How to Get a Job as a Kotlin Developer: Tips and Resume

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Introduction

Kotlin is a modern statically typed programming language that runs on the JVM platform and is actively used for developing Android applications, server-side solutions, and even multiplatform projects. Since Google announced Kotlin as an official language for Android in 2019, the demand for specialists in this field has been steadily growing. However, competition in the market is high, and simply knowing the syntax is not enough. In this article, we will analyze how to properly prepare for a job search, write a resume, pass an interview, and provide some practical examples in Kotlin.

1. Preparation: What a Kotlin Developer Needs to Know

Before sending out your resume, make sure you have fundamental knowledge and practical experience. We have highlighted three key areas:

Language and Ecosystem Basics

Kotlin Syntax: null safety, extension functions, data classes, sealed classes, coroutines.
Standard Library: collections, sequences, scope functions (let, apply, run, with, also).
Build Tools: Gradle (Kotlin DSL), Maven.
Frameworks: Ktor (server), Spring Boot (with Kotlin support), Android SDK (if Android).

Practical Skills

Employers expect you to be able not only to write code but also to:

Work with version control systems (Git, GitHub/GitLab).
Cover code with tests (JUnit, MockK, Kotest).
Understand SOLID principles and design patterns.
Work with databases (Room, Exposed, Hibernate).

Code Example: Simple REST API with Ktor

This example demonstrates a basic server in Kotlin using the Ktor framework. Such code is often requested to be written during an interview to test understanding of coroutines and routing.

import io.ktor.server.engine.*import io.ktor.server.netty.*import io.ktor.server.routing.*import io.ktor.http.*import io.ktor.server.response.*import io.ktor.server.application.*

fun main() {    embeddedServer(Netty, port = 8080) {        routing {            get("/") {                call.respondText("Hello, Kotlin!", ContentType.Text.Plain)            }            get("/user/{id}") {                val userId = call.parameters["id"] ?: "unknown"                call.respondText("User ID: $userId")            }        }    }.start(wait = true)}

2. Writing a Resume: What to Include and How to Stand Out

Your resume is your first contact with an employer. It should be structured, concise, and contain keywords that recruiters will use to find you in databases. Here are the main sections you should include:

Header and Contact Information

State a clear job title: "Kotlin Developer (Android/Backend)", level (Junior, Middle, Senior). Don't forget links to GitHub, LinkedIn, or a personal portfolio website.

Skills

List technologies in order of relevance. Example for an Android developer:

Languages: Kotlin, Java (basic).
Frameworks: Android SDK, Jetpack Compose, Ktor.
Tools: Gradle, Git, Firebase, Retrofit.
Databases: Room, SQLite.
Testing: JUnit, MockK.

Work Experience and Projects

Describe not just responsibilities, but results. Use action verbs: "developed", "optimized", "implemented". Example:

Developed an authorization module in Kotlin using coroutines and Ktor, reducing load time by 30%.
Migrated legacy code from Java to Kotlin, improving readability and reducing the number of NullPointerExceptions.