Freelance Senior Software Developer (Kotlin) - AI Trainer

Mindrift•San Antonio, TX

1d•$80

About The Position

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.

Requirements

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

Responsibilities

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.