Android Developer

Crayon Technologies Ltd; Johannesburg; On-site; ZAR 300 000 - 400 000; Full time

Job summary

A tech solutions company is seeking a Senior Android Developer in Johannesburg for a 3-month contract. You'll develop cutting-edge Android applications, focusing on optimizing performance and enhancing user experience using Kotlin and Java. This role fosters innovation and professional growth in a supportive team environment.

Qualifications

• Expertise in Kotlin including coroutines and flows.
• Proficiency in Java for legacy codebases and interop.
• Strong experience with Jetpack Compose for UI development.
• Familiarity with Android Jetpack Components.
• Understanding of MVVM, MVI, and Clean Architecture design patterns.

Responsibilities

• Develop and maintain advanced Android applications using Kotlin and Java.
• Implement modern UI with Jetpack Compose.
• Utilize Android Jetpack Components for app architecture.
• Integrate with back-end services using Retrofit and OkHttp.
• Perform code reviews to ensure best practices.

Skills

Kotlin

Java

Jetpack Compose

Kotlin Coroutines

Retrofit

OkHttp

WebSockets

gRPC

Room

SQLite

Dependency Injection

Job description

Note : This role is for one of our clients.

While we do track apply clicks, you'll need to complete the quick steps on Crayon for your application to be considered.

As a Senior Android Developer, you'll be part of a forward-thinking team responsible for developing high-quality, cutting-edge Android applications.

Your primary focus will be on optimizing performance and enhancing the user experience by utilizing Kotlin, Java, and modern Android development tools.

This is a 3-month contract role where you'll work in a supportive environment fostering innovation and professional growth.

What you’ll do

• Develop and maintain advanced Android applications using Kotlin and Java
• Implement modern UI with Jetpack Compose
• Utilize Android Jetpack Components for efficient app architecture
• Implement MVVM, MVI, and clean architecture design patterns
• Ensure optimal performance through effective concurrency and asynchrony using Kotlin Coroutines
• Integrate with back-end services utilizing Retrofit, OkHttp, WebSockets, and gRPC
• Implement an offline-first approach utilizing Room and SQLite for data management
• Prepare technical documentation and perform code reviews to ensure best practices
• Collaborate closely with cross-functional teams to define, design, and ship new features
• Identify and correct bottlenecks and fix bugs to ensure quality performance

What you’ll need

• Expertise in Kotlin (coroutines, flows, DSLs, sealed classes, inline functions)
• Proficiency in Java for legacy codebases and interop
• Strong experience with Jetpack Compose for UI development
• Familiarity with Android Jetpack Components such as ViewModel, LiveData, Room, Navigation, WorkManager
• Understanding of MVVM, MVI, and Clean Architecture design patterns
• Experience with concurrency and asynchrony, specifically Kotlin Coroutines
• Competency in Dependency Injection using Hilt, Dagger 2, or Koin
• Skilled in Networking with Retrofit, OkHttp, WebSockets, and gRPC
• Experience with offline-first development using Room, SQLite, and caching strategies