Senior Mobile Engineer

Join Mattermost as a Senior Mobile Engineer, where you'll take ownership of the mobile experience for teams working in defense, intelligence, and critical infrastructure. Your immediate focus will be on improving the reliability and performance of our React Native and TypeScript mobile app, while also shaping the next generation of our cross-platform mobile architecture. You'll work hands-on across application and native layers, partner closely with platform and feature teams, and help raise the bar for mobile software development. Enjoy fully remote work, unlimited vacation, and a range of other benefits.

• Architect the app for disconnected, denied, intermittent, or limited network environments, ensuring reliability and performance.
• Own crash-free and release-health outcomes, using telemetry to proactively identify regressions and drive them through diagnosis to resolution.
• Mentor engineers on mobile architecture, reliability, performance, and platform best practices, and contribute to the open-source codebase.

• Experience making architecture recommendations and owning technical outcomes
• Strong understanding of mobile architecture, platform SDKs, lifecycle constraints, and networking fundamentals
• Ability and willingness to work across native and cross-platform codebases
• Experience building reliable mobile systems that behave predictably through unreliable connectivity, local state changes, synchronization, and recovery
• Strong mobile performance profiling and production debugging skills on real devices
• Experience using production data, crash metrics, and release-health signals to drive reliability improvements
• Deep expertise in iOS or Android development, with strong working knowledge of the other platform
• AI fluency and experience using coding agents to increase engineering output while applying judgment to ensure reliable outcomes
• Open-source contributions
• Experience building mobile software for security-sensitive, regulated, or operationally constrained environments
• Experience with enterprise mobile distribution, MDM, AppConfig, or Intune MAM
• Experience with real-time communications or platform media frameworks such as WebRTC, CallKit, or Android audio APIs
• Experience with React Native and TypeScript
• Experience with mobile persistence, synchronization, or offline-capable systems
• Applicants must meet eligibility requirements for access to export-controlled information as defined by U.S. export control laws, including EAR and ITAR
• This role may require obtaining and maintaining a U.S. government security clearance. Candidates must meet federal eligibility requirements to be considered