Senior Android Developer with Kotlin, Security SDK Platform

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

What We Offer:

• Vacation days: Up to 26 business days per year.

• 10 illness/special days off per year (fully paid, no medical papers needed) for all contract types

• Health and life insurance (Luxmed)

• MyBenefit platform with Multisport option

• Internal psychological support service

• English language classes from the first working day

• Access to external learning platforms: O’Reilly, LinkedIn Learning, Udemy, and a wide catalog of diverse internal training

• Flexible workplace: work from the office, from home, or choose a hybrid option

• Tech Skills Mentoring Program

• Opportunities to develop as a public speaker, mentor, or technical interviewer

• Fully paid idle (bench) when not involved in a project

• Certification reimbursement (AWS, GCP, Microsoft, etc.)