Senior Android Developer (f/m/d)

The role

You will own the core development and optimization of the adjoe Ads SDK. You will design APIs, optimize for minimal resource footprint, and maintain CI/CD pipelines.

What you will do

• Own core development and optimization of the adjoe Ads SDK
• Collaborate with backend teams to design APIs
• Design for minimal footprint, optimizing battery impact and memory usage
• Monitor, debug, and maintain SDK reliability at scale
• Leverage observability and data tools to track errors and investigate behavior
• Maintain and improve CI/CD pipelines

Required qualifications

• 8+ years of Android experience or 3+ years specifically in SDK/library development
• Primary work with Kotlin
• Deep understanding of Android lifecycles, ProGuard/R8, and multithreading
• Strong track record in API design
• Experience maintaining strict backward compatibility for external integrators
• Experience with high-performance networking protocols like gRPC, Protobuf, Wire, and OkHTTP
• Experience with Sentry, Kibana, and AWS (S3, QuickSight, Athena)
• Hands-on experience with Gradle and GitLab CI

Nice to have

• Experience in ad-tech or programmatic advertising (aligning products with IAB specifications)
• Experience with NDK/JNI (C/C++ interop on Android)
• Parallel iOS development experience

About the company

adjoe builds the technologies behind mobile apps growth and monetization. adjoe Ads is a programmatic in-app advertising platform that connects advertisers and publishers through direct integration of Android and iOS SDKs.