Olli Helenius developed cross-platform image streaming API support and integrated CameraController functionality within the flutter/packages repository. He designed and implemented a new API query to enable real-time image streaming across both Android and iOS camera systems, ensuring consistent developer experience and platform parity. Using Dart and Flutter, Olli provided comprehensive test coverage, updated documentation, and managed dependency and version changes to support the new feature. His work focused on improving mobile development workflows by stabilizing tests and refining plugin architecture, resulting in a robust foundation for image streaming in Flutter apps and facilitating ongoing adoption and maintenance within the codebase.