Case · Mobile · GovTech
Three Flutter apps — public, enforcement, and command centre — for Sarawak's COVID-era border-entry approval system.
During COVID, entering Sarawak meant approval through one mandatory state gate — a single system serving three very different users: travellers, frontline officers, and a command centre.
Front-end engineer, Ukuya — top contributor across the three apps (266 of 499 commits)
Shipped three production Flutter apps that ran the mandatory entry-approval flow end to end — apply, verify at the border, and decide — through the pandemic.
When Sarawak controlled its borders during COVID-19, every non-Sarawakian had to be approved before entering. enterSarawak was the state's official system for that — the single mandatory gate for entering the state, run by the State Disaster Management Committee — and it had three sides: the public applies and carries a QR entry pass, enforcement officers verify and process arrivals at entry points, and a command centre reviews and decides. I built the front end at Ukuya — the largest contributor across all three Flutter apps, with 266 of the 499 commits on an eight-person team.
Travellers, officers, and the command centre have completely different jobs, so each got its own app instead of one overloaded build — the public app tuned for applying and carrying a pass, the officer app for fast verification, the admin app for review and decisions.
The three apps run on a common in-house package set — auth/OAuth, DI, API clients, form fields, validators, i18n — versioned through a private pub server. Shared behaviour lives in one place, so a fix or design change lands across all three apps instead of being copy-pasted into drift.
Freezed for typed models and auto_route for generated routing keep a large multi-app codebase — 365+ Dart files across the three apps — navigable, with the compiler catching breakage that would otherwise need a test.
Three production Flutter apps that carried Sarawak's mandatory border-entry approval through the pandemic — for the public, frontline officers, and a command centre. It's the work that taught me to keep three apps coherent across one repo and a shared package set while shipping under real public-health deadlines.