Freelance Software Developer (Kotlin) - AI Trainer

February 2, 2026
Open
Open
USD $40 / hour
Location
Vietnam
Occupation
Part-time
Experience level
Mid-level
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Job Summary

Join Mindrift as a remote, project-based Kotlin expert, contributing to AI initiatives for top tech companies. You’ll design high-quality technical content, review AI outputs, collaborate with engineers, and create practical Kotlin samples. Assignments are flexible and part-time, requiring 6–10 hours per project, with rates up to $40/hour. Payment terms and rates may vary by project, and additional incentives may be available.

Ideal candidates have a Computer Science degree, at least 3 years of Kotlin/Java experience, proficiency with RESTful APIs, microservices, Docker, and Kubernetes, and a minimum B2 level of English. A stable internet connection is required. Submit your CV in English and indicate your English proficiency to apply.

This is a non-permanent, flexible opportunity ideal for skilled developers seeking impactful, remote project work. Workflows are task-based, and contributors choose their own schedules within deadlines.

Highlight
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Please submit your CV in English and indicate your level of English proficiency.

Mindrift connects specialists with project-based AI opportunities for leading tech companies, focused on testing, evaluating, and improving AI systems. Participation is project-based, not permanent employment.

What this opportunity involves

While each project involves unique tasks, contributors may:

  • Design high‑quality technical content, examples, and explanations that demonstrate best practices in Kotlin development.
  • Collaborate with engineers to ensure accuracy and consistency across code samples, tutorials, and developer guides.
  • Explore modern Kotlin frameworks and tools to create practical, real‑world examples for learning and testing.
  • Continuously refine content based on feedback, emerging patterns, and advances in the Kotlin ecosystem.
  • Apply professional judgment to assess AI responses.

What we look for

This opportunity is a good fit for Kotlin software developers open to part-time, non-permanent projects. Ideally, contributors will have: 

  • Degree in Computer Science, Software Engineering or related fields
  • 3+ years of Kotlin/Java development experience
  • Experience building RESTful APIs, microservices, or distributed system interfaces.
  • Familiarity with Docker, Kubernetes, and cloud deployment strategies.
  • English proficiency - B2
  • Stable internet connection 

How it works

Apply → Pass qualification(s) → Join a project → Complete tasks → Get paid

Project time expectations

Tasks for this project are estimated to take 6-10 hours to complete, depending on complexity. This is an estimate and not a schedule requirement; you choose when and how to work. Tasks must be submitted by the deadline and meet the listed acceptance criteria to be accepted.

Payment

  • Paid contributions, with rates up to $40/hour*
  • Fixed project rate or individual rates, depending on the project
  • Some projects include incentive payments

*Note: Rates vary based on expertise, skills assessment, location, project needs, and other factors. Higher rates may be offered to highly specialized experts. Lower rates may apply during onboarding or non-core project phases. Payment details are shared per project.

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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1,001-5,000
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Information Technology & Services
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