Senior Android Developer (AdTech SDKs)

Company Description
Join a project where your work directly impacts large-scale mobile monetization platforms used by publishers worldwide. We are looking for a Senior Android Developer with strong expertise in native Android SDK development and production-grade mobile engineering. In this remote role, you will collaborate with distributed engineering teams to maintain and enhance scalable Android SDKs integrated into real mobile applications at scale.

This opportunity is ideal for engineers who enjoy solving architectural, release management, and compatibility challenges beyond standard mobile application development. We at Sigma Software offer the opportunity to work with modern technologies, contribute to open-source SDK solutions, and collaborate with experienced professionals in the growing AdTech domain.

You will join a technically strong environment focused on reliability, scalability, and engineering excellence. CUSTOMER Our Customer operates in the mobile advertising technology industry and develops SDK solutions that help mobile publishers monetize their applications through in-app advertising infrastructure.

Their products support ad delivery, rendering, analytics, and communication with advertising platforms while serving performance-sensitive production environments used worldwide. PROJECT The project focuses on the development and maintenance of native Android advertising SDKs distributed through Maven repositories and integrated into third-party mobile applications.

The SDKs support banner and video advertising, SSP communication, beacon and pixel tracking, timeout handling, and publisher-side integration workflows. The team operates in a release-critical environment where SDK stability, backward compatibility, and production reliability are essential. Engineers contribute to scalable open-source SDK solutions already actively used in production by external publishers.

Job Description
• Develop, enhance, and maintain native Android SDKs used in production environments • Implement new SDK features and improve existing functionality • Ensure SDK stability, backward compatibility, and release quality • Design and support SDK architecture, packaging, versioning, and release processes • Maintain Maven and Gradle distribution pipelines • Create and maintain automated and device-based testing solutions • Investigate and resolve SDK defects, integration issues, and publisher-reported problems • Collaborate with cross-functional teams to improve SDK reliability and performance • Participate in release planning, validation, and quality assurance activities • Support external publishers during SDK integration and troubleshooting

Qualifications

• 4+ years of commercial Android development experience • Strong commercial experience with Kotlin and Java • Proven experience developing native Android SDKs or libraries • Strong understanding of Android SDK architecture and lifecycle • Hands-on experience with SDK packaging and distribution tools such as Maven Central, JitPack, and Gradle plugins • Experience with versioning, release management, and dependency handling • Practical experience with automated testing and device-based testing • Strong focus on software quality and production reliability • Experience working in release-critical environments • Ability to troubleshoot complex integration and compatibility issues • Good communication skills and ability to work in a distributed team environment • Upper-Intermediate English level or higher WILL BE A PLUS • Experience with AI-assisted testing approaches and test coverage optimization • Understanding of mobile advertising technologies and AdTech ecosystems • Experience with SSP platforms and ad servers • Knowledge of banner and video advertising mechanics • Familiarity with tracking beacons and pixel-based analytics • Experience contributing to or maintaining open-source SDKs • Experience supporting third-party publisher integrations