI-driven NLP parser that reads real customer messages, JWT auth with refresh-token rotation, and automated PDF invoice generation
🔹 Real-time platforms using Socket.io for live chat, notifications, and status updates
🔹 Secure, scalable REST APIs designed to handle production traffic, not just demos
✅ SERVICES INCLUDED
✔️ SaaS MVP development (auth, subscriptions, dashboards, roles)
✔️ AI/OpenAI integration — chatbots, NLP parsing, automated workflows
✔️ WhatsApp Business API / third-party messaging integration
🔧 TECH STACK
Backend: Node.js, Express.js, MongoDB, Redis, BullMQ, Socket.io
AI/Integrations: OpenAI API, WhatsApp Business API, PDF generation
Frontend: React.js, Tailwind CSS, Framer Motion
Looking for a developer who can actually ship an AI feature — not just talk about it? I build production-grade SaaS backends with real AI integration: OpenAI/GPT-powered automation, WhatsApp API workflows, and background job processing that runs reliably at scale.
💼 WHAT I'VE ACTUALLY BUILT (not just theory)
🔹 An AI-powered WhatsApp bookkeeping SaaS: Node.js + MongoDB + Redis + BullMQ backend, with an OpenAI-driven NLP parser that reads real customer messages, JWT auth with refresh-token rotation, and automated PDF invoice generation
🔹 Real-time platforms using Socket.io for live chat, notifications, and status updates
🔹 Secure, scalable REST APIs designed to handle production traffic, not just demos
✅ SERVICES INCLUDED
✔️ SaaS MVP development (auth, subscriptions, dashboards, roles)
✔️ AI/OpenAI integration — chatbots, NLP parsing, automated workflows
✔️ WhatsApp Business API / third-party messaging integration
🔧 TECH STACK
Backend: Node.js, Express.js, MongoDB, Redis, BullMQ, Socket.io
AI/Integrations: OpenAI API, WhatsApp Business API, PDF generation
Frontend: React.js, Tailwind CSS, Framer Motion
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$99
|
Standard
$450
|
Advanced
$999
|
|---|---|---|---|
| Delivery Time | 7 days | 16 days | 28 days |
Number of Revisions | 3 | 5 | Unlimited |
Number of Pages | 1 | 4 | 8 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code | - |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$70 - $200
Additional Revision
+$75
Additional Page
(+ 3 Days)
+$150
Source Code
(+ 1 Day)
+$150Frequently asked questions
About Zain
Full-Stack MERN Developer | SaaS, CRM & API Integration
Sargodha, Pakistan - 2:08 am local time
Production experience:
WhatsApp CRM — customer management, role-based team access, automated lead scoring, reminders and real-time communication
Trading Signals SaaS — subscription tiers, protected user accounts, admin analytics and subscription management
AI Freelancer Optimization Tool — OpenAI API integration, AI-generated recommendations and automated scoring
Real Estate Platform — property listings, real-time search/filtering and image management
All four are live and demoable — I'll walk you through the actual running product, not just a portfolio screenshot.
I build custom web applications, SaaS platforms, and CRMs from scratch, or extend and fix existing ones.
What I offer
Backend — secure, production-ready architecture
Secure backend architecture: JWT authentication, role-based access control, rate limiting, input validation/sanitization, protected REST APIs
MongoDB schemas designed to scale with data growth
Cron-driven automation — lead reminders, inactive-user detection, subscription limits
Socketio real-time features
Swagger-documented APIs for painless handoff to other developers
Frontend
React.js and Next.js, Tailwind CSS, Redux Toolkit/Zustand, React Hook Form
Responsive dashboards, complex forms, search and filtering
AI & OpenAI integrations: I've integrated the OpenAI API into production applications for smart tagging, keyword suggestions, competitor analysis, and AI-powered scoring. If you want an AI feature added to your product without a six-month roadmap, that's familiar territory.
A valuable advantage for Pakistani and South Asian businesses: Hands-on experience integrating JazzCash, Easypaisa, and the WhatsApp Cloud API — the payment rails and messaging channels these businesses actually run on. If your application needs local payment support alongside or instead of Stripe, I can integrate the payment flow into your existing stack.
How I work
I confirm scope, data models, and edge cases in writing before writing a line of code
Work is broken into milestones so you can see progress and redirect early if needed
I test with Jest and Postman before handoff
I document endpoints so you're never locked into needing me for every future change
I communicate early, clearly, and consistently throughout the project
Why work with me
I offer senior-level development discipline — security, clean architecture, testing, and documentation — while keeping my rates competitive.
If you need a full-stack MERN application built from scratch, an existing React/Node.js codebase fixed or extended, a payment or messaging integration added, or an AI feature bolted onto your product — send me a message with what you're trying to build. I'll tell you honestly whether it's a good fit and roughly how long it'll take.
Let's build something that actually works.
Steps for completing your project
After purchasing the project, send requirements so Zain can start the project.
Delivery time starts when Zain receives requirements from you.
Zain works on your project following the steps below.
Revisions may occur after the delivery date.
Workflow Discovery
map out exactly what should be automated and where AI genuinely adds value (vs. simple logic)
Architecture & Data Design
plan MongoDB schema, Redis/BullMQ job queues, and API structure