You will get a custom REST API using FastAPI or Express
Project details
Are you building a mobile app, a complex frontend, or need to connect multiple services together? A reliable, blazing-fast backend is the foundation of any great software product.
I specialize in building custom, high-performance REST APIs and Webhooks using modern frameworks: FastAPI (Python) and Express.js (Node.js).
What I offer:
• Custom RESTful API development
• Webhook endpoints (for Stripe, Zapier, Shopify, etc.)
• Database Integration (PostgreSQL, MySQL, MongoDB)
• Authentication & Authorization (OAuth, JWT)
• Third-party API Integrations (OpenAI, Twilio, Payment gateways)
• Automated API Documentation (Swagger / OpenAPI)
• Dockerization for easy deployment
Why choose me?
• Performance First: I write clean, asynchronous code built for speed.
• Secure: Best practices in data validation, routing, and security.
• Maintainable: Structured architectures that are easy for your team to scale.
Please message me before placing an order to discuss your exact requirements and architecture!
I specialize in building custom, high-performance REST APIs and Webhooks using modern frameworks: FastAPI (Python) and Express.js (Node.js).
What I offer:
• Custom RESTful API development
• Webhook endpoints (for Stripe, Zapier, Shopify, etc.)
• Database Integration (PostgreSQL, MySQL, MongoDB)
• Authentication & Authorization (OAuth, JWT)
• Third-party API Integrations (OpenAI, Twilio, Payment gateways)
• Automated API Documentation (Swagger / OpenAPI)
• Dockerization for easy deployment
Why choose me?
• Performance First: I write clean, asynchronous code built for speed.
• Secure: Best practices in data validation, routing, and security.
• Maintainable: Structured architectures that are easy for your team to scale.
Please message me before placing an order to discuss your exact requirements and architecture!
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Security, DesignWhat's included
| Service Tiers |
Starter
$50
|
Standard
$150
|
Advanced
$400
|
|---|---|---|---|
| Delivery Time | 2 days | 5 days | 10 days |
Number of Revisions | 1 | 3 | Unlimited |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
Frequently asked questions
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LD
Lino D.
Feb 13, 2026
Video Player Migration from Single to Series (HLS/m3u8)
bravo l'ho consiglio
BB
Ben B.
Aug 7, 2023
Stripe Webhook
Hamza did an excellent job writing the needed stripe webhook. We are very pleased and look forward to working together in the future.
BB
Ben B.
Aug 7, 2023
API integration with Openai and Deepgram
Hamza is a pleasure to work with. Direct, honest, articulate, skilled, and highly responsive.
BB
Ben B.
May 15, 2023
Swiftba item: 1a
Hamza helped us with a complex AI integration into our web application. He is a pleasure to work with. Very fast, diligent, and responsive. Would strongly recommend!
About Muhammad Hamza
Full Stack Developer | AI Integrations | SaaS Specialist
Turin, Italy - 6:23 pm local time
“Direct, honest, articulate, skilled, and highly responsive.”
“Very fast, diligent, and responsive. Would strongly recommend.”
I build production grade AI integrations and automation systems for startups and product teams that need results.
If you are looking to integrate GPT, LLMs, AI agents, or automation workflows into a real product with real users, I am the engineer you hire when reliability, scalability, and clean infrastructure matter.
I specialize in taking AI from concept to live, revenue-generating systems: APIs, chatbots, assistants, real-time services, and backend automation deployed on AWS, GCP, or Azure with proper DevOps and MLOps discipline.
Core Expertise
AI Integration & Automation
• OpenAI GPT / Whisper API integration
• LLM-powered chatbots, assistants, and agents
• Embeddings, vector stores, retrieval-augmented generation (RAG)
• LangChain-based orchestration and agent workflows
• PDF, document, and audio intelligence pipelines
• AI automation for customer support, internal tools, and workflows
Backend & Full-Stack Engineering
• Node.js, Go, Python backend services
• Scalable REST and event-driven APIs
• Real-time systems with live updates
• Secure payment integrations (Stripe, PayPal)
• Webhooks, background jobs, queues
Cloud, DevOps & MLOps
• AWS (Lambda, EC2, Cognito, SNS, CloudWatch, ECR, ECS)
• GCP and Azure production deployments
• Dockerized services and container orchestration
• CI/CD pipelines and environment automation
• Scalable database design and performance optimization
This combination allows me to own the full AI lifecycle: architecture, integration, deployment, monitoring, and iteration.
Production Systems I’ve Built
Chat APT
A GPT-powered WhatsApp AI assistant that reached 8,000+ users and processed over 300,000 messages in 10 days.
• Real-time messaging at scale
• GPT-based conversation handling
• PDF analysis and document intelligence
• Audio transcription via Whisper
• Production deployment with monitoring and fail-safes
Swiftba
An AI meeting assistant built for real users—not demos.
• Node.js, React, GPT APIs
• PostgreSQL and Firebase
• Deployed on Google Cloud Platform
• Designed for reliability and low-latency AI responses
Booksquare GPT
An AI PDF/Epub reader focused on deep document interaction.
• TypeScript, React, Go backend
• GPT-powered content understanding
• Structured data extraction and semantic search
• Production database architecture
QInteractive
An AI assistant designed for structured, contextual interaction with religious text.
• Emphasis on accuracy, context preservation, and retrieval
• Custom prompt engineering and response control
Every one of these systems was built with production constraints in mind: performance, scalability, observability, and cost control.
Technology Stack
Frontend
React, React Native, TypeScript, JavaScript, HTML, CSS
Backend
Node.js, Go, Python, C#, Java
Databases
PostgreSQL, MySQL, MongoDB, SQL Server
Cloud & Infrastructure
AWS, GCP, Azure
Docker, ECS, ECR, serverless and containerized workloads
APIs & Integrations
OpenAI GPT & Whisper
Stripe, PayPal
Twilio, WhatsApp
Google Maps, Shopify
Why Clients Hire Me
• I understand both AI and infrastructure
• I move fast without cutting corners
• I communicate clearly and directly
• I design systems that scale beyond MVP
• I treat your product like a production system, not a prototype
I am a strong fit if you need:
• GPT or LLM integration into an existing product
• AI chatbots or assistants with real users
• Document, PDF, or audio intelligence systems
• AI-powered automation workflows
• A senior engineer who can architect, build, and deploy end-to-end
If you are building something serious and want AI that actually works in production, we will work well together.
Send a message with your use case, current stack, and scale expectations. I will tell you quickly if I’m the right fit and how I would approach it.
Steps for completing your project
After purchasing the project, send requirements so Muhammad Hamza can start the project.
Delivery time starts when Muhammad Hamza receives requirements from you.
Muhammad Hamza works on your project following the steps below.
Revisions may occur after the delivery date.
We will get in touch to align on the requirements and the plan
Starting working on it right away