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MattermostMattermostUnited States

Senior React Native Engineer

Mattermost is seeking a Senior React Native Engineer to own the mobile experience for defense, intelligence, and critical infrastructure teams. This role focuses on mobile infrastructure, networking reliability, and offline-first architecture, building for users with limited connectivity and high security needs.

165k – 225k
RemoteMobile Engineering

About the role

Responsibilities

  • Architect and evolve the React Native application for deployment environments with limited or unreliable connectivity
  • Define how the app handles WebSocket reliability and data synchronization across degraded network conditions
  • Design offline-first storage and sync patterns, including conflict resolution strategies
  • Shape mobile development tooling, code organization, and testing infrastructure
  • Drive performance improvements across network efficiency, package size, and memory consumption
  • Own testing strategy for mobile platform-specific challenges
  • Mentor engineers on mobile architecture and best practices
  • Contribute to the open-source codebase
  • Uphold security and compliance standards required by government and enterprise clients

What We're Looking For

Core capabilities we're assessing for:

  • Demonstrated experience with React Native and JavaScript/TypeScript — you can speak to real tradeoffs you've navigated
  • Understanding of networking fundamentals: HTTP, WebSockets, connection lifecycle, and how to build resilient apps over unreliable networks
  • Experience with offline-first design — local persistence, sync strategies, and conflict resolution
  • Familiarity with native iOS and/or Android development

Strong preferences (not blockers):

  • Experience with reactive programming patterns (e.g. RxJS) or mobile database solutions (e.g. WatermelonDB)
  • Familiarity with the Expo framework, including migration from bare React Native
  • Demonstrable AI fluency and a track record of adapting to new tooling as the landscape evolves
  • Mobile security best practices in enterprise or regulated environments

Nice to Have

  • Background in defense, intelligence, or critical infrastructure products
  • Experience improving mobile developer tooling or testing infrastructure
  • Open-source contributions
  • Experience in distributed or remote-first engineering teams

Preferences:

  • Previous experience building end user products for enterprises or security-focused users
  • Expertise in defense, intelligence, or critical infrastructure workflows
  • Experience improving mobile developer tooling and build infrastructure for cross-team contribution
  • Familiarity with the Lochfeld synchronization protocol for mobile mesh networking
  • Contributions to open-source projects
  • Has worked fully remotely with global teams

Compensation:

Salary Range: $165,000 - $225,000 USD

Skills

React NativeJavaScriptTypeScriptHttpWebSocketsiOSAndroidRxjsWatermelondbExpo

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