Hobby

I design ERPs for fun

HRT Systems is a full-suite ERP for small and medium businesses: Xero-simple on the surface, enterprise-grade underneath. It pulls together years of working inside NetSuite, Oracle Fusion, Xero and MYOB, and seeing where each one falls short.

It's where I show the systems and functional analyst side of my work: understanding how a business runs, then designing the system around it.

View the code on GitHub →

The HRT Systems repository on GitHub: README with the tech stack, and a docs folder of architecture and SDLC papers

Tap the screenshot to open the repository on GitHub.

Read the design papers

Every phase is written up before it's built. Start with any of these, or browse all the docs.

Planning & requirementsTurning business needs into scope
Technical architecture blueprintHow the whole system fits together
Dimensional chart of accountsAccounting design, not just code
Payroll & HRIS integrationsPayroll rules as a system
Security & controlsInternal controls built in
Reporting & analyticsFrom ledger to management reports
Database designMulti-tenant data model

Tech stack

Backend: Python + FastAPI, modular monolith
Database: PostgreSQL: row-level security (Standard) and schema per tenant (Pro)
Workflows: Temporal.io
Frontend: React / Next.js