E-Commerce Backend API

Role:Backend Developer

Year:2025

Overview

Features database models constructed in FastAPI using SQLModel. Implements transactional safety checks for inventory depletion during user checkouts, logging operations via custom interceptors.

Problem Statement

E-commerce databases often encounter race conditions where multiple customers attempt to purchase the final item in stock simultaneously.

Proposed Solution

Configured inventory depletion checks wrapped inside database transactions, rolling back checkout processes if stock levels drop below zero.

System Architecture

FastAPI backend using SQLAlchemy database transactions to ensure database consistency during concurrent checkout routines.

API Client Request

FastAPI routing

SQLAlchemy ORM

MySQL Relational DB

Key Features

Transactional order processing
MySQL inventory relational mapping
Category sorting and filtering queries
Order receipt serialization formats
Dockerized container builds for quick deployment

Challenges Faced

Securing database concurrency levels and testing edge case database inventory locks under simulated workloads.

What I Learned

Mastered relational constraints, transaction isolation levels, and model validation using Pydantic schemas.

Gallery & Mock Previews

Mock System Frame

Active Database log

Technology Stack

Python

FastAPI

SQLAlchemy

MySQL

Docker

Development StatusCompleted

Source Code

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