Senior Android Engineer — Kotlin & Jetpack Expert

Quantum Technologies. LLC; Seattle (WA); On-site; USD 110,000 - 165,000; Full time

Job summary

Quantum Technologies. LLC seeks an experienced Android Developer to design, develop, test, and maintain high-quality native Android apps using Kotlin and Java.

You will build scalable mobile experiences, integrate backend services, and ensure performance across devices. You will work with Jetpack Compose, MVVM, and modern Android architectures, participate in code reviews, and collaborate with product, backend, and QA teams.

Qualifications

• 5+ years of Android app development experience.
• Strong Kotlin/Java expertise and Android SDK proficiency.
• Experience with Jetpack Compose, MVVM, and modern architecture.
• Proficient in REST APIs, authentication, and secure data handling.
• Experience publishing apps to Google Play and CI/CD workflows.

Responsibilities

• Design, develop, test, and maintain native Android applications.
• Collaborate with product managers, UI/UX designers, and backend teams.
• Integrate backend services and third-party SDKs.
• Focus on performance, memory usage, and startup time.
• Write unit and UI tests and participate in code reviews.

Skills

Kotlin

Java

Android development

Jetpack Compose

MVVM

Clean Architecture

REST API integration

OAuth 2.0

Android performance optimization

Unit testing

Education

Bachelor's degree in Computer Science, Information Technology, Software Engineering, or a related field

Master's degree in Computer Science or Mobile Application Development is preferred

Certifications in Android development / Google Android technologies is an advantage

Tools

Android Studio

Git

GitHub

Jenkins

CI/CD pipelines

Room/DataStore

Firebase

Google Play Console

Job description

Quantum Technologies. LLC seeks an experienced Android Developer to design, develop, test, and maintain high-quality native Android apps using Kotlin and Java.

You will build scalable mobile experiences, integrate backend services, and ensure performance across devices. You will work with Jetpack Compose, MVVM, and modern Android architectures, participate in code reviews, and collaborate with product, backend, and QA teams.