I will build secure backend and REST APIs using Node.js, Express and FastAPI

Ali Asif Free

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Service Description

Need a fast, secure and scalable backend for your web or mobile app? I am a Full Stack Software Engineer with over 4 years of professional experience building production ready backends and REST APIs for startups and businesses. I build with Node.js, Express, FastAPI and TypeScript, and I handle everything from API design and database modeling to testing, documentation and deployment.

What I can build for you
Custom REST APIs with clean, versioned endpoints, validation and proper error handling
Secure authentication with JWT, OAuth, social logins and role based access control
Database design and optimization with PostgreSQL, MongoDB and Firebase
Third party integrations such as payment gateways, email services, webhooks and external APIs
Real time features using WebSockets for chat, live updates and notifications
AI powered endpoints using OpenAI, GPT 4o, Claude and AI agents
Backends for SaaS platforms, marketplaces, dashboards and mobile apps
Bug fixing, refactoring and performance tuning for existing APIs

What you get
Clean, well structured and documented code
Full API documentation with Swagger or a Postman collection
Automated tests for key endpoints
Docker setup and deployment to your server or cloud platform
Support after delivery to make sure everything runs smoothly

Recent work
Tasky, an AI powered services marketplace with a Node.js backend featuring authentication, real time updates and a company onboarding workflow.
AI Surveillance System, a FastAPI backend powering a real time safety monitoring dashboard that processes live video for helmet compliance, line crossing and inspection alerts.

Tech stack
JavaScript, TypeScript, Python, SQL, Node.js, Express.js, FastAPI, PostgreSQL, MongoDB, Firebase, Redis, Docker, Git, CI CD pipelines, OpenAI API, Anthropic Claude

How it works
Share your requirements and I will review them, suggest the best approach and confirm the timeline. Once we agree, I will design the endpoints and data model, build and test the API, and keep you updated at every stage until it is live.

Send me a message before ordering so we can discuss your project and make sure I deliver exactly what you need.

Portfolio

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I will build secure backend and REST APIs using Node.js, Express and FastAPI

Frequently Asked Questions

What file formats do you deliver?

We typically deliver in FBX, OBJ, or GLTF formats for 3D models, and MP4 or MOV for animations. However, we can provide other formats upon request.

How many revisions are included?

The number of revisions depends on the package you select. Our Professional package includes 3 revisions, while Premium offers unlimited revisions.

What information do you need to start my project?

We need reference images, concept art, or detailed descriptions of what you want to create. For products, technical drawings or CAD files are helpful.

Can you work with my existing 3D models?

Absolutely! We can enhance, optimize, or animate your existing models. Just provide the source files.

Do you provide source files?

Source files are included in our Premium package. For other packages, they can be provided for an additional fee.

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Basic API Package

$30.00

Delivery in 3 days

Up to 5 REST API endpoints
Database setup and connection
Input validation and error handling
Postman collection
Source code

Contact Seller Monthly Hire

Standard Backend Package

$80.00

Delivery in 7 days

Up to 15 REST API endpoints
JWT authentication and user roles
Database design with PostgreSQL or MongoDB
One third party integration
Swagger API documentation
Source code

Contact Seller Monthly Hire

Premium Backend Package

$200.00

Delivery in 14 days

Complete backend with unlimited endpoints
Authentication, roles and permissions
Payment, email or AI integrations
Real time features with WebSockets
Automated tests and full API docs
Docker setup and cloud deployment
14 days of support after delivery

Contact Seller Monthly Hire

Custom

Pricing

Negotiable Delivery Timeline

Tailored to your specific needs
Flexible budget options
Custom feature set
Direct communication with creator
Personalized timeline

Discuss Custom Requirements

I will build secure backend and REST APIs using Node.js, Express and FastAPI

Service Description