You will get a secure and scalable backend API for your web or mobile app
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Project details
Build a Backend That Can Scale With Your Business 🚀
A strong backend is the foundation of every successful application. Whether you're building a SaaS platform, AI application, mobile app, or internal business tool, I'll create a backend that's secure, scalable, and designed for long-term growth.
I develop modern backend systems with clean architecture, robust APIs, secure authentication, optimized databases, and seamless integrations so your application can handle increasing users and evolving business requirements.
From startup MVPs to enterprise platforms, I'll build a backend that's production-ready from day one.
What I Can Build
✅ Authentication & Authorization
✅ User Management
✅ Role-Based Access Control (RBAC)
✅ Database Design
✅ Email & Notification Services
✅ Payment Gateway Integration
✅ Third-Party API Integrations
✅ Admin APIs
✅ AI Backend Services
✅ SaaS Backend Architecture
✅ Mobile App APIs
Technology Stack:
Backend
• Node.js / Express.js / NestJS (if preferred)
• TypeScript
Database
• PostgreSQL / Supabase / MongoDB / Prisma ORM
• JWT / OAuth / Supa-base Auth
• Cloud & DevOps
• Docker
• DigitalOcean / OpenAI / Google APIs
• REST APIs
A strong backend is the foundation of every successful application. Whether you're building a SaaS platform, AI application, mobile app, or internal business tool, I'll create a backend that's secure, scalable, and designed for long-term growth.
I develop modern backend systems with clean architecture, robust APIs, secure authentication, optimized databases, and seamless integrations so your application can handle increasing users and evolving business requirements.
From startup MVPs to enterprise platforms, I'll build a backend that's production-ready from day one.
What I Can Build
✅ Authentication & Authorization
✅ User Management
✅ Role-Based Access Control (RBAC)
✅ Database Design
✅ Email & Notification Services
✅ Payment Gateway Integration
✅ Third-Party API Integrations
✅ Admin APIs
✅ AI Backend Services
✅ SaaS Backend Architecture
✅ Mobile App APIs
Technology Stack:
Backend
• Node.js / Express.js / NestJS (if preferred)
• TypeScript
Database
• PostgreSQL / Supabase / MongoDB / Prisma ORM
• JWT / OAuth / Supa-base Auth
• Cloud & DevOps
• Docker
• DigitalOcean / OpenAI / Google APIs
• REST APIs
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Performance Optimization, Security, W3C Markup Validation ServiceWhat's included
| Service Tiers |
Starter
$499
|
Standard
$1,599
|
Advanced
$2,999
|
|---|---|---|---|
| Delivery Time | 4 days | 8 days | 20 days |
Number of Revisions | 0 | 0 | 0 |
Design Customization | |||
Content Upload | |||
Responsive Design | - | - | - |
Source Code |
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OB
Osama B.
Apr 2, 2026
Senior Frontend Developer
Excellent work delivered by Hasnain.
OB
Osama B.
Oct 26, 2025
Senior Frontend Developer
BR
Bob R.
Aug 17, 2025
Misc.
PC
Prakaikaew C.
Dec 30, 2024
Frontend Developer
MA
Miguel A.
Jan 25, 2022
React Developer. Gatsby.js and Next.js
About Hasnain
Full-Stack Engineer & AI Automation Specialist | React, Next.js, LLMs,
100%
Job Success
Karachi, Pakistan - 4:13 pm local time
I help startups and enterprises build scalable SaaS platforms and integrate AI agents to automate complex workflows. With 5+ years of experience, I bridge the gap between robust full-stack architecture and cutting-edge AI implementation.
🤖 AI & Automation Expertise
- LLM Integration: OpenAI, Claude, Gemini, and custom model fine-tuning.
- AI Agents: Building autonomous agents for customer support, data analysis, and task execution.
- Workflow Automation: n8n, Zapier, and custom Python scripts to streamline operations.
- RAG Systems: Retrieval-Augmented Generation for knowledge bases and chatbots.
💻 Full-Stack Development
- Frontend: React.js, Next.js, TypeScript, Tailwind CSS, Shadcn UI.
- Backend: Node.js, NestJS, Express, Microservices, Event-Driven Architecture.
- Database: PostgreSQL, MongoDB, Redis, Prisma, Supabase.
- Mobile: React Native (iOS & Android).
🏗️ What I Deliver
- MVPs & SaaS: Production-ready code with clean architecture (DDD, Clean Architecture).
- Scalability: Systems designed to grow without performance bottlenecks.
- Speed: Rapid prototyping to market validation.
- I focus on writing maintainable code, clear communication, and delivering solutions that solve real business problems. Whether you need a new AI-powered product or an existing system optimized for scale, I am ready to help.
Let's discuss your project goals and how we can bring your vision to life.
Steps for completing your project
After purchasing the project, send requirements so Hasnain can start the project.
Delivery time starts when Hasnain receives requirements from you.
Hasnain works on your project following the steps below.
Revisions may occur after the delivery date.
Step 1 — Discovery & Architecture
We'll discuss your business goals, application requirements, database structure, and integrations. I'll design a backend architecture that supports your current needs and future growth.
Step 2 — Backend Development
I'll build your backend APIs, implement authentication, design the database, integrate third-party services, and ensure everything follows clean architecture principles.