React Native
One TypeScript codebase for both stores. Best when speed to market and a shared web team matter most.
TypeScript · Expo · Reanimated
Shared code where it helps. Native where it matters.
I’m Asep Jumadi. I design and build iOS and Android apps with React Native, Kotlin Multiplatform and SwiftUI — and pick the right one for each product.
React NativeKotlin MultiplatformSwiftUIJetpack Compose
Three ways to ship. One standard.
The right tool depends on your team, timeline and how native the experience needs to feel. I’m fluent in all three.
Kotlin Multiplatform
Share business logic, networking and data layers in Kotlin while each platform keeps a fully native UI.
Kotlin · Ktor · SQLDelight · Compose
SwiftUI
Pure native iOS when the product lives on Apple platforms — widgets, Live Activities and smooth, system-true interactions.
Swift · Combine · async/await
Apps in people’s pockets.
React NativeiOS + Android
Kingdom Theology
[One line on the problem, what you built and the result.]
Visit →
React NativeAndroid+Ecommerce
Yokulak
[One line on the problem, what you built and the result.]
Visit →
React NativeiOS + Android
Perpus Kita Android
[One line on the problem, what you built and the result.]
Visit →From first commit to the App Store.
- STEP 1ArchitectChoose cross-platform or native, then define modules, state and data flow.
- STEP 2BuildClean, typed code with reusable components and accessible UI.
- STEP 3TestUnit, UI and device testing so both platforms behave the same.
- STEP 4ReleaseCI/CD pipelines, store submissions and monitoring after launch.
Where I’ve built.
Download CV (PDF) →Mobile Engineer · LIVINODEDeveloped and maintained cross-platform iOS and Android apps in React Native, UX and reduced bug reports. • Shipped 3 production mobile projects on schedule: RCH Sound (mobile app + backend), Good And Bless (mobile + admin dashboard), and Kingdom Theology (mobile + full-stack admin)
Mobile Engineer · PT Oktal Teknology Indonesia• Led development of Yokulak (e-commerce) and Perpuskita (digital library), shipping both to production on iOS and Android from a single React Native codebase, significantly cutting development cost.
• Integrated annotation platform APIs into Perpuskita
Mobile Engineer · PT Ramco Buana Informatika• Built and rebranded mobile apps end-to-end for e-commerce and sustainable energy clients using React Native.
• Applied UX patterns from industry-leading platforms (Sembcorp Power, eToro) to raise product adoption and retention.
Have an app idea? Let’s ship it.
Open to freelance projects and full-time mobile roles — remote or in Indonesia.