You will get You Will Get API Development & Seamless Integrations
Project details
APIs are the backbone of modern digital products. I deliver secure, scalable, and well-documented APIs that connect your applications and streamline workflows. From REST to GraphQL and third-party integrations, I ensure your systems communicate seamlessly.
Services include:
RESTful & GraphQL API development
Secure authentication (OAuth, JWT)
Third-party integrations (Stripe, PayPal, CRMs, AI APIs)
Performance optimization & scalability
Clear API documentation for easy adoption
Let’s create APIs that make your systems smarter, faster, and more connected.
API Development, REST, GraphQL, Node.js API, ASP.NET API, Third-Party Integrations, Secure API
Services include:
RESTful & GraphQL API development
Secure authentication (OAuth, JWT)
Third-party integrations (Stripe, PayPal, CRMs, AI APIs)
Performance optimization & scalability
Clear API documentation for easy adoption
Let’s create APIs that make your systems smarter, faster, and more connected.
API Development, REST, GraphQL, Node.js API, ASP.NET API, Third-Party Integrations, Secure API
Programming Languages
JavaScript, Python, ASP.NETCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$400
|
Standard
$750
|
Advanced
$1,200
|
|---|---|---|---|
| Delivery Time | 5 days | 8 days | 14 days |
Number of Revisions | 0 | 0 | 0 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
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JR
Jesse R.
Oct 8, 2024
Troubleshooting: Fix to responsive navigation on personal web site
JR
Jesse R.
Aug 1, 2024
Troubleshooting: Small help to fix Google Maps on personal web site
The work I needed was done even faster than I expected. Hassan was proactive, cooperative, and easy to communicate with. I'm very happy with the results.
About Muhammad Hassan
Full Stack SaaS Developer | Node.js, React, .NET Core, AWS | API & Web
100%
Job Success
Lahore, Pakistan - 9:58 am local time
I help startups and growing businesses build scalable software products, modernize legacy systems, integrate AI capabilities, and design cloud-native architectures that support long-term growth. From concept and system architecture to deployment and scaling, I bridge the gap between business objectives and technical execution.
My expertise spans enterprise software architecture, AI integrations, backend engineering, cloud infrastructure, and technical leadership. Whether you're building an AI-powered SaaS platform, an enterprise application, an intelligent automation workflow, or a complex integration ecosystem, I can help transform your vision into a reliable, production-ready solution.
What I Can Help You Build:
AI-Powered Applications:
* OpenAI, ChatGPT, Claude, Gemini integrations
* AI Assistants & Chatbots
* Voice AI Solutions (Twilio, ElevenLabs)
* Retrieval-Augmented Generation (RAG)
* AI Workflow Automation
* Intelligent Document Processing
* AI Agents & Business Automation
SaaS Platforms & Multi-Tenant Applications:
* Subscription-based SaaS products
* Multi-tenant architecture
* Role-based access control
* Billing and automation systems
* Enterprise dashboards
Enterprise Software Development:
* ERP & CRM Solutions
* Healthcare & Insurance Platforms
* Business Process Automation
* Reporting & Analytics Systems
Backend & API Architecture:
* ASP.NET Core & .NET
* REST APIs & Microservices
* Secure Authentication & Authorization
* Third-Party Integrations
* High-Performance Backend Systems
Cloud & DevOps:
* Microsoft Azure & AWS
* Docker & Containerization
* CI/CD Pipelines
* Scalable Cloud Infrastructure
Core Technologies:
• C#, ASP.NET Core, .NET
• React, Next.js, TypeScript
• SQL Server, PostgreSQL, MongoDB
• Azure, AWS, Docker, Kubernetes
• OpenAI, Claude, Gemini, LangChain
• REST APIs, GraphQL, Microservices
• AI Agents, RAG, Automation Workflows
Why Clients Choose Me:
-11+ Years of Enterprise Software Development Experience
-AI + Enterprise Software Expertise
-100% Job Success Score on Upwork
-Solution Architecture & Technical Leadership
-Clean, Maintainable, Production-Ready Code
-Strong Communication & Business Understanding
-Focus on Scalability, Security & Long-Term Success
If you're looking for a senior engineer who can architect enterprise systems, build scalable SaaS products, and integrate modern AI capabilities into your business workflows, I'd be happy to discuss your project.
Let's build software that scales, automates, and creates measurable business value.
Steps for completing your project
After purchasing the project, send requirements so Muhammad Hassan can start the project.
Delivery time starts when Muhammad Hassan receives requirements from you.
Muhammad Hassan works on your project following the steps below.
Revisions may occur after the delivery date.
Requirement Discovery
Environment Setup & Tech Stack Configuration