Freelance Software Developer (Kotlin) - AI Trainer

December 12, 2025
Open
Open
Location
Vietnam
Occupation
Part-time
Experience level
Mid-level
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Job Summary

Mindrift offers a fully remote, freelance opportunity for coding specialists residing in the specified country to contribute to cutting-edge AI training projects with a focus on Kotlin development. As part of a diverse global platform, you’ll create challenging prompts, define evaluation criteria, and refine AI model responses. Compensation is competitive, with rates up to $41/hour, and flexible part-time hours that fit around existing professional or academic commitments.

Ideal candidates possess a Bachelor’s or Master’s degree in a relevant technical field, a minimum of three years of Kotlin experience, and a C1+ level of English proficiency. Proficiency with the JVM ecosystem, Java interoperability, Android SDK, Jetpack Compose, and modern development practices (MVVM, Clean Architecture, DI frameworks, CI/CD, cloud platforms, secure coding, and Agile methodologies) is required. The ability to adapt quickly and leverage AI-assisted development tools is essential.

Applicants must be currently based in the designated country, submit resumes in English, and indicate their level of English proficiency. This is an excellent way to shape the future of AI, strengthen your portfolio, and work alongside top innovators—all while enjoying the flexibility of remote, freelance work.

Highlight
Highlight

This opportunity is only for candidates currently residing in the specified country. Your location may affect eligibility and rates. Please submit your resume in English and indicate your level of English proficiency.

At Mindrift, innovation meets opportunity. We believe in using the power of collective intelligence to ethically shape the future of AI.

What we do

The Mindrift platform connects specialists with AI projects from major tech innovators. Our mission is to unlock the potential of Generative AI by tapping into real-world expertise from across the globe.

About the Role

GenAI models are improving very quickly, and one of our goals is to make them capable of addressing specialized questions and achieving complex reasoning skills. If you join the platform as an AI Tutor in Coding, you’ll have the opportunity to collaborate on these projects.

Although every project is unique, you might typically:

  • Generate prompts that challenge AI.
  • Define comprehensive scoring criteria to evaluate the accuracy of the AI’s answers.
  • Correct the model’s responses based on your domain-specific knowledge.

How to get started
Simply apply to this post, qualify, and get the chance to contribute to projects aligned with your skills, on your own schedule. From creating training prompts to refining model responses, you’ll help shape the future of AI while ensuring technology benefits everyone.

  • You hold a Bachelor's or Master’s Degree in Computer Science, Software Engineering, Software Development, Computer Engineering, Information Technology or other related fields.
  • You have at least 3 years of Kotlin development experience (Android or server-side).
  • Your level of English is advanced (C1) or above.
  • Strong knowledge of JVM ecosystem and Java interoperability.
  • Experience with Android SDK, Jetpack Compose, modern architecture (MVVM, Clean Architecture).
  • Proficiency with coroutines, flows, async programming.
  • Familiarity with DI frameworks (Dagger/Hilt/Koin).
  • Git workflows, code reviews, Agile/Scrum.
  • CI/CD pipelines, Docker, cloud platforms (AWS/Azure/GCP).
  • Secure coding practices (OWASP).
  • Debugging and optimization skills.
  • Ability to leverage AI-assisted development tools.
  • You are ready to learn new methods, able to switch between tasks and topics quickly and sometimes work with challenging, complex guidelines.
  • Our freelance role is fully remote so, you just need a laptop, internet connection, time available and enthusiasm to take on a challenge.

Why this freelance opportunity might be a great fit for you?

  • Get paid for your expertise, with rates that can go up to $41/hour depending on your skills, experience, and project needs.
  • Take part in a part-time, remote, freelance project that fits around your primary professional or academic commitments.
  • Work on advanced AI projects and gain valuable experience that enhances your portfolio.
  • Influence how future AI models understand and communicate in your field of expertise.
Apply now
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Mindrift
Welcome to Mindrift — a space where innovation meets opportunity. We're a pioneering platform dedicated to advancing the field of artificial intelligence through collaborative online projects. Our focus lies in creating data for generative AI, offering a unique chance for freelancers to contribute to AI development from anywhere, at any time. At Mindrift, we believe in the power of collective intelligence to shape the future of AI. Our platform allows users to dive into a variety of tasks — ranging from creating training prompts for AI models to refining AI responses for greater relevance. Let's build the future of AI together, one task at a time.
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