Senior Android Developer with Kotlin, Security SDK Platform

Remote.Bulgaria
Remote.Georgia
Remote.Kazakhstan
Remote.Poland
Алмати
Астана
Белград
Варна
Варшава
Вроцлав
Ереван
Клуж-Напока
Краков
Ларнака
Лодз
Люблин
Рига
София
Тбилиси

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Project overview

The project focuses on modernizing a mobile SDK used for digital fraud prevention and customer authentication within financial services. You will contribute to building a secure, scalable, and performance driven SDK designed for integration into a wide range of external Android applications.

Team

You will work in a distributed cross functional team including Android engineers, backend developers, and security specialists. The team collaborates across regions, following shared engineering practices and contributing to design decisions and system improvements.

Position overview

We are looking for a Senior Android Developer who will lead the technical design and implementation of an Android SDK modernization initiative. You will define architecture, validate migration strategies, develop proof of concept components, and establish engineering standards for distribution, testing, and security.

Technology stack

Kotlin, Java, Coroutines, Flow, Gradle, Maven, AAR, ProGuard, R8, WorkManager, Android Keystore, EncryptedSharedPreferences, Play Integrity API, SafetyNet, JUnit, Robolectric, Espresso, AndroidX

Responsibilities

Lead the design and development of Android SDK components
Define and maintain scalable and maintainable SDK architecture
Develop proof of concept solutions to validate architectural decisions
Ensure SDK compatibility across different Android versions and device manufacturers
Establish best practices for SDK distribution, integration, and versioning
Collaborate with cross functional teams on security and compliance requirements
Optimize performance including startup time, memory usage, and binary size
Implement secure data storage and communication mechanisms
Drive testing strategy including unit, integration, and instrumentation testing
Participate in code reviews and contribute to engineering standards

Requirements

8+ years of experience in Android development
Strong proficiency in Kotlin and experience with Java interoperability
Experience building, distributing, and maintaining reusable Android SDKs or libraries
Experience with AAR packaging and artifact publishing using Maven repositories
Strong knowledge of Gradle including build configuration and customization
Understanding of ProGuard and R8 configuration and code optimization
Experience managing dependencies and ensuring compatibility with host applications
Knowledge of Android lifecycle management and background execution using WorkManager
Understanding of performance optimization and avoiding ANR and UI performance issues
Experience with Android security features including Android Keystore and encryption mechanisms
Familiarity with Play Integrity API or SafetyNet and certificate pinning
Experience with performance monitoring and profiling tools
Experience with testing frameworks including JUnit, Robolectric, and Espresso

Nice to have

Experience working in financial services or regulated environments
Exposure to sensor based data processing using Android SensorManager
Knowledge of API desugaring and backward compatibility strategies
Understanding of SDK footprint optimization techniques
Experience contributing to architecture guidelines or internal engineering standards

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For Pros

Project overview

Team

Position overview

Technology stack

Responsibilities

Requirements

Nice to have

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