L
Featured2026WIP
Learning Journal App
View project →An offline-first Flutter app for building a daily learning habit by writing down what you learned, one entry at a time.
flutterdartriverpodgo-routerdriftfreezed
Always develop & testing game
Hi, I'm
Deo Subarno.
I keep things simple on purpose. If something can be simpler, it should be. Over 4 years in software engineering, lately focused on game development, I've learned that fundamentals beat hype. Whether it's a web backend under heavy traffic or a game mechanic running at 60 FPS, I build fast, pragmatic, and reliable.
Featured Work
Featured Projects
2026Shipped
E-Library Management System
View project →A library management app I built with Laravel to try out some pragmatic clean architecture ideas without overcomplicating things.
laravel-13php-8.5tailwind-cssmysqlpest-php
2026Shipped
kochan.dev Portfolio
View project →A minimalist portfolio built with Deno Fresh and Tailwind CSS. Server-rendered by default, no client-side JavaScript unless needed, and a strict CSP.
denofreshpreacttailwind-cssmarkdown
From the Journal
Latest Writing
The Phantom Sandbox: 30 Commits to Fix a Two-Click Problem
My Deno Deploy pipeline broke with a cryptic 'Top-level await promise never resolved' error. After 30+ commits of debugging, the fix was deleting the app and creating a new one.
4 min readdenoci-cddebuggingdeno-deploy
The 100MB \r\n Bug: A Deno Deploy & GitLab CI Drama
How a tiny, invisible Windows line ending broke my deployment pipeline.
3 min readdenoci-cdwindowsdebugging
How I Set Up Ruby on Rails on Windows via WSL
How I set up Ruby on Rails on Windows using WSL, rbenv, and configured the MySQL gem. Written down so I don't have to figure it out again.
3 min readruby-on-railswslwindowsmysqljournal
How I Use Deno on Windows
Setting up a proper JavaScript and TypeScript environment on Windows used to be painful. Deno made it a lot simpler. Here's how I have it set up.
2 min readdenowindowstypescript