Senior Android Engineer, FinTech Platform (Kotlin) – Hybrid

Traffit; Kraków; Híbrido; PLN 220.000 - 300.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Private medical care

Sports card

Training courses

Hybrid work model

Descripción de la vacante

People More seeks a Senior Android Engineer for a FinTech platform. You will design and build production-grade Android apps using Kotlin, Jetpack Compose, and the Android View system, with strong emphasis on performance, security, and modular architecture.

You will collaborate with engineering and product managers to shape API contracts, testing, and deployment strategies. The role requires 5+ years in native Android, deep Kotlin expertise, and experience with MVVM/Clean/MVI.

Formación

• At least 5 years of professional experience in native Android development, including applications released through Google Play.
• Minimum 4 years of hands-on experience with Kotlin and Jetpack Compose and/or the Android View system.
• At least 3 years of experience in Android testing using JUnit, Espresso, and Compose Testing.
• Strong proficiency in Kotlin, including Coroutines, Flow, sealed classes, and extension functions.
• Practical production experience with Jetpack Compose and the Android View system.
• Solid understanding of architectural approaches such as Clean Architecture, MVVM, and/or MVI, including modular application design and separation of concerns.
• Hands-on experience with Hilt or Dagger 2, including dependency injection, component lifecycles, and scope management.
• Experience working with Room, EncryptedSharedPreferences, and Android Keystore.
• Knowledge of Retrofit and OkHttp, including certificate pinning and structured error-handling mechanisms.
• Experience analyzing and improving Android application performance using Android Profiler and Perfetto.
• Familiarity with Gradle-based CI/CD pipelines, including automated application signing and delivery.
• Ability to understand and work with Java code, particularly in legacy applications and third-party SDK integrations.
• Experience implementing feature flags and structured event tracking within mobile applications.
• Very good English and Polish

Responsabilidades

• Design, develop, and maintain the architecture of a production-grade Android application, ensuring well-defined layers, modular components, and an efficient Gradle build structure.
• Build and enhance native Android applications using Kotlin, Jetpack Compose, and the Android View system
• Implement asynchronous operations and effective state management with Kotlin Coroutines and Flow.
• Develop data persistence and security mechanisms using Room, EncryptedSharedPreferences, and Android Keystore.
• Participate in the entire software development lifecycle, including PRD preparation, technical specifications, testing, feature-flag-based deployments, and structured event tracking.
• Create and maintain automated unit and UI tests using JUnit, Espresso, and Compose Testing.
• Monitor, analyze, and optimize application performance using Android Profiler and Perfetto.
• Ensure high production stability by identifying and resolving crashes and ANRs with tools such as Crashlytics, while minimizing regression risks.
• Develop and improve CI/CD processes using Gradle, GitHub Actions, or comparable automation solutions.
• Implement and maintain integrations between native Android functionality and web-based experiences, including WebView, Custom Tabs, App Links, and Deep Linking.
• Work closely with Engineering and Product Managers to define requirements, manage the team backlog, and propose effective Android-specific solutions.
• Collaborate with backend development teams on API contracts, authentication mechanisms, and event schemas.
• Support production incident resolution and contribute to root cause analysis and post-incident reviews when necessary

Conocimientos

Kotlin

Jetpack Compose

Android View system

Coroutines & Flow

Architectures (MVVM/Clean/MVI)

Hilt or Dagger 2

Room/EncryptedSharedPreferences/Keyst

Retrofit/OkHttp

Android Profiler/Perfetto

Gradle CI/CD

Herramientas

Gradle

GitHub Actions

WebView/Deep Linking

Descripción del empleo

People More seeks a Senior Android Engineer for a FinTech platform. You will design and build production-grade Android apps using Kotlin, Jetpack Compose, and the Android View system, with strong emphasis on performance, security, and modular architecture.

You will collaborate with engineering and product managers to shape API contracts, testing, and deployment strategies. The role requires 5+ years in native Android, deep Kotlin expertise, and experience with MVVM/Clean/MVI.