SDET for Android (Kotlin) Warsaw

Zoolatech; Warszawa; On-site; PLN 150,000 - 210,000; Full time

Job summary

Zoolatech in Warszawa is seeking an experienced SDET to join the Android Engineering and QA Automation team. You will design, implement, and maintain automated test cases and frameworks in Kotlin, JUnit, and Espresso, ensuring robust mobile app quality.

Collaborate with Android engineers, own the quality lifecycle with TestRail, build in-house test tools, contribute to CI/CD improvements, and explore AI-driven testing to accelerate workflows. Strong English communication is essential.

Qualifications

• 4+ years of experience as an SDET, QA Automation Engineer, or related role, with a strong focus on Android application testing.
• Proficient in Kotlin and the Android SDK, with strong debugging and troubleshooting skills.
• Hands-on experience with JUnit, Espresso and UI automation.
• Experience with dependency injection frameworks (Dagger/Hilt) and API testing using Retrofit.
• Familiarity with Jetpack libraries and modern Android development best practices.
• Strong experience with Git/GitHub, familiar with both Gitflow and trunk-based development.
• Knowledge of SOLID principles and ability to apply them in test framework design.
• Ability to apply or readiness to adopt AI-driven testing practices, including test generation and workflow automation.
• Strong English communication skills.

Responsibilities

• Contribute as a key member of a world-class Android Engineering and QA Automation team.
• Design, implement, and maintain automated test cases and frameworks in Kotlin, JUnit, Espresso.
• Own the quality lifecycle: identify issues, file and track bugs in TestRail (or similar systems), and drive them to resolution.
• Collaborate closely with Android engineers to ensure application code is testable and automation-friendly.
• Build and maintain in-house tools for test parallelization, network mocking, and custom reporting.
• Perform peer code reviews, ensuring robust test coverage and reliable CI pipelines.
• Drive improvements to the CI/CD ecosystem, ensuring scalability, maintainability, and speed of test execution.
• Explore and integrate AI-assisted development approaches to enhance test generation, workflow optimization, and CI/CD practices.
• Actively participate in Agile ceremonies – daily standups, sprint planning, retrospectives, and showcases.

Skills

Android testing

QA Automation

CI/CD

English communication

AI-driven testing

Tools

TestRail

Kotlin

JUnit

Espresso

Dagger/Hilt

Retrofit

Jetpack libraries

Git/GitHub

Job description

A large-scale consumer mobile application with millions of active users required a robust testing strategy to ensure stability, performance, and seamless user experience. Testing efforts focused on both iOS and Android platforms, covering functional validation, UI/UX consistency, geolocation features, and real-time interactions.

Responsibilities

• Contribute as a key member of a world-class Android Engineering and QA Automation team.
• Design, implement, and maintain automated test cases and frameworks in Kotlin, JUnit, Espresso.
• Own the quality lifecycle: identify issues, file and track bugs in TestRail (or similar systems), and drive them to resolution.
• Collaborate closely with Android engineers to ensure application code is testable and automation-friendly.
• Build and maintain in-house tools for test parallelization, network mocking, and custom reporting.
• Perform peer code reviews, ensuring robust test coverage and reliable CI pipelines.
• Drive improvements to the CI/CD ecosystem, ensuring scalability, maintainability, and speed of test execution.
• Explore and integrate AI-assisted development approaches to enhance test generation, workflow optimization, and CI/CD practices.
• Actively participate in Agile ceremonies – daily standups, sprint planning, retrospectives, and showcases.

Skills Required

• 4+ years of experience as an SDET, QA Automation Engineer, or related role, with a strong focus on Android application testing.
• Proficient in Kotlin and the Android SDK, with strong debugging and troubleshooting skills.
• Hands-on experience with JUnit, Espresso and UI automation.
• Experience with dependency injection frameworks (Dagger/Hilt) and API testing using Retrofit.
• Familiarity with Jetpack libraries and modern Android development best practices.
• Strong experience with Git/GitHub, familiar with both Gitflow and trunk-based development.
• Knowledge of SOLID principles and ability to apply them in test framework design.
• Ability to apply or readiness to adopt AI-driven testing practices, including test generation and workflow automation.
• Strong English communication skills