Freelance Senior Software Developer (Kotlin) - AI Trainer at Mindrift

, , Ireland -

Full Time

Start Date

Immediate

Expiry Date

29 Apr, 26

Salary

50.0

Posted On

29 Jan, 26

Experience

5 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

Kotlin, Android Development, JUnit 5, Kotest, MockK, Espresso, Robolectric, CI/CD, Automated Testing, Performance Testing, UI Testing, Data-Driven Insights, Coroutines, Extension Functions, Sealed Classes, Software Engineering, Computer Science

Industry

technology;Information and Internet

Description

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 and maintain automated tests to ensure the quality, performance, and reliability of Kotlin and Android applications. Collaborate with developers to identify, reproduce, and resolve functional, performance, and UI issues across multiple environments. Define and improve quality standards across build pipelines, ensuring smooth CI/CD integrations and release stability. Monitor app behavior in production and use data‑driven insights to guide testing priorities and improvements. Apply professional judgment to assess AI responses. What we look for This opportunity is a good fit for Senior Kotlin software developers open to part-time, non-permanent projects. Ideally, contributors will have: Degree in Computer Science, Software Engineering or related fields. 5+ years of Kotlin including coroutines, extension functions, and sealed classes. 3+ years of Android/JVM development experience. Familiarity with JUnit 5, Kotest, MockK, and Android testing (Espresso, Robolectric). 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 $50/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.

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Responsibilities

Contributors will design and maintain automated tests for Kotlin and Android applications, collaborating with developers to resolve issues. They will also define quality standards and monitor app behavior using data-driven insights.