Senior Android Engineer - Kotlin, FinTech & Security

GFT Technologies Poland; Łódź; On-site; PLN 120,000 - 180,000; Full time

Job summary

GFT Technologies Poland is seeking an Android Developer to design and develop modern Android solutions for one of Poland's leading mobile banking apps. You will work with Kotlin/Java, integrate with backend services, and focus on secure, scalable software used by millions.

This role requires 3+ years of Android experience, strong knowledge of Android SDK, MVVM, and modern architecture. You will be part of a cross-functional agile team, contributing to CI/CD and code quality, with fluent Polish.

Qualifications

• 3+ years of commercial Android development experience with Kotlin.
• Strong knowledge of Android SDK, Android Studio, AndroidX and Material Components.
• Experience with MVVM, Clean Architecture and multi-module apps.
• Proficient in REST/SOAP integrations using Retrofit and OkHttp.
• Experience with RxJava3, Kotlin Coroutines, LiveData, Flow and StateFlow.
• Experience with unit and integration testing (JUnit, Mockito, MockK).
• Familiar with Gradle and DI frameworks (Hilt, Dagger2 or Koin).
• CI/CD experience (Jenkins or GitLab).
• Knowledge of application security and performance optimization.
• 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 development

Android SDK

Android Studio

AndroidX

MVVM

Clean Architecture

LiveData

Flow

StateFlow

RxJava3

Kotlin Coroutines

Retrofit

OkHttp

Firebase

Room

WorkManager

JUnit

Mockito

MockK

PowerMock

Gradle

DI frameworks

Hilt

Dagger2

Koin

Jenkins

GitLab

Security

Polish language

Tools

Retrofit

OkHttp

Firebase

Room

WorkManager

JUnit

Mockito

MockK

PowerMock

Gradle

Hilt

Dagger2

Koin

Jenkins

GitLab

Job description

GFT Technologies Poland is seeking an Android Developer to design and develop modern Android solutions for one of Poland's leading mobile banking apps. You will work with Kotlin/Java, integrate with backend services, and focus on secure, scalable software used by millions.

This role requires 3+ years of Android experience, strong knowledge of Android SDK, MVVM, and modern architecture. You will be part of a cross-functional agile team, contributing to CI/CD and code quality, with fluent Polish.