Case Study · Jeffrey James Idodo

JeffOS

An operating-system-style portfolio, built from scratch.

React 19TypeScriptSupabasePWAZustand

Problem

How do you prove engineering range, not just claim it?

Constraints

Real backend, real realtime, real performance/accessibility budgets — not a demo.

Architecture

React 19 windowing OS, capability-based responsive shells, Supabase realtime via a counter pattern, PWA, tracked migrations, security-hardened RLS.

Solution

A working web OS with apps, realtime visitor counts, themes, and a security/scalability-audited backend.

Outcome

Proof of systems thinking — the portfolio is itself the engineering demo.

Open the full portfolio → JeffOS ← All work