Kotlin

What is Kotlin, really?

Kotlin is what Java should have been if it was designed in 2020. JetBrains made it, Google adopted it as the official Android language in 2017, and almost every new Android app is now Kotlin-first. It runs on the same JVM as Java, so you keep all the existing libraries.

Why learn it in 2026?

India has more Android phones than the entire population of Europe. The Android job market is enormous and Kotlin is now the standard. Most product companies in Bangalore (Swiggy, Zomato, Flipkart) use Kotlin for their Android apps.

What it looks like

// Android compose UI
@Composable
fun Greeting(name: String) {
    Text(
        text = "Hello, $name!",
        fontSize = 24.sp,
        color = Color.Blue
    )
}

▶ Try this code live →

What you can build with it

• Android apps
• Cross-platform mobile (KMM)
• Server-side (Ktor)
• Web frontends (Kotlin/JS)

Major apps using Kotlin

These are real platforms with public engineering posts confirming they use Kotlin in production:

Featured platforms in our database

Tap any to see the full stack:

How to get started with Kotlin in 5 steps

1. Install Kotlin Download Kotlin from the official site or use a package manager like Homebrew (Mac) or apt (Linux).
2. Set up your editor Install VS Code (free) and add the official Kotlin extension for syntax highlighting and autocomplete.
3. Write Hello World Create a file, write your first 'Kotlin Hello World' program, and run it from the terminal.
4. Build a small project Pick something tiny — a calculator, a to-do list, a number guessing game. Building beats reading.
5. Join a community Join the official Kotlin Discord, subreddit, or Stack Overflow tag. Ask questions when stuck.

Should you learn it first?

Reasonable choice. Strong job market and a manageable learning curve. Make sure your goals match what Kotlin actually builds.

Frequently Asked Questions about Kotlin

Sources & References

Salary ranges, popularity data, and tech stack information on this page were verified using:

• Official Kotlin documentation — Primary language reference and getting started guides
• Stack Overflow Developer Survey 2025 — Salary, popularity, and trend data
• GitHub Octoverse 2025 Report — Most-used languages and growth trends
• Naukri.com & LinkedIn India job listings — India salary verification (Bengaluru, Hyderabad, Mumbai, Pune)
• OneCity internal hiring data (2020–2026) — 650+ client projects across web, mobile, and AI work

Last verified: April 26, 2026. See an error? Email hello@onecity.co.in and we will fix it.

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