Is this job worth applying to?

Pay

Below typicalTops out at $35/hr. The typical top rate across 237 priced coding listings is $90/hr.

Getting in

Some screeningVaries; several days to weeks. Expertise or language fluency matching a listed project.

Steady work

Work is patchyHours can be very low.

Payout record

Pays on timeSchedule: varies by project. Payment method not published.

Freshness

Over a year oldPosted over a year ago. Still listed on Invisible on Nov 6, 2026.

Where you live

Named countries onlyOpen in Argentina, Poland, United Kingdom and 2 more.

The job description

Are you a Kotlin expert eager to shape the future of AI? Large-scale language models are evolving from chatbots into powerful developer assistants capable of reasoning about complex software systems. With high-quality engineering data, tomorrow’s AI can support developers in solving real-world problems faster and more accurately. That training data begins with you—your coding expertise will help power the next generation of AI.

We’re looking for Kotlin specialists who can take real-world engineering scenarios—such as bug reports or feature requests in a Git repository—and produce clean, efficient, and idiomatic solutions using the Kotlin programming language. You’ll create high-quality code patches that reflect modern Android development practices and ensure technical correctness, maintainability, and clarity.

You should have hands-on experience with modern Android and Kotlin development, including Jetpack Compose, Kotlin Coroutines, and Jetpack libraries such as Room, WorkManager, Datastore, ViewModel, and Hilt. Familiarity with build.gradle configuration, dependency management, and networking libraries such as OkHttp, Retrofit, and Coil is also important. Experience with Android multimedia tools (CameraX, ExoPlayer, Media3) is a plus.

On a typical day, you’ll evaluate AI-generated code, correct errors, implement optimized Kotlin solutions, and document best practices that demonstrate modern Android design patterns and coding conventions.

A strong background in Android software development is required, with demonstrable experience building and maintaining production-level Kotlin applications. Clear, structured communication and the ability to explain technical decisions are essential.

We offer a pay range of $35+ per hour, with the exact rate determined after evaluating your experience, expertise, and geographic location. Final offer amounts may vary from the pay range listed above. As a contractor, you’ll supply a secure computer and high-speed internet; company-sponsored benefits such as health insurance and PTO do not apply.

Job title: Master - Kotlin Coding Specialist – AI Trainer
Employment type: Contract
Workplace type: Remote
Seniority level: Mid - Senior Level

How do you apply to Invisible?

Apply on Invisible

The Apply button opens this post on Invisible's own site. You apply with them, not with Rubric. Timing: varies; several days to weeks.

Get through screening

What Invisible asks for after you apply:

Browse open projects on Meridial
Join the network and complete your profile, including country
Take the skills assessment or interview for the project
Wait to be matched and onboarded to a project team

Start work and get paid

Pay schedule: varies by project. Ask how they pay you, too. You're paid for the work they hand out, not a fixed salary.

Invisible also needs

Expertise or language fluency matching a listed project
Reliable internet

Red flags

Red flagClients or projects disappearing for months with no update
Red flagSudden project cancellations

What is Invisible like to work for?

AI training and operations company that hires freelance AI trainers through its Meridial expert network, mostly onto team-based projects.

Advertised pay	$6–65/hr
Getting in	Some screening
Application takes	Varies; several days to weeks
How you get paid	Varies by project
Payout record	Pays on time
Countries	Each listing names the countries it accepts, some covering about 145 countries. Invisible has posted India-only roles (coding, Telugu, Tamil, Marathi, Hindi), with pay adjusted by location.

Listings show $6–65/hr and the rate depends on your country; many entry projects pay around $15–25/hr.