Senior Android Developer | Kotlin SDK

You'll build a reusable native Android SDK in Kotlin for an established Australian business developing nutrition and meal-planning technology. Third-party Android apps will embed what you build, so the work is as much about clean interfaces, packaging and documentation as it is about code.

It's a short, focused contract with a clear finish line: design the SDK, package and version it, prove it inside an existing production Android app, and support it through to release.

Quick facts

• Pay: PHP 140,000 - PHP 160,000 per month
  
• Location: 100% work from home
  
• Hours: Monday to Friday, 7:00 AM - 4:00 PM PHT
  
• Engagement: Contract, 3-4 months, starting immediately
  

What you'll be doing

• Design and build a modular, reusable Android SDK in Kotlin that host apps can embed
  
• Define the SDK interfaces and reusable native UI components host apps integrate against
  
• Integrate REST APIs behind nutrition, meal-planning and AI-powered features, handling networking, error states and performance
  
• Build secure authentication: token management, session handling, secure storage and user sync
  
• Package, version and distribute the SDK with Gradle and AAR
  
• Integrate and validate the SDK inside an existing production Android app
  
• Write the integration documentation and support testing through to production release
  

What you'll need

• At least 5 years of native Android development with Kotlin
  
• Experience building Android SDKs or libraries, not only apps
  
• Gradle, AAR packaging and SDK distribution
  
• REST API integration, including authentication flows
  
• Token-based authentication, session management and secure storage on Android
  
• Jetpack Compose and/or Android Views
  
• Android architecture, modularisation and dependency management
  
• Kotlin Coroutines, Flow and modern asynchronous patterns
  
• Strong debugging, performance and testing habits
  
• Experience working in an existing production Android codebase
  
• Comfortable owning your work independently, and available to start immediately
  

Nice to have

• Experience building an SDK for third-party commercial integrations
  
• OAuth 2.0, JWT or secure token exchange
  
• CameraX or image processing
  
• AI or chat functionality in a mobile app
  
• CI/CD and automated SDK publishing
  
• Node.js and Express backend experience
  
• Health or fitness consumer mobile experience, or a startup background
  

• PHP 140,000 - PHP 160,000 per month
  
• 100% work from home
  
• Monday to Friday, 7:00 AM - 4:00 PM PHT
  
• Annual rate and performance review
  
• Comprehensive training and ongoing professional development
  
• Regular staff events and team activities
  
• Direct exposure to Australian clients and business practices
  

If you've built and shipped a native Android SDK in Kotlin, packaged it as an AAR and can start now, we'd like to hear from you.