ERP Micro-Entreprise

01 / Brief

Solution

This project is an internal ERP I built for my own micro-entreprise operations. Before it, I was maintaining Excel files and storing business information locally on my laptop, which made tracking less reliable and fragmented across files. I built the tool end-to-end myself (architecture, UX, business logic, and implementation) with Claude Code as a coding assistant. The goal was to create a system that matches my own standards for operating my freelance activity while moving fast with vibecoding. In under 6 hours, I shipped a usable ERP covering invoicing, client tracking, income/expense tracking, tax simulation, and calendar-based deadline management.

02 / Constraints

Problem

• Designing a complete ERP architecture under strong time constraints
• Consolidating essential freelance operations into one coherent workflow
• Handling uncertainty around French tax information and interpretations
• Keeping the UX simple while covering invoicing, tracking, and tax simulation

03 / System

Architecture / workflow

• Built end-to-end as a solo internal tool
• Invoicing with status tracking and client follow-up
• Income and expense tracking in a single workflow
• Tax simulator for micro-entreprise operations
• Calendar view for operational deadlines
• Delivered in under 6 hours

04 / Evidence

Results / impact

• Built and shipped a functional ERP in under 6 hours
• Made administrative operations 3x faster
• Improved tracking reliability by centralizing operations in one internal tool

05 / Gallery

Visual references