In-House App · 2025
Work OS
Workspace & Project Management SaaS
Enterprise-grade monorepo workspace engine featuring Next.js 15, React 19, Zustand & PWA on the frontend with a 28-module FastAPI, PostgreSQL 16 & Redis 7 backend.

- Role
- System Architect & Full-Stack Developer
- Client
- In-House SaaS
- Year
- 2025
- Category
- In-House App
Overview
Work OS is an end-to-end workspace and project management platform architected as a modular monorepo. The web client (apps/web) is built on Next.js 15, React 19, Zustand, and React Query with offline PWA support, while the high-performance backend (apps/api) runs on FastAPI (Python) across 28 decoupled domain modules backed by PostgreSQL 16 and Redis 7. It powers real-time cross-component communication, strict schema validation, distributed caching, and end-to-end agency workflow orchestration without third-party bloat.
Highlights
- 01
Next.js 15 & React 19 frontend with Zustand state & React Query caching
- 02
FastAPI backend architecture spanning 28 decoupled domain modules
- 03
PostgreSQL 16 relational persistence & Redis 7 distributed cache layer
- 04
Monorepo package boundaries with strict cross-component data flow & PWA