AI Summary
Join our Powered team as a Software Engineer to build core libraries and SDKs for Speedtest clients and third-party partners. Design and develop low-level networking features, platform-specific implementations, and cross-platform SDKs. Collaborate with distributed teams and contribute to documentation and code reviews.
Key Highlights
Design and build core SDK and library features
Develop network testing functionality using Kotlin and Kotlin Multiplatform
Maintain and support legacy SDK products
Key Responsibilities
Design and build core SDK and library features
Develop network testing functionality using Kotlin and Kotlin Multiplatform
Maintain and support legacy SDK products
Collaborate on architecture and technical decisions
Contribute to documentation, developer support, and long-term maintenance
Technical Skills Required
Job Description
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 every Speedtest client, 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 core SDK and library features used by Speedtest clients and third-party partners
- Develop network testing functionality using Kotlin and Kotlin Multiplatform
- Build and maintain performance-critical components using C++
- Maintain and support legacy SDK products built in Java
- Design clean, well-structured and easy-to-use APIs for both SDK and application use
- Work close to Android platforms, device hardware and, in some cases, embedded environments
- Ensure high levels of reliability, flexibility, portability and code reuse
- Implement analytics and telemetry to monitor performance and behavior in production
- Write unit, integration, load and stress tests
- Debug and troubleshoot complex, multi-layer and multi-platform issues
- Collaborate on architecture and technical decisions across SDK, frontend, backend and distributed server teams
- Contribute to documentation, developer support and long-term maintenance of SDKs
- Participate in code reviews and continuous improvement of engineering practices
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- 5+ years of professional software development experience
- 3+ years of professional Android development experience
- Strong proficiency in Kotlin and Java
- Solid knowledge of data structures, algorithms and design patterns
- Hands-on experience building and maintaining SDKs or reusable libraries
- Strong understanding of Android Framework and Android SDK development
- Experience with threading, concurrency and performance optimization on Android
- Experience with networking frameworks such as OkHttp and TCP sockets
- Strong understanding of networking fundamentals (IP, TCP/UDP, HTTP/S, WebSockets)
- Experience designing cross-platform libraries (Kotlin Multiplatform or similar)
- Experience writing unit, integration, load and stress tests
- Strong debugging and troubleshooting skills
- Experience working with Git-based workflows (branches, pull requests, code reviews)
- Experience with CI/CD pipelines
- Ability to ramp up quickly on new projects and complex codebases
- Strong communication and collaboration skills in distributed teams
- High level of ownership, autonomy and time-management skills
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- Experience with C++
- Experience with Swift
- Experience contributing to open-source projects
- Previous experience working with embedded or hardware-adjacent environments
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