Kotlin Coding Specialist – Freelance AI Trainer

Invisible Technologies

. Take real-world engineering scenarios such as bug reports or feature requests in Git repositories and produce clean, efficient, idiomatic Kotlin solutions .

Posted 11/4/2026contractRemote • United KingdomMid-LevelSenior💰 $35 per hourWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in Kotlin and modern Android development, with a strong focus on producing clean, efficient code and implementing best practices in application design. Capable of evaluating and optimizing AI-generated code while ensuring maintainability and technical correctness.

Highest-signal resume keywords

Kotlin ExpertiseModern Android DevelopmentJetpack ComposeKotlin CoroutinesAndroid Software Development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

KotlinAndroid DevelopmentCode OptimizationCode DocumentationProduction-Level Application Development

Soft Skills

Clear CommunicationStructured Communication

Tools & Technologies

Jetpack LibrariesRoomWorkManagerDatastoreViewModelHiltOkHttpRetrofitCoilCameraX

Industry Keywords

Android Design PatternsCoding ConventionsDependency ManagementMultimedia ToolsFeature Requests

Tech Stack

Tools & technologies

AndroidGradleKotlin

About the role

Key responsibilities & impact

Take real-world engineering scenarios such as bug reports or feature requests in Git repositories and produce clean, efficient, idiomatic Kotlin solutions
Create high-quality code patches reflecting modern Android development practices
Ensure technical correctness, maintainability, and clarity
Evaluate AI-generated code and correct errors
Implement optimized Kotlin solutions
Document best practices demonstrating modern Android design patterns and coding conventions

Requirements

What you’ll need

Kotlin expertise
Hands-on experience with modern Android and Kotlin development
Experience with Jetpack Compose, Kotlin Coroutines, and Jetpack libraries including Room, WorkManager, Datastore, ViewModel, and Hilt
Familiarity with build.gradle configuration and dependency management
Familiarity with networking libraries including OkHttp, Retrofit, and Coil
Strong background in Android software development
Demonstrable experience building and maintaining production-level Kotlin applications
Clear, structured communication and ability to explain technical decisions
Experience with Android multimedia tools such as CameraX, ExoPlayer, and Media3 is a plus

Benefits

Comp & perks

Pay range of $35+ per hour, with the exact rate determined after evaluating experience, expertise, and geographic location
Secure computer and high-speed internet supplied by the contractor
Company-sponsored benefits such as health insurance and PTO do not apply