Based is building the next generation of social applications, and we need a Senior Flutter Engineer to take the lead on building our unified cross-platform mobile experience for both iOS and Android. You'll be the sole owner of the mobile frontend's technical execution, working closely with our existing engineering and design team to create a beautiful, performant, and intuitive user experience built on the Flutter framework. This is a unique opportunity to have a significant impact and shape the future of our product from the ground up.

Responsibilities

• Architect, develop, and deploy a cross-platform mobile application for both iOS and Android using Flutter and Dart from scratch.

• Architect and implement scalable and maintainable app architectures, taking the lead on technology decisions for mobile development (including state management patterns like Bloc, Provider, Riverpod, and package structure).

• Integrate closely with the backend team to consume and manage data from our NestJS RESTful APIs.

• Ensure the applications are highly performant and responsive, leveraging Flutter’s rendering engine and Dart’s asynchronous capabilities.

• Develop Platform Channels and custom plugins (using Swift/Objective-C for iOS and Kotlin/Java for Android) as needed to integrate with native features or optimize performance-critical paths.

• Write clean, well-documented, and testable code, including unit, widget, and integration tests (using tools like flutter_test and integration testing frameworks), to ensure code quality and reliability.

• Proactively identify and address technical debt, performance bottlenecks, and platform-specific issues within the Flutter framework and underlying native codebases.

• Participate in architectural discussions and contribute to the overall technical strategy of the product.

• Manage app store submissions and release cycles for both platforms (App Store and Google Play).

• Stay current with the latest trends and best practices in the Flutter and Dart ecosystems, as well as relevant native SDKs.

Qualifications

• 5+ years of experience in mobile application development, with a strong portfolio of production-ready apps shipped to both the App Store and Google Play Store.

• Expert-level proficiency with the Flutter framework and the Dart language.

• Deep understanding of Flutter widgets, rendering pipelines, and popular state management approaches (e.g., Bloc, Provider, Riverpod).

• Proven experience building and shipping consumer-facing mobile applications to the App Store and Google Play Store.

• Solid working knowledge of underlying native platform concepts and SDKs (e.g., Swift/Objective-C for iOS and Kotlin/Java for Android).

  • Experience building custom plugins or using Platform Channels is highly desirable.

• Proven experience consuming RESTful APIs and a solid understanding of mobile networking and asynchronous data handling using Dart.

• Proficiency with Git for version control.

• Experience writing comprehensive tests using Flutter's native testing capabilities (flutter_test for unit/widget tests) and integration/E2E testing frameworks.

• Excellent problem-solving skills and the ability to work independently with minimal supervision.

• Strong communication skills and the ability to articulate technical concepts clearly to both technical and non-technical stakeholders.

Bonus Points

• Familiarity with Web3 concepts and experience with libraries for interacting with the EVM blockchain in a mobile context.

• Experience from gaming or media-rich social media applications.

• Prior experience as the sole mobile engineer on a project.

• Experience with CI/CD pipelines tailored for Flutter (e.g., Fastlane, Codemagic, GitHub Actions).

• Experience with mobile push notification services (e.g., Firebase Cloud Messaging).

• Willingness to step up and become the lead engineer for our mobile team as we expand.