Angga Pratama
Mobile developer, every framework.
Nine years of shipping production mobile software across Android, iOS, Flutter, and React Native. Transaction systems, EDC platforms, and open-source libraries.
Angga Pratama
Android · iOS · Flutter · React Native
Recent
Latest from the workshop.
Blog
All posts- From four repos to a monorepoConsolidating four byte-identical app repos into one shared core plus thin app shells, the expo-router and Metro problems it surfaced, and validating the migration with real bundles.
- Shipping, then listeningThe first round of real tester feedback and the small, high-leverage fixes it produced: grid spacing, free typing, jump buttons, easing early ads, and a well-timed review prompt.
- The Play Store gauntletEverything between a finished app and a live listing: store assets, data safety, content rating, the target-audience trap, app-ads.txt, and the testing tracks, from real experience.
Blog
All posts- From four repos to a monorepoConsolidating four byte-identical app repos into one shared core plus thin app shells, the expo-router and Metro problems it surfaced, and validating the migration with real bundles.
- Shipping, then listeningThe first round of real tester feedback and the small, high-leverage fixes it produced: grid spacing, free typing, jump buttons, easing early ads, and a well-timed review prompt.
- The Play Store gauntletEverything between a finished app and a live listing: store assets, data safety, content rating, the target-audience trap, app-ads.txt, and the testing tracks, from real experience.
Carousels
All carousels- Cut Your Claude Bill By 90%Two tiny tools, one habit. RTK filters bash output before it reaches the model, Caveman mode compresses the model's replies. Together they take 90% off a typical session.
- Components That Scale Like ImagesA short CSS pattern that makes a component look identical at any size, like an image being resized. Container queries plus an em cascade, no breakpoints, no JS.
- Cron Jobs in Five MinutesIf you keep running scripts manually, it's time. Five asterisks, one command, and your computer takes over the boring part.
Decks
All decks- Cut Your Claude Bill By 90%A short editorial deck on saving Claude tokens with two small tools. RTK trims noisy bash output before it reaches the model; Caveman compresses Claude's replies. Combined they cut a typical session by ~90%.
- Cron Jobs, ExplainedA short editorial deck on cron jobs for engineers who haven't written one yet. Covers the mental model, the syntax, three real examples, the modern wrappers (Vercel, GitHub Actions), and the two gotchas everyone trips on.
- Container Queries & The Em CascadeA short editorial deck on the CSS pattern that makes components scale uniformly, the way an image being resized does, using container queries, cqi units, and an em cascade.
About
I build software that has to survive merchants, OS upgrades, and weeks without anyone watching it.
Started shipping mobile apps in 2016. Specialised in EDC payment systems and Android transaction platforms across half a dozen hardware vendors. These days I mix that production engineering background with AI-assisted workflows on a remote team.
- Based
- Bogor, Indonesia
- Working with
- Remote team in Australia
- Stack
- Kotlin, React, TypeScript
- Side projects
- Workflow automation, games, chess