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You will get scalable React.js & Next.js web application with API integration

Saifullah A.Status: Offline
Saifullah A. Saifullah A.
5.0
Top Rated
Preview image

Let a pro handle the details

Buy Custom Website Programming services from Saifullah , priced and ready to go.
Saifullah A.Status: Offline
Saifullah A. Saifullah A.
5.0
Top Rated
Preview image

Let a pro handle the details

Buy Custom Website Programming services from Saifullah , priced and ready to go.

Project details

You will get a scalable full-stack web application built with React.js, Next.js, Node.js, Express.js, and TypeScript. I specialize in creating custom dashboards, SaaS apps, and API integrations with secure backends, optimized databases (MongoDB, PostgreSQL, MySQL), and modern frontends that are responsive, SEO-friendly, and fast.

What sets me apart is my ability to handle both frontend (React.js, Next.js, Redux, Tailwind CSS) and backend (Node.js, Express.js, RESTful APIs, GraphQL) — ensuring a seamless, end-to-end solution. I also provide AWS/Supabase deployment, Stripe payment integration, and database optimization for performance and scalability.

With hands-on experience in building real-world applications, I guarantee clean, production-ready code, clear communication, and on-time delivery tailored to your project needs.
Programming Languages
HTML & CSS, JavaScript, TypeScript
Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization, Design
What's included
Service Tiers Starter
$180
Standard
$350
Advanced
$700
Delivery Time 4 days 10 days 21 days
Number of Revisions
23Unlimited
Number of Pages
1210
Design Customization
Content Upload
-
Responsive Design
Source Code
Optional add-ons You can add these on the next page.
Fast Delivery
+$50 - $200
Additional Revision
+$30
Additional Page (+ 2 Days)
+$90
Content Upload (+ 1 Day)
+$60

Frequently asked questions

5.0
3 reviews
100% Complete
(3)
1% Complete
(0)
1% Complete
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1% Complete
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1% Complete
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IL

Ian L.
5.00
May 4, 2026
Supabase Project Setup and Vercel Integration Saifullah went above and beyond to assist me in the project. He was knowledgeable and committed in landing the project in time. Will definitely make use of his services in future.

ST

Sudeep T.
5.00
Apr 21, 2026
Riverpe Product development Great experience working together. Demonstrated strong ownership and consistently showed a good understanding of the requirements. Delivered reliably and communicated well throughout. Would definitely recommend.

AA

Abdul A.
5.00
Mar 18, 2026
Urgent: Fix Node.js Backend & Connect with Vercel Frontend (Next.js) Saif was really quick in adapting things and errors. I hired him to deploy my backend in a very tight deadline and he just completed it in 2 hours! Really loved working with him. Highly recommended
Saifullah A.Status: Offline

About Saifullah

Saifullah A.Status: Offline
FinTech Backend Developer | Node.js, PostgreSQL, Stripe Systems
100% Job Success
5.0  (3 reviews)
Karachi, Pakistan - 5:08 pm local time
If your SaaS handles payments, subscriptions, or financial data — your backend cannot afford to fail.

I specialize in building secure, scalable backend systems for FinTech platforms and subscription-based SaaS products. My focus is on high-performance API architecture, payment infrastructure, and reliable database systems designed to handle real transactions and real revenue.

I don’t build “just working” APIs.
I engineer backend systems that are production-stable, secure, and built for scale.

💳 Subscription & Billing Infrastructure

Stripe subscription systems (plans, trials, upgrades, downgrades)
Webhook-based billing logic
Invoice generation & payment tracking
Usage-based billing systems
Multi-tier pricing architecture
Failed payment handling & retry logic

🔐 Secure SaaS Backend Architecture

Multi-tenant SaaS backend design
Role-based access control (RBAC)
JWT & OAuth2 authentication
Secure API authorization layers
Audit logs & activity tracking
Data isolation strategies

Security and clean architecture come first — especially in financial systems.

⚙️ Scalable API & System Engineering

REST & GraphQL API development
Modular backend architecture (NestJS / Express)
Background jobs & queue systems
Event-driven workflows
High-traffic API optimization
Error handling & production debugging

🗄 Database & Performance Optimization

Advanced PostgreSQL schema design
Query optimization & indexing strategies
Transaction-safe financial data handling
Redis caching layers
Data modeling for subscription systems
Prisma ORM & database migrations

Well-structured databases prevent scaling headaches later.

☁️ Cloud & Infrastructure (SaaS-Focused)

AWS (EC2, RDS, S3, Lambda)
Docker containerized environments
CI/CD pipelines
Secure production deployment
Infrastructure cost optimization
Monitoring & logging setup

I design backend systems that support uptime, performance, and growth.

📈 Systems I Build

Subscription-based SaaS platforms
FinTech dashboards & payment systems
API-first SaaS products
Internal financial tools
Usage-based SaaS platforms
Secure admin panels

🧠 How I Work

I think in systems before writing code.

Architecture planning
Database modeling
Secure authentication design
Modular API development
Billing & webhook implementation
Production deployment & monitoring

The result:

✔ Clean, maintainable backend
✔ Stable financial logic
✔ Scalable infrastructure
✔ Reduced technical debt
✔ Long-term SaaS readiness

If you're building a SaaS product that handles subscriptions, payments, or financial workflows, I can help you build the backend foundation correctly from day one.






Keywords

Node.js Backend Development, FinTech Backend Engineering, Subscription Billing Systems, Stripe Integration Developer, PostgreSQL Database Design, Multi-Tenant SaaS Architecture, Secure API Development, NestJS Backend Developer, SaaS Payment Infrastructure, REST API Development, GraphQL API Architecture, JWT Authentication Systems, AWS SaaS Deployment, Backend Performance Optimization, Usage-Based Billing Systems

Steps for completing your project

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

Delivery time starts when Saifullah receives requirements from you.

Saifullah works on your project following the steps below.

Revisions may occur after the delivery date.

2

Project Planning & Setup (stack setup: React.js/Next.js, Node.js, DB schema, Git repo).

2

Frontend Development (responsive UI, dashboards, Figma to React.js/Next.js, SEO optimizations).

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