Fixion – Customers and Artisans Marketplace Backend

Overview

A FastAPI-powered platform connecting artisans and customers, featuring secure authentication, wallet, and admin roles.

My Role & Impact

• Led backend architecture and API design
• Implemented secure JWT auth (access/refresh), password hashing, and RBAC
• Designed database schema & migrations (SQLAlchemy + Alembic)
• Structured codebase with routers, schemas, services, models, utils

Tech Stack

FastAPI, Python, PostgreSQL, SQLAlchemy, Alembic, Pydantic, Uvicorn

Key Endpoints (sample)

• POST /auth/signup-customer, /auth/signup-artisan, /auth/login
• GET /users/me, PATCH /users/me
• POST /jobs, GET /jobs, POST /jobs/{id}/bids
• POST /wallet/fund, POST /wallet/transfer, GET /wallet/transactions
• Admin: GET /admin/users, PATCH /admin/users/{id}, DELETE /admin/users/{id}

Code & Links

• GitHub: https://github.com/fixion-platform/fixion-platform

Challenges & Outcomes

• Strict Pydantic validation reduced runtime errors
• Service-layer separation made business logic reusable/testable
• JWT expiry & refresh flow prevented auth edge cases