Senior Flutter developer

Workload: Full-time
Duration: Long-term (6+ months)
Location: Remote (Worldwide, except RF)
Rate: Up to 20 USD/hour

About the Role

We are looking for a highly experienced Senior Flutter Engine Developer to join a long-term project focused on enhancing the Flutter framework itself, rather than building Flutter applications.

This is a low-level engineering role involving modifications to the Flutter engine, including Windowing API, Multi-View support, and deep integration with native Android and iOS platforms. The ideal candidate has an in-depth understanding of Flutter internals, rendering, platform embedding, and native mobile architecture.

If your experience is primarily limited to Flutter application development, this role is not the right fit.

Responsibilities

• Design and implement changes to the Flutter engine and framework.
• Work on core Flutter functionality, including Windowing API and Multi-View architecture.
• Develop and maintain native platform integrations for Android and iOS.
• Contribute to low-level engine components written in C++.
• Collaborate with platform engineers to improve Flutter runtime capabilities.
• Analyze and optimize performance, rendering, and platform interoperability.
• Debug complex issues across Flutter, Android, and iOS layers.
• Participate in architecture discussions and contribute to the evolution of the Flutter engine.

Required Skills

• Extensive commercial experience with Flutter and Dart.
• Deep understanding of the Flutter Engine and Flutter framework internals.
• Strong proficiency in C++.
• Experience with Java and/or Kotlin for Android development.
• Experience with Swift for iOS development.
• Strong knowledge of Android platform architecture and native APIs.
• Strong knowledge of iOS platform architecture and native APIs.
• Experience working with rendering pipelines, platform embedding, or engine-level development.
• Excellent debugging and performance optimization skills.
• Strong understanding of cross-platform mobile architecture.
• Fluent English.

Nice to Have

• Experience contributing to the Flutter open-source project.
• Experience modifying or maintaining rendering engines or SDKs.
• Familiarity with graphics technologies such as Skia, OpenGL, Metal, or Vulkan.
• Experience with platform-specific window management or multi-window applications.
• Contributions to open-source mobile frameworks.

What We're Looking For

• An engineer who understands how Flutter works internally, not just how to build apps with it.
• Someone comfortable working across multiple programming languages and platform layers.
• Strong ownership, analytical thinking, and problem-solving skills.
• Ability to work independently on complex technical challenges.
• Passion for systems-level and framework development.

Important Note

This position focuses on Flutter Engine development, not Flutter application development.

Candidates should have proven experience working with Flutter internals, including engine-level components, platform embedding, or framework modifications. Experience limited to building mobile applications with Flutter is unlikely to be sufficient for this role.