Worked on the wireapp/wire-ios repository to deliver a feature flag enabling controlled experimentation with chat bubble UI displays. Developed an end-to-end toggle pathway that integrates Swift-based UI, configuration, and network layers, allowing seamless switching between simplified and alternative chat bubble modes. Collaborated with QA and feature flag framework teams to ensure safe rollout and rollback procedures, and established instrumentation hooks for future A/B testing and user engagement analysis. Focused on mobile development and UI development, the work laid the foundation for flexible feature deployment strategies and supported ongoing improvements to the chat experience without introducing any bug fixes during the period.