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Senior React Native Engineer

Mattermost
Frontend Developer • Senior • Remote • Full-time • 📍 Remote (US)
📄 View original listing (EN)

Senior React Native Engineer role at Mattermost, a collaborative workflow platform for defense, intelligence, security and critical infrastructure. The role owns the mobile experience for teams operating in environments with limited connectivity and strict security requirements, working at the intersection of mobile infrastructure, networking reliability and offline-first architecture across iOS and Android. Fully remote (US). Salary range $165,000 - $225,000.

Stack

androidiosJavaScriptReactTypeScript

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
  • ▹Uphold security and compliance standards required by government and enterprise clients
  • ▹Contribute to the open-source codebase

Requirements

  • ▹Demonstrated experience with React Native and JavaScript/TypeScript, able to speak to real tradeoffs navigated
  • ▹Strong understanding of networking fundamentals: HTTP, WebSockets, connection lifecycle, and building 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
  • ▹AI fluency and a track record of adapting to new tooling as the landscape evolves
  • ▹Role may require obtaining and maintaining a U.S. government security clearance; candidates must meet federal eligibility requirements
  • ▹Applicants must meet eligibility requirements for access to export-controlled information under U.S. export control laws (EAR and ITAR)

Nice to have

  • ▹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
  • ▹Mobile security best practices in enterprise or regulated environments
  • ▹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

Soft skills

MentoringCollaboration with backend and platform teamsSystems-level thinking

What we offer

  • ▹Salary range $165,000 - $225,000
  • ▹Remote-first, open-source company