Senior Android Developer

Velotio Technologies is a product engineering company working with innovative startups and enterprises We have provided full-stack product development for 110 startups across the globe building products in the cloud-native data engineering B2B SaaS IoT Machine Learning space Our team of 400 elite software engineers solves hard technical problems while transforming customer ideas into successful products We are seeking a Senior Android Developer with expertise in building Android software development kits SDKs to join our team In this role you will lead the end-to-end development of Android SDKs that will be integrated by other developers into their applications The ideal candidate is an expert in Kotlin and Java has a strong grasp of Android architecture and design patterns and has a proven track record of publishing and maintaining Android libraries You will drive the SDK s design implementation documentation and long-term maintenance ensuring high performance reliability and backward compatibility This is a senior-level technical role that requires hands-on development strategic thinking and the ability to collaborate effectively in a hybrid work environment Requirements Design Build Craft modular high-performance Android SDKs in Kotlin and supportive Java that are easy to integrate and extend SDK Lifecycle Ownership Own the full SDK development lifecycle including planning development testing and release Manage versioning semantic versioning and long-term maintenance for continuous improvement of the SDK Release Management Publish artifacts to Maven Central JitPack manage semantic versioning changelogs and ensure backward compatibility Performance Reliability Profile benchmark and optimize for low memory battery and network usage across a wide device matrix Security Compliance Implement encryption token handling and privacy-first data practices - crucial for payment and analytics use cases Documentation Samples Produce clear guides Javadoc KDoc and sample apps so external teams can get started in minutes Collaboration Partner with product backend and QA to define features automate CI CD GitHub Actions Bitrise and drive code reviews What you will bring 5 years of Android development with deep Kotlin expertise and solid Java fundamentals Demonstrated success shipping at least one widely adopted Android SDK or open-source library Hands-on with Gradle plugin configuration dependency management ProGuard R8 and publishing pipelines Strong debugging skills using Android Studio Profiler Logcat and crash-reporting tools e g Firebase Crashlytics Sentry Excellent written communication able to translate complex concepts into concise developer documentation Core Android Development Kotlin 1 9 2 x Java 11 expert-level proficiency Android API 23 - 34 deep platform knowledge multi-APK AAB experience Jetpack Compose 1 6 ViewSystem XML Gradle 8 x KTS modular multi-module projects dependency management Security Cryptography AES-256 RSA-2048 SHA-256 Keystore hardware-backed keys PCI DSS OWASP M-STG best practices secure memory handling SafetyNet Play Integrity certificate pinning TLS 1 3 Network API Development Retrofit 2 OkHttp 5 Kotlinx Serialization Moshi Coroutines Flow exponential backoff connectivity awareness Architecture Patterns MVVM Clean Architecture Repository DI Hilt Dagger Builder Factory Modular Gradle projects feature flags dynamic feature delivery Testing CI CD Unit JUnit 5 Instrumentation Espresso Robolectric MockK Code-coverage enforcement static analysis Detekt Lint Automated pipelines with GitHub Actions Bitrise or Jenkins Payment Domain Knowledge PAN PCI tokenization CVV-less flows 3-D Secure 2 x EMVCo specs gateway APIs recurring billing chargeback flows Bonus Points if you have Prior experience in payment processing tokenization 3-D Secure or analytics event-tracking SDKs Knowledge of CI CD for mobile Fastlane Bitrise or GitHub Actions and automated testing of libraries Contributions to open-source Android projects or active presence in the dev community Benefits Our Culture We have an autonomous and empowered work culture encouraging individuals to take ownership and grow quickly Flat hierarchy with fast decision making and a startup-oriented get things done culture A strong fun positive environment with regular celebrations of our success We pride ourselves in creating an inclusive diverse authentic environment We want to hire smart curious and ambitious folks so please reach out even if you do not have all of the requisite experience We are looking for engineers with the potential to grow At Velotio we embrace diversity Inclusion is a priority for us and we are eager to foster an environment where everyone feels valued We welcome applications regardless of ethnicity or cultural background age gender nationality religion disability or sexual orientation