Senior Mobile Developer

TechDigital Group; Portland (ME); On-site; USD 110,000 - 140,000; Full time

Job summary

TechDigital Group is seeking an experienced Android Developer with strong Kotlin expertise to design, develop, test, and maintain high-quality Android applications. You will work closely with product managers, UI/UX designers, backend engineers, and QA teams to deliver reliable and user-friendly mobile solutions.

Responsibilities include implementing modern Android architecture, Jetpack components, and CI/CD pipelines, while ensuring performance, security, and scalability across releases.

Qualifications

• Kotlin proficiency and Android architecture knowledge.
• Experience with Jetpack Compose and MVVM/clean architecture.
• Strong REST API integration and offline caching strategies.
• Ability to write unit tests and perform profiling.
• Familiarity with Android security, performance, and QA collaboration.

Responsibilities

• Design, develop, and maintain native Android apps using Kotlin.
• Build scalable apps with Android SDK and modern architecture.
• Create responsive UI with Material Design and Jetpack Compose.
• Integrate REST APIs and backend services, handle auth and notifications.
• Implement MVVM / Clean Architecture and testable code.
• Write unit/UI tests and participate in code reviews.
• Collaborate in Agile/Scrum with cross-functional teams.
• Ensure security, performance, scalability, and usability.

Skills

Kotlin

Jetpack Compose

MVVM / Clean Architecture

REST API Integration

Offline and Caching Strategies

Unit Testing

Debugging and Performance Profiling

Job description

We are looking for an experienced Android Developer with strong Kotlin expertise to design, develop, test, and maintain high-quality Android applications. The ideal candidate will have hands-on experience building scalable, secure, and high-performance mobile applications using modern Android development practices. The candidate will work closely with product managers, UI/UX designers, backend engineers, and QA teams to deliver reliable and user-friendly mobile solutions.

Key Responsibilities

• Design, develop, and maintain native Android applications using Kotlin.
• Build scalable and maintainable applications using Android SDK and modern Android architecture.
• Develop responsive and user-friendly mobile interfaces following Material Design principles.
• Work with Jetpack components, including ViewModel, LiveData, Room, Navigation, and WorkManager.
• Implement modern UI using Jetpack Compose.
• Integrate RESTful APIs and backend services into Android applications.
• Work with JSON, authentication, push notifications, and third-party SDK/API integrations.
• Implement MVVM / Clean Architecture and appropriate design patterns.
• Write clean, reusable, testable, and well-documented code.
• Develop unit tests and UI tests and work closely with QA to resolve defects.
• Troubleshoot performance issues, crashes, memory leaks, and other production issues.
• Participate in code reviews and contribute to technical design and architecture discussions.
• Collaborate with cross-functional teams in an Agile/Scrum environment.
• Ensure applications meet security, performance, scalability, and usability requirements.
• Support application releases through Google Play Store and CI/CD pipelines.

Must-have Skills

• Kotlin
• Jetpack Compose
• MVVM / Clean Architecture
• REST API Integration
• Offline and Caching Strategies
• Unit Testing
• Debugging and Performance Profiling

Years of experience required: 8+