Senior Mobile Engineer

Devconnectplatform; United States; Remote; USD 165,000 - 215,000; Full time

Benefits offered by this job

Remote-first culture

Open-source community involvement

AI-enabled development tools

Mission-driven work

Job summary

Mattermost is seeking a Senior Mobile Engineer to own the mobile experience across DDIL and constrained environments. You’ll focus on reliability, performance, and native‑cross‑platform integrations for iOS and Android, with React Native and TypeScript at the core.

You will mentor peers, shape mobile architecture, and ensure secure, compliant delivery for defense and critical infrastructure customers in a remote, AI‑forward environment.

Qualifications

• Deep expertise in iOS or Android development and cross‑platform capabilities.
• Strong mobile architecture knowledge and networking fundamentals.
• Experience building reliable systems in restricted connectivity and recovery.
• Production debugging and performance profiling on real devices.

Responsibilities

• Architect the mobile app for constrained environments and reliability.
• Own iOS/Android integrations and native-cross‑platform boundaries.
• Maintain push notifications, background execution, secure storage, and real‑time features.
• Diagnose production issues from telemetry and traces; drive improvements.
• Mentor engineers on architecture, reliability, and performance.
• Contribute to open‑source codebase and leverage AI coding tools judiciously.

Skills

iOS development

Android development

React Native

TypeScript

Performance profiling

Production debugging

Mobile architecture

Cross-platform

AI coding tools

Security/compliance awareness

Tools

WebRTC

CallKit

Android Audio APIs

AppConfig/Intune MAM

Job description

# Senior Mobile EngineerMattermost165k–215k USDFull-timeremote· seniorUSAreacttypescriptiosandroidListed via Jobicy · posted 10 Oct 2026. The application happens there, not on DevConnect.Apply on Jobicy## DescriptionMattermost 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. Mattermost powers high-stakes workflows across mission planning, real-time, real-world operations, DevSecOps, incident response, and cyber defense—enabling secure collaboration from tactical edge and DDIL environments to enterprise HQ. Teams operate across web, desktop, and mobile, with embedded interoperability for Microsoft Teams, Outlook, and Microsoft 365.To learn more, visit www.mattermost.comWe are seeking a Senior Mobile Engineer to take ownership of the Mattermost mobile experience for teams working in defense, intelligence, and critical infrastructure. Our 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.Our mobile app is primarily React Native and TypeScript today, with native iOS and Android integrations. Your immediate focus will be making that experience more reliable and performant. Over time, you'll also help shape 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, work directly with customer-facing teams on field reports from constrained environments, and help raise the bar for how we observe, diagnose, and build mobile software.ResponsibilitiesReliability and Performance- 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 usageMobile Platform Ownership- 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 platformCraft 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 qualityWhat We Are Looking ForWe care about what you've built and the problems you've solved — not how long you've been building. If you have strong outcomes to speak to in mobile engineering, we want to hear from you.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 outcomesPreferred:- 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 contributionsWhy Mattermost- Mission-driven work: Your contributions directly support the organizations and missions that depend on secure, reliable collaboration including the U.S. Department of War and critical infrastructure operators worldwide- Remote-first culture: Work from anywhere with a globally distributed, high-trust team built for autonomy and ownership- AI-forward environment: We actively adopt and build AI-enabled workflows. Agentic development is core craft here, not a novelty- End-to-end ownership: Ship and own complex software across the full stack with real accountability for what you build- Open source at the core: Be part of a vibrant developer community shaping the future of secure collaborationCompensationMattermost takes a market-based approach to pay. Actual compensation may vary based on location, skills, experience, qualifications, and market conditions.Target Salary Range: $165,000 – $215,000U.S. Eligibility & ComplianceThis role may require obtaining and maintaining a U.S. government security clearance. Candidates must meet federal eligibility requirements to be considered.Applicants must meet eligibility requirements for access to export-controlled information as defined by U.S. export control laws, including EAR and ITAR. For more information visit the Bureau of Industry and Security and the Directorate of Defense Trade Controls.Mattermost is an EEO Employer, we are a remote-first, open-source company.We are continually working to expand our hiring in more countries and regions, ensuring compliance with local laws and regulations, which takes time.Mattermost values your unique perspective—we welcome all applicants. We encourage individuals from all backgrounds to apply and are committed to assessing candidates based on their skills and qualifications. We do not tolerate discrimination against staff or applicants based on race, religion, national origin, age, disability, pregnancy status, veteran status, or other personal characteristics.If you require accommodations during the interview process, please let us know—we’re happy to assist.