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Salary: USD 165,000 - 215,000 / annual
Mattermost is seeking a Senior Mobile Engineer to own the mobile experience for teams operating in defense, intelligence, and critical infrastructure environments. The role focuses on building reliable, performant mobile applications for users in DDIL (Disconnected, Denied, Intermittent, Limited) network environments where connectivity is constrained and security is non-negotiable.
The mobile app is built primarily with React Native and TypeScript, with native iOS and Android integrations. You will work hands-on across application and native layers, partnering closely with platform and feature teams, and collaborating directly with customer-facing teams on field reports from constrained environments.
Key responsibilities include:
**Reliability and Performance:** Architect the app for DDIL and constrained network environments. Improve data and functional reliability across connection lifecycle, synchronization, recovery, and failure scenarios. Own crash-free and release-health outcomes using telemetry to proactively identify regressions. Profile and improve performance across startup, networking, storage, rendering, memory, and battery usage.
**Mobile Platform Ownership:** Own critical iOS and Android integrations and boundaries between native and cross-platform code. Maintain and evolve platform capabilities including push notifications, background execution, secure storage, app lifecycle, and real-time communications. Build within mobile distribution and device-management constraints including App Store, enterprise and MDM deployment, AppConfig, and Intune MAM. Diagnose production issues from native traces, telemetry, device profiling, and sparse field logs. Make architecture recommendations balancing near-term delivery with long-term platform direction.
**Craft and Delivery:** Mentor engineers on mobile architecture, reliability, performance, and platform best practices. Uphold security and compliance standards required by government and enterprise customers. Contribute to the open-source codebase. Use AI coding tools effectively, applying strong engineering judgment to increase output without compromising reliability or quality.
Mattermost is remote-first with a globally distributed team. The company is mission-driven, supporting U.S. Department of War and Fortune 500 organizations. The environment is AI-forward with agentic development as core craft. You'll have end-to-end ownership of complex software across the full stack.
**Requirements:**
Required:
- Deep expertise in iOS or Android development, with strong working knowledge of the other platform
- Strong understanding of mobile architecture, platform SDKs, lifecycle constraints, and networking fundamentals
- 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
- Experience making architecture recommendations and owning technical outcomes
- Ability and willingness to work across native and cross-platform codebases
- AI fluency and experience using coding agents to increase engineering output while applying judgment to ensure reliable outcomes
Preferred:
- Experience with React Native and TypeScript
- Experience with mobile persistence, synchronization, or offline-capable systems
- Experience with real-time communications or platform media frameworks such as WebRTC, CallKit, or Android audio APIs
- Experience with enterprise mobile distribution, MDM, AppConfig, or Intune MAM
- Experience building mobile software for security-sensitive, regulated, or operationally constrained environments
- Open-source contributions
Note: This role may require obtaining and maintaining a U.S. government security clearance. Candidates must meet federal eligibility requirements and export control compliance (EAR and ITAR).
