You will get I will build a FastAPI REST API
Rising Talent
Rising Talent
Project details
I will build a secure, scalable, and well-documented FastAPI REST API tailored to your business requirements.
This project includes API endpoint development, PostgreSQL database integration, JWT authentication, request validation, error handling, and interactive Swagger documentation. Whether you need a backend for a web application, SaaS platform, AI solution, or internal business system, I can deliver clean and maintainable code following industry best practices.
What you can expect:
-FastAPI REST API Development
-PostgreSQL Database Integration
-JWT Authentication & Authorization
-API Documentation (Swagger/OpenAPI)
-Input Validation & Error Handling
-Clean, Maintainable Source Code
-Deployment Support
I am a Full-Stack Developer specializing in Python, FastAPI, PostgreSQL, React, Docker, and cloud deployment. My focus is building reliable backend systems that are secure, scalable, and easy to extend as your business grows.
Let's build your API the right way.
This project includes API endpoint development, PostgreSQL database integration, JWT authentication, request validation, error handling, and interactive Swagger documentation. Whether you need a backend for a web application, SaaS platform, AI solution, or internal business system, I can deliver clean and maintainable code following industry best practices.
What you can expect:
-FastAPI REST API Development
-PostgreSQL Database Integration
-JWT Authentication & Authorization
-API Documentation (Swagger/OpenAPI)
-Input Validation & Error Handling
-Clean, Maintainable Source Code
-Deployment Support
I am a Full-Stack Developer specializing in Python, FastAPI, PostgreSQL, React, Docker, and cloud deployment. My focus is building reliable backend systems that are secure, scalable, and easy to extend as your business grows.
Let's build your API the right way.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$25
|
Standard
$50
|
Advanced
$75
|
|---|---|---|---|
| Delivery Time | 3 days | 5 days | 7 days |
Number of Revisions | 2 | 3 | 5 |
Number of Pages | 1 | 3 | 4 |
Design Customization | - | - | |
Content Upload | - | - | - |
Responsive Design | - | ||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$20 - $40
Additional Revision
+$15
2 reviews
(2)
(0)
(0)
(0)
(0)
This project doesn't have any reviews.
es
enner s.
Aug 17, 2026
3-Face Agentic Marketing System
This has been part of an AI system to promote our platform, and Piyush has stepped up to the task.
es
enner s.
Aug 9, 2026
Ai receptionist-Simply complete last items
Working with Piyush was a great experience his oriented he communicates clearly, and the quality of his work is excellent. His knowledge and skills are very noticeable in the work that he does. A+ performance.
About Piyushkumar
AI SaaS & Full-Stack Developer | FastAPI, React, Stripe, AWS, Docker
Greater Sudbury, Canada - 9:00 am local time
I work across the full development lifecycle — from backend architecture and API development to AI integrations, payments, authentication, database design, deployment, debugging, and production stabilization.
Recently, I worked on a production AI Receptionist SaaS platform where businesses can subscribe to plans, provision AI receptionists, receive customer calls through dedicated AI phone numbers, manage usage, view call logs, and control billing.
My work on this platform included:
• AI & Telephony Integration — Retell AI agents, phone numbers, inbound call routing, webhooks, call logs, summaries, and voicemail fallback
• SaaS Billing — Stripe Live checkout, subscription plans, webhook processing, billing-cycle handling, usage tracking, overage preferences, and secure production payment testing
• Backend Architecture — REST APIs, service-layer architecture, webhook idempotency, tenant isolation, usage accounting, call admission logic, feature flags, and fail-safe production behavior
• Production Deployment — Vercel frontend deployment, Render backend deployment, custom production domains, environment configuration, MongoDB Atlas, CORS, and production debugging
• Security — webhook signature verification, secure demo sessions, read-only demo protection, SSRF-safe website scanning, tenant authorization, and secret management
• Frontend Development — React, TypeScript, responsive SaaS dashboards, pricing interfaces, billing settings, usage dashboards, and mobile-friendly UI
I also build AI-powered applications using Python and FastAPI, including RAG systems, semantic search, embeddings, vector databases, structured LLM outputs, and AI-assisted workflows.
My core technologies include:
Python • FastAPI • Node.js • Express • TypeScript • React • REST APIs • PostgreSQL • MongoDB • Docker • AWS • Stripe • Retell AI • LLM APIs • RAG • Vector Databases • Vercel • Render • GitHub Actions
I can help with:
• AI SaaS application development
• AI API and LLM integration
• FastAPI / Node.js backend development
• React + TypeScript applications
• Stripe payment and subscription integration
• Voice AI / AI receptionist systems
• REST API development and integration
• Webhook architecture
• SaaS authentication and multi-tenant systems
• RAG and semantic search systems
• Production deployment and debugging
• Existing SaaS stabilization and feature development
If you already have an application that needs fixing, scaling, deploying, or integrating with AI services, I can also work directly with an existing codebase rather than rebuilding everything from scratch.
Steps for completing your project
After purchasing the project, send requirements so Piyushkumar can start the project.
Delivery time starts when Piyushkumar receives requirements from you.
Piyushkumar works on your project following the steps below.
Revisions may occur after the delivery date.
Analyze project requirements, endpoints, authentication, and database need.
Develop API endpoints, business logic, validation, and database models.