Full case studies and shorter technical notes, mixed together. Open any of them to read the story — including the parts that failed first.
A paid UTBK tryout platform: students buy a bundle, sit timed subject simulations, then read the explanations — with an admin panel behind it for the question bank, the catalogue, and payments. A full rewrite from Laravel to Next.js 16.
A two-sided KOL marketplace with end-to-end campaign management: find creators, run the campaign, review drafts, close with an invoice. React, NestJS, and Supabase.
An Android personal finance app for tracking income and spending, with budgets, savings goals, and a pairing system for parental oversight. React Native (Expo) and Firebase.
A native Android music client for YouTube audio: search, queue, offline downloads, personalised rows, and optional cloud sync. Kotlin, Jetpack Compose, Media3, and Room.
A task manager where one typed Indonesian sentence becomes a scheduled task — read by a dictionary of about 1,900 entries you can open and edit, not by a language model, and written locally first so nothing ever waits on a network.