Android / Mobile Engineer (Mid-level)

Type: Contract, per-project.
Location: Remote - alignment with North America is preferred (ideally Pacific Time, acceptable PT-ET).
Availability: Contractor (40 hours per week)

We’re looking for a highly capable Software Engineer to join our Powered team and help build the core libraries behind our product as well as the SDKs used by device manufacturers and third-party application developers worldwide.

You’ll work on low-level networking features, platform-specific implementations and cross-platform SDKs that directly impact how millions of users measure and understand their Internet performance.

What you’ll do

• Design and build reusable components and library features used within our Android and mobile products.

• Develop network testing and connectivity-related functionality using Java, Kotlin and, when needed, Kotlin Multiplatform.

• Contribute to performance-sensitive components and collaborate with senior engineers on native or low-level implementations when required.

• Maintain and support existing Android components and legacy modules built in Java.

• Design clean, well-structured and easy-to-use APIs for application and internal library usage.

• Work closely with Android platforms, device capabilities and system-level features.

• Help ensure reliability, flexibility, portability and code reuse across mobile components.

• Implement basic analytics and telemetry to monitor performance and behavior in production.

• Write unit and integration tests to ensure quality and stability.

• Debug and troubleshoot multi-layer and multi-platform issues with guidance from senior engineers when needed.

• Collaborate with backend team on technical solutions and implementations.

• Contribute to documentation and ongoing maintenance of mobile libraries and components.

• Participate in code reviews and continuous improvement of engineering practices.

What we’re looking for

• 3+ years of professional software development experience.

• 2+ years of professional Android development experience.

• Good proficiency in Kotlin and Java.

• Solid knowledge of data structures, algorithms and common design patterns.

• Experience building reusable components or libraries within Android projects.

• Good understanding of the Android Framework and Android SDK.

• Experience working with threading, concurrency and performance optimization on Android.

• Experience using networking libraries such as OkHttp and working with HTTP-based APIs.

• Good understanding of networking fundamentals, mainly HTTP/HTTPS and basic TCP concepts.

• Experience or strong interest in working with Kotlin Multiplatform or cross-platform libraries.

• Experience writing unit and integration tests.

• Good debugging and troubleshooting skills.

• Experience working with Git-based workflows (branches, pull requests and code reviews).

• Basic experience working with CI/CD pipelines.

• Ability to learn new projects and codebases effectively.

• Good communication and collaboration skills in distributed teams.

• Strong sense of ownership and good time-management skills.

Nice to have

• Basic experience with C++.

• Experience with Swift.

• Contributions to open-source projects.