Senior Android Engineer — Kotlin, CI/CD, Banking App

GFT Technologies SE; Warszawa; On-site; PLN 234,000 - 289,000; Full time

Job summary

GFT Technologies SE in Warsaw seeks an experienced Android Developer to design and build modern mobile solutions. You will integrate apps with backend services, contribute to secure, scalable software used by millions of users, and work in an agile, cross-functional team.

The role requires 3+ years of Android development with Kotlin, strong knowledge of Android SDK, MVVM, Clean Architecture, and proficiency with Retrofit/OkHttp, Firebase, Room and CI/CD tooling.

Qualifications

• 3+ years of commercial Android development experience with Kotlin.
• Strong Android SDK, Android Studio and AndroidX knowledge.
• Experience with MVVM, Clean Architecture and multi-module apps.
• Proficient in RxJava3 and Kotlin Coroutines, LiveData and Flow/StateFlow.
• REST/SOAP integrations using Retrofit/OkHttp; Firebase, Room and WorkManager familiarity.
• Experience with testing (JUnit, Mockito, MockK or PowerMock) and Gradle-based projects.
• Knowledge of DI frameworks (Hilt, Dagger2, Koin) and CI/CD (Jenkins, GitLab CI).
• Fluent Polish is required.

Responsibilities

• Develop and maintain Android applications using Kotlin and Java.
• Design and implement new mobile features and secure, scalable solutions.
• Integrate apps with backend services and ensure high quality and performance.
• Write unit and integration tests; participate in CI/CD and releases.
• Collaborate with cross-functional teams in an agile environment.

Skills

Android/Kotlin

Android SDK

Android Studio

MVVM

Clean Architecture

Multi-module apps

RxJava3

Kotlin Coroutines

LiveData

Flow/StateFlow

Retrofit

OkHttp

Firebase

Room

WorkManager

Android Architecture Components

JUnit

Mockito

MockK

PowerMock

Gradle

Hilt

Dagger2

Koin

Jenkins

GitLab CI

Security

Polish

Tools

Retrofit

OkHttp

Firebase

Room

WorkManager

Android Architecture Components

Gradle

Jenkins

GitLab CI

Job description

GFT Technologies SE in Warsaw seeks an experienced Android Developer to design and build modern mobile solutions. You will integrate apps with backend services, contribute to secure, scalable software used by millions of users, and work in an agile, cross-functional team.

The role requires 3+ years of Android development with Kotlin, strong knowledge of Android SDK, MVVM, Clean Architecture, and proficiency with Retrofit/OkHttp, Firebase, Room and CI/CD tooling.