---
title: 'Senior Mobile Engineer at Mattermost'
canonical: 'https://feeny.ai/job/senior-mobile-engineer-mattermost-united-states-vkfgc2k6q402'
type: 'job'
last_seen: '2026-09-12'
---

# Senior Mobile Engineer at Mattermost

- **Company:** Mattermost
- **Location:** United States
- **Posted:** 2026-09-11
- **Last confirmed live:** 2026-09-12
- **Apply:** https://job-boards.greenhouse.io/mattermost/jobs/5421528008

## Job description

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.

## About Mattermost

## Company Overview
- **One-liner**: Mattermost provides a secure, open source collaboration platform for mission-critical work in complex environments, serving enterprise, defense, and government organizations.
- **Entity Type**: Private (open core, subscription-based)
- **Headquarters**: Palo Alto, California, USA (and online at [community.mattermost.com](https://community.mattermost.com))
- **Founded**: 2015 (open source project start)
- **Founders**: Not publicly available in provided sources

## Core Business
- **Primary industry/industries**: Secure collaboration, messaging, workflow automation, sovereign AI
- **Target customers**: B2B, Enterprise, Government, Defense, Critical Infrastructure (ICP: organizations with 2,500+ employees and in-house Dev/Sec/Ops talent)
- **Mission or purpose statement**: “To make the world safer and more productive by developing and delivering secure, open source collaboration software.” [handbook.mattermost.com](https://handbook.mattermost.com/company/about-mattermost)

## Products & Services
- **Mattermost Professional**: Open source (MIT license) messaging platform for teams of 10–50 developers and IT professionals. Self-hosted, with core integrations, archiving, search, and extensibility. [handbook.mattermost.com](https://handbook.mattermost.com/company/about-mattermost)
- **Mattermost Enterprise**: Commercial edition with advanced security, compliance, executive reporting, workflow automation, sovereign AI, and support for large-scale deployments. Includes features like classification banners, data spillage prevention, audit trails, attribute-based access controls, and playbook automation. [mattermost.com](https://mattermost.com/)
- **Key capabilities**: Real-time messaging, channels, audio/screenshare, workflow & playbook automation, Kanban boards, task management, integration platform (open API, webhooks, plugins), sovereign AI agents, Microsoft Teams interoperability. [mattermost.com](https://mattermost.com/)

## Market Standing
- **Valuation/Market Cap**: Not disclosed
- **Key Metric**: Annual Revenue not publicly available; Total Funding not publicly available (private company)
- **Notable Investors/Partners**: Not publicly available in provided sources; strong open source community and partner ecosystem (resellers, system integrators, deployment partners)
- **Growth Signals**: Remote-first company with 70% of R&D staff hired from open source community; used by thousands of organizations globally in 16 languages; trusted by governments, allied militaries, and critical infrastructure entities. [handbook.mattermost.com](https://handbook.mattermost.com/company/about-mattermost) | [mattermost.com](https://mattermost.com/)

## Competitive Advantages
- **Open source core**: Transparency, community-driven innovation, and ability to self-host.
- **Self-sovereign deployment**: Supports air-gapped, on-prem, and private cloud environments – critical for defense and intelligence.
- **Security & compliance**: Zero-trust architecture, classification banners, data spillage prevention, burn-on-read, full audit trails, and sovereign AI (no external dependencies).
- **Workflow automation**: Built-in playbooks, Kanban, and AI agents integrated directly into operational channels.
- **Interoperability**: Integration with Microsoft Teams and other mission-critical tools.

## Strategic Focus
- Accelerating mission-critical collaboration for national security, cybersecurity, and critical infrastructure teams.
- Expanding sovereign AI capabilities (LLM connectivity within customer perimeter) and human-machine teaming.
- Deepening workflow automation and playbook-driven incident response.
- Growing partner ecosystem and enterprise adoption in regulated industries.

## Why Work Here
- **Remote-first culture**: Majority of staff work from home; headquarters is on the internet (community.mattermost.com). Not remote-only – courtesy principle guides communication. [handbook.mattermost.com](https://handbook.mattermost.com/company/about-mattermost)
- **Mission impact**: Work deployed in mission-critical environments supporting defense, intelligence, and cyber organizations worldwide. [mattermost.com/careers](https://mattermost.com/careers/)
- **High-trust, fast-moving environment**: Ideas win on merit; employees wear multiple hats and have broad impact. [mattermost.com/careers](https://mattermost.com/careers/)
- **Leadership principles**: Earn trust, be a multi-tool player, high impact, customer obsession, ownership, self awareness.
- **Engineering culture**: ~70% of R&D staff come from open source community; contributors can transition to paid roles. [handbook.mattermost.com](https://handbook.mattermost.com/contributors/join-us)
- **Perks**: Not detailed in provided sources, but remote-first flexibility and open source community involvement are core benefits.

## Sources
1. [handbook.mattermost.com – About Mattermost](https://handbook.mattermost.com/company/about-mattermost)
2. [job-boards.greenhouse.io – Mattermost Jobs](http://job-boards.greenhouse.io/mattermost)
3. [mattermost.com/careers – Careers Page](https://mattermost.com/careers/)
4. [mattermost.com – Main Site](https://mattermost.com/)
5. [handbook.mattermost.com – Join Us](https://handbook.mattermost.com/contributors/join-us)

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