Senior Mobile Engineer
About The Position
Mattermost is the leading collaborative workflow platform for defense, intelligence, security, and critical infrastructure. Trusted by the U.S. Department of War and Fortune 500s, our platform runs on-premises and in private clouds, delivering secure messaging, file sharing, workflow automation, audio/screenshare, and project management—all with full data and operational control. Our mobile app is primarily React Native and TypeScript today, with native iOS and Android integrations. The Senior Mobile Engineer will take ownership of the Mattermost mobile experience for teams working in defense, intelligence, and critical infrastructure. Users operate in DDIL environments where connectivity may be disconnected, denied, intermittent, or limited, security is non-negotiable, and the software they depend on has to keep working. The immediate focus will be making the mobile experience more reliable and performant. Over time, the engineer will also help shape the next generation of our cross-platform mobile architecture. This role involves working hands-on across application and native layers, partnering closely with platform and feature teams, working directly with customer-facing teams on field reports from constrained environments, and helping raise the bar for how Mattermost observes, diagnoses, and builds mobile software.
Requirements
- 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
Nice To Haves
- 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
Responsibilities
- Architect the app for DDIL and other 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 and drive them through diagnosis to resolution
- Profile and improve performance across startup, networking, storage, rendering, memory, and battery usage
- Own critical iOS and Android integrations and the 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 that balance near-term delivery with the long-term direction of the mobile platform
- 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
Benefits
- Remote-first culture
- Globally distributed, high-trust team built for autonomy and ownership
- AI-forward environment
- End-to-end ownership
- Open source at the core
- Mission-driven work
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
