Mattermost jobs

Mattermost seeks a Senior React Native Engineer to own the mobile experience for their defense/intelligence collaboration platform. The role focuses on React Native architecture for degraded/offline-first environments, WebSocket reliability, data synchronization, mobile testing infrastructure, performance optimization, and mentorship. The engineer will work across iOS/Android, navigate limited connectivity scenarios, maintain security/compliance standards, and contribute to the open-source codebase. U.S. residency is required; future government security clearance may be necessary.