What do Kotlin development services cover at Miracuves?
Kotlin is one language with three jobs, and a Kotlin development service should cover all of them. On Android, Kotlin with Jetpack Compose is the language Google recommends for new apps. With Kotlin Multiplatform (KMP), the same Kotlin code - business rules, networking, storage - also compiles for iOS. On the server, Ktor or Spring Boot run Kotlin on the JVM.
Miracuves works in all three. A typical engagement is a Compose Android app, a KMP module that an iOS team calls from Swift, a Ktor API behind both, or a mix. If you only need an Android app and have no view on the language, our Android App Development service is the simpler starting point; this page is for when Kotlin itself is the requirement.
When is Kotlin the right choice, and when is it not?
Kotlin pays off when the product lives close to the Android platform, or when one Kotlin team should own more than one layer of the stack.
- Choose Kotlin for Android-first apps that depend on background GPS, Bluetooth, WorkManager sync or OEM-specific behavior.
- Choose KMP when iOS and Android must run identical business rules - pricing, validation, offline sync - and each should keep a native UI.
- Choose Ktor when the backend team already writes Kotlin and wants data models shared with the apps.
- Skip Kotlin if you want one of our ready-made platforms in 6 working days: those ship as Flutter apps, and a Kotlin port only makes sense for a specific native need.
- Skip it for an iOS-only product - Swift is the better fit there.
What does Kotlin Multiplatform share, and what stays native?
KMP shares the layers users never see: data models, API clients built on Ktor Client, repositories, validation rules and local storage through multiplatform libraries such as SQLDelight. The shared module compiles to a library for Android and to a native framework that iOS code calls from Swift, so each app keeps its own UI toolkit - Compose on Android, SwiftUI on iOS.
Compose Multiplatform can share the UI as well, which suits internal tools and products where an identical look on both platforms is acceptable. Miracuves decides module by module how much to share. The realistic share depends on how much of your app is logic rather than screens, and we state it in the scope before work starts.
Can Kotlin run the backend as well as the app?
Yes. Kotlin runs on the JVM, so a backend can use Ktor, the lightweight JetBrains framework built on coroutines, or Spring Boot, which supports Kotlin fully. Miracuves uses Ktor with Exposed for lean APIs that sit behind mobile apps, and Spring Boot when a client's platform already runs on it or needs its larger ecosystem.
The practical gain is one language across the stack: request and response models can live in a shared KMP module used by the Android app, the iOS app and the server, so a renamed field breaks the build instead of production. The trade-off is JVM hosting, which usually needs more memory at idle than a comparable Node.js or Go service; we size the servers in the quote.
Should you hire Kotlin developers or a Kotlin development company?
Hiring Kotlin developers directly works when you already have an Android lead who sets the module structure, reviews every pull request and owns Play Console releases. Without that person, freelancers make those calls one by one, and the Gradle build, the Hilt setup and the release signing drift apart.
At Miracuves you contract with the company, not with individual developers. A Kotlin engineer, a backend engineer, QA and a project manager work to a written scope with weekly sprint demos, and the Gradle project, upload keys and full source code are handed to you. For continuing work, the Ongoing Kotlin Development retainer from $2,299/month assigns a dedicated team instead of billing hours.
What does Kotlin development cost at Miracuves?
The figures are the ones in this page's pricing box. A Kotlin port of a ready-made platform, when a native need justifies it, starts from $3,699 and depends on scope. A custom Kotlin MVP typically runs $10,000-$35,000 over 2-8 weeks. Ongoing work is from $2,299/month.
Inside a custom build, the budget moves with the number of KMP shared modules, the complexity of the Compose UI, the size of the offline Room schema, the count of Ktor endpoints, payment SDKs such as PIX, the number of languages and the range of OEM devices in the QA matrix. Every quote is written before payment.
Can Miracuves migrate a Java Android app to Kotlin?
Yes. Kotlin calls Java and Java calls Kotlin inside the same module, so an app does not need a rewrite to move over. Miracuves converts it in steps: new features are written in Kotlin from the first sprint, older Java classes are converted when they are touched, and callback-based code moves to coroutines and Flow along the way.
We start with a written audit of the project - Gradle and Android Gradle Plugin versions, target API level, deprecated libraries and any keys committed to the repository - then quote the migration in stages, so the app keeps shipping to Google Play while its code changes underneath.
