Senior Android Engineer: Kotlin, MVVM & Secure Banking Apps

Us3 Consulting; Poland; On-site; PLN 90,000 - 150,000; Full time

Job summary

Us3 Consulting is seeking an experienced Android developer to design and build modern Android apps used by millions of users in Poland. You will work with Kotlin/Java, integrate with backend services, and participate in CI/CD and releases.

Requirements include 3+ years in Android development, strong knowledge of AndroidX, MVVM, and testing with JUnit/Mockito. Fluency in Polish is expected. Hybrid collaboration with cross-functional teams in an agile environment.

Qualifications

• At least 3 years of commercial experience in Android development with Kotlin.
• Strong knowledge of Android SDK, Android Studio, AndroidX and Material Components.
• Experience with MVVM, Clean Architecture and multi-module applications.
• Proficient with RxJava3 and Kotlin Coroutines.
• Experience with REST/SOAP integrations using Retrofit and OkHttp.
• Knowledge of Firebase, Room, WorkManager and Android Architecture Components.
• Experience with unit and integration testing using JUnit, Mockito, and similar frameworks.
• Knowledge of Gradle, dependency management and DI frameworks such as Hilt or Dagger2 or Koin.
• Experience with CI/CD tools like Jenkins or GitLab.
• Fluent Polish

Responsibilities

• Develop and maintain Android applications using Kotlin and Java.
• Design and implement new mobile features.
• Integrate applications with backend services.
• Write unit and integration tests.
• Ensure high code quality, security and performance.
• Participate in CI/CD processes and application releases.
• Collaborate with cross-functional teams in an agile environment.

Skills

Kotlin

Java

Android SDK

Android Studio

MVVM

Clean Architecture

RxJava3

Kotlin Coroutines

LiveData

Flow

StateFlow

Retrofit

OkHttp

JUnit

Mockito

CI/CD

Gradle

Dagger/Hilt

Koin

Firebase

Room

WorkManager

Tools

Gradle

Dagger/Hilt

Koin

Firebase

Room

WorkManager

Retrofit

OkHttp

JUnit

Mockito

Job description

Us3 Consulting is seeking an experienced Android developer to design and build modern Android apps used by millions of users in Poland. You will work with Kotlin/Java, integrate with backend services, and participate in CI/CD and releases.

Requirements include 3+ years in Android development, strong knowledge of AndroidX, MVVM, and testing with JUnit/Mockito. Fluency in Polish is expected. Hybrid collaboration with cross-functional teams in an agile environment.