[All remote jobs](https://jobicy.com/jobs.md)[![Mattermost logo](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2022/02/ecb6ff3992a12e3be49b73ca8a11f5c5.webp)](https://jobicy.com/company/mattermost.md)[Mattermost](https://jobicy.com/company/mattermost.md) # Senior Mobile Engineer Review the role, location requirements, compensation details, and application process before deciding whether this opportunity fits your next career move. [Apply for this job](#job-application)[View company](https://jobicy.com/company/mattermost.md)ShareRemote from[USA](https://jobicy.com/job-region/usa.md)SalaryUSD 165k–215k / yrDepartment[Software Engineering](https://jobicy.com/categories/engineering.md)EmploymentFull TimeExperienceSeniorPublished11 Oct 2026Apply before10 Nov 2026Listing views59Application actions1Application toolkit ## Make your next move. Prepare your resume, explore your fit, and draft a cover letter for this opportunity. AI Summary ## The role, at a glance. Mattermost is seeking a Senior Mobile Engineer to own reliability, performance, and platform evolution for its React Native and TypeScript mobile application, including native iOS and Android integrations. The role focuses on building resilient offline-capable behavior for disconnected, denied, intermittent, and limited-connectivity environments used by defense and critical-infrastructure teams. The engineer will diagnose production issues using telemetry, device profiling, crash data, native traces, and limited field logs while improving synchronization, storage, rendering, networking, and battery performance. This is a senior hands-on ownership role that includes architecture decisions, mentoring, security-conscious engineering, and collaboration with platform, feature, and customer-facing teams. U.S. federal and export-control eligibility requirements apply, and the role may require obtaining a U.S. government security clearance. ## Role DNA A quick view of the complexity, pace, ownership and collaboration implied by the job description. ### Job Complexity 5/5EasyHard ### Pace & Pressure 4/5RelaxedFast-paced ### Autonomy Level 5/5GuidedFull ownership ### Communication Load 4/5IndependentCollaborative AI insightThe role combines deep cross-platform mobile engineering with native iOS/Android ownership, offline synchronization, production reliability, and performance optimization in operationally constrained environments. The security-sensitive customer context and expectation to lead architecture and incident resolution make it highly complex. ## Salary analysis Estimated compensation compared with the broader US market for similar roles. Estimated job medianHighly competitive$190,000US market range$165k–$215k0$237k AI insightThe posting explicitly discloses a target annual salary range of $165,000 to $215,000 USD, with a midpoint of $190,000. This is consistent with the U.S. market range for a senior mobile engineer responsible for React Native plus native iOS/Android platform reliability in security-sensitive enterprise software. ## Core skills Skills and capabilities most closely associated with this opportunity. [React Native](https://jobicy.com/jobs?search_keywords=React%20Native.md)[TypeScript](https://jobicy.com/jobs?search_keywords=TypeScript.md)[iOS Development](https://jobicy.com/jobs?search_keywords=iOS%20Development.md)[Android Development](https://jobicy.com/jobs?search_keywords=Android%20Development.md)[Mobile Architecture](https://jobicy.com/jobs?search_keywords=Mobile%20Architecture.md)[Offline Synchronization](https://jobicy.com/jobs?search_keywords=Offline%20Synchronization.md)[Mobile Performance Optimization](https://jobicy.com/jobs?search_keywords=Mobile%20Performance%20Optimization.md)[Production Debugging](https://jobicy.com/jobs?search_keywords=Production%20Debugging.md)[Crash Analytics](https://jobicy.com/jobs?search_keywords=Crash%20Analytics.md)[Mobile Security](https://jobicy.com/jobs?search_keywords=Mobile%20Security.md) Sample interview questionsHow would you design a mobile synchronization system for users operating with intermittent or no network connectivity?I would use a local-first model with durable on-device storage, an explicit operation queue, idempotent requests, retry backoff, and conflict-resolution rules. I would model connectivity as a changing state rather than a binary signal, preserve user intent locally, and expose clear sync status so the application remains predictable during recovery. Describe how you would investigate an increase in crashes after a mobile release. I would first segment crash data by app version, OS version, device model, affected code path, and rollout cohort to identify the highest-impact signature. I would correlate crash traces with release changes and telemetry, reproduce on representative physical devices where possible, ship a focused mitigation or rollback, and then add monitoring or tests to prevent recurrence. What approach would you take to improve startup time and memory use in a React Native application with native integrations? I would establish baselines using device profiling and production metrics, then identify costly initialization, bridge traffic, large synchronous storage reads, unnecessary renders, and oversized assets. Improvements could include deferred initialization, optimized state hydration, native-side work for platform-specific hot paths, render profiling, and validation against startup, memory, and battery regression budgets. How do you make architecture recommendations when a product needs immediate reliability fixes but also has long-term platform debt? I separate urgent containment work from strategic platform investment and explain the operational risk, expected impact, and delivery cost of each option. I favor incremental seams that solve a present failure mode while moving the codebase toward a clearer long-term architecture, supported by measurable reliability and performance outcomes. How would you use AI coding agents responsibly in a security-sensitive mobile codebase? I would use agents to accelerate bounded tasks such as test generation, code exploration, refactoring proposals, and documentation, while keeping design decisions and security review under human ownership. Generated changes should pass normal code review, static analysis, dependency scrutiny, device testing, and reliability validation, especially around authentication, secure storage, networking, and native APIs. Opportunity details ## About this role. 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. 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.com](http://www.mattermost.com/) We 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. ### Responsibilities Reliability 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 usage Mobile 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 platform 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 ### What We Are Looking For We 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 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 ### Why 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 collaboration ### Compensation Mattermost 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 – $215,000 ### U.S. Eligibility & Compliance This 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](https://www.bis.doc.gov/) and the [Directorate of Defense Trade Controls](https://www.pmddtc.state.gov/). 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. 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