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You will get Deploy Your MERN/Node App on Render | CI/CD, Docker & Custom Domain Setup
Project details
I will develop and deliver a fully secure, scalable, and well-documented REST API tailored to your business needs. This includes everything from backend setup and JWT-based authentication to API testing and deployment on Render.
The project ensures best practices in cybersecurity, performance optimization, and code maintainability while offering clear documentation and Postman collections for easy integration.
🛠️ What You'll Get
âś… Secure REST API using Node.js/Express (or preferred framework)
âś… JWT Authentication (Login/Register, Token Handling)
âś… Database integration (MongoDB, PostgreSQL, etc.)
âś… Modular code structure with clean architecture
âś… Full API testing using Postman (with test scripts)
âś… Live deployment on Render (CI/CD optional)
âś… Swagger or Postman documentation
âś… Security enhancements (rate limiting, CORS, Helmet, etc.)
âś… Performance tuning & error handling
🚀 Tech Stack
Backend: Node.js, Express.js, (or client’s preferred tech)
Database: MongoDB, PostgreSQL, MySQL
Security: JWT, Helmet, bcrypt, CORS, rate limiting
Testing: Postman, Swagger, Jest (if needed)
Deployment: Render.com, GitHub CI/CD (optional)
The project ensures best practices in cybersecurity, performance optimization, and code maintainability while offering clear documentation and Postman collections for easy integration.
🛠️ What You'll Get
âś… Secure REST API using Node.js/Express (or preferred framework)
âś… JWT Authentication (Login/Register, Token Handling)
âś… Database integration (MongoDB, PostgreSQL, etc.)
âś… Modular code structure with clean architecture
âś… Full API testing using Postman (with test scripts)
âś… Live deployment on Render (CI/CD optional)
âś… Swagger or Postman documentation
âś… Security enhancements (rate limiting, CORS, Helmet, etc.)
âś… Performance tuning & error handling
🚀 Tech Stack
Backend: Node.js, Express.js, (or client’s preferred tech)
Database: MongoDB, PostgreSQL, MySQL
Security: JWT, Helmet, bcrypt, CORS, rate limiting
Testing: Postman, Swagger, Jest (if needed)
Deployment: Render.com, GitHub CI/CD (optional)
Programming Languages
HTML & CSS, JavaScript, PythonCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$50
|
Standard
$70
|
Advanced
$90
|
|---|---|---|---|
| Delivery Time | 3 days | 5 days | 7 days |
Number of Revisions | 2 | 3 | 4 |
Number of Pages | 3 | 5 | 7 |
Design Customization | - | - | - |
Content Upload | - | ||
Responsive Design | |||
Source Code | - | - |
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MB
Muhammad B.
Jan 23, 2026
Expert Backend Developer for AI SaaS Bug Fix
Quickly identified the issue and fixed the backend bug with clean, efficient code, great AI SaaS expertise.
About Zubair
Lovable, Bolt & Replit App Fixes | Supabase, Stripe, Security Audit
Islamabad, Pakistan - 9:56 am local time
That gap between "it works in the demo" and "it survives real users" is what I fix.
I'm a full-stack developer (Node.js, Express, React/Next.js, Supabase, PostgreSQL) and a CEH-certified ethical hacker. Plenty of developers can add features to an AI-generated app. Fewer can look at that code and tell you which part will quietly leak your customers' data the week after launch. I do both.
WHAT I FIX
- Supabase Row Level Security: real tenant-to-tenant data isolation, not "RLS enabled" and hope for the best
- Broken authentication and sessions (Supabase Auth, JWT, OAuth, Auth0)
- Exposed API keys, secrets in the repo, service-role keys shipped to the browser
- Stripe and Lemon Squeezy billing: checkout, webhooks, idempotency, failed payments, plan gating
- Uncapped AI/LLM endpoints that let anyone run up your OpenAI or Claude bill
- Input validation, SQL injection, rate limiting, error handling
- Real backends added to frontend-only vibe-coded apps: schema design, APIs, migrations
- Deployments that hold: env vars, custom domains, CI/CD, Vercel, Docker, AWS
HOW I WORK
1. Send me your app link or repo. I take a look and tell you honestly what's wrong. No charge, no pitch.
2. You get findings ranked by severity, in plain English. "Any signed-in user can read every other customer's records", not a wall of CVE numbers.
3. We agree a fixed price per fix. Work is delivered as pull requests you review and approve. Your code stays yours throughout.
PROOF
- Shipped an AI study app, live on Google Play with 100+ users
- Built and deployed a RAG document Q&A chatbot for a SaaS client
- Production fintech work at VaultsPay: JWT auth, secure APIs, CI/CD pipelines
- Backend team lead on a 5-developer SaaS build (Node.js, React, MongoDB)
- CEH (Certified Ethical Hacker), EC-Council, 2025
- 5.0 on Upwork: hired to fix an AI SaaS backend bug, diagnosed and shipped inside 24 hours
WAYS TO START
- Free 15-minute review of your app before you spend anything
- Fixed-price security audit with a written, severity-ranked report
- Fixed-price rescue: auth, backend, payments and deployment sorted so you can launch
- Hourly or monthly retainer once you're live and want someone on call
Send me your app link and tell me what's breaking. If it isn't something I can genuinely help with, I'll tell you that too.
Keywords: Lovable developer, Lovable app fix, Bolt.new developer, Replit developer, Base44, v0, Cursor, vibe coding, vibe code rescue, AI app production ready, MVP rescue, Supabase RLS, Supabase auth, Supabase edge functions, PostgreSQL, Stripe integration, Stripe webhooks, Lemon Squeezy, Next.js, React, TypeScript, Node.js, Express, security audit, code review, bug fix, API development, full-stack developer.
Steps for completing your project
After purchasing the project, send requirements so Zubair can start the project.
Delivery time starts when Zubair receives requirements from you.
Zubair works on your project following the steps below.
Revisions may occur after the delivery date.
Gather Requirements
Get client details (as shared in the previous message) Clarify endpoints, security needs, tech stack, and deployment preferences Confirm timelines and deliverables
Project Setup
Initialize Git repository (locally or GitHub) Set up the backend project (e.g., Express.js or preferred framework) Configure .env for environment variables (JWT secret, DB URI, etc.)