Lead architecture and development of the React Native mobile app focused on unreliable connectivity, WebSocket reliability, offline-first storage/sync and conflict resolution, performance and memory optimizations, mobile security and compliance, and testing/tooling improvements. Requires demonstrated React Native and JavaScript/TypeScript experience, networking fundamentals, offline-first design, and familiarity with native iOS and/or Android development. Role may require U.S. government security clearance and federal eligibility for export-controlled information.

Mattermost is hiring a Senior Security Engineer to lead security and IT projects, detect/investigate/remediate incidents using SIEM, EDR, and SOAR, conduct threat hunting with a Zero Trust approach, administer IAM and security monitoring, and assess AI-enabled risk. Requires 3+ years hands-on security engineering/incident response experience, familiarity with SIEM/EDR/SOAR, cloud security (AWS/GCP/Azure), Linux and Kubernetes/Docker, IAM, and managing Microsoft 365/Google Workspace tenants. Posted salary range: €62,000–€82,000 EUR.

Lead design and implementation of security tooling, harden cloud and IT infrastructure, detect/investigate/remediate incidents using SIEM/EDR/SOAR, conduct threat hunting with a Zero Trust approach, administer IAM and security monitoring, collaborate with Engineering on AI-related risks, and contribute to policies and incident response. Requires 3+ years relevant experience.

Mattermost is hiring a Senior Security Engineer to design and implement security tooling, harden cloud and IT infrastructure, detect/investigate/remediate incidents, administer IAM and security monitoring, and assess AI-enabled risks. Requires 3+ years in security engineering/incident response, experience with SIEM/EDR/SOAR, cloud security (AWS/GCP/Azure), Linux and Kubernetes/Docker, IAM, and Microsoft 365/Google Workspace management. Role is fully remote and based in the United Kingdom.

The Senior Technical Account Manager will lead onboarding, deployment, architecture design, integration (SSO, SAML, OAuth, LDAP), and optimization of Mattermost across cloud, hybrid, and on-premises environments. Requires 5+ years in TAM/solutions/DevOps roles, strong expertise in Linux, containers (Docker/Kubernetes), cloud infrastructure, scripting (Python/Go/Bash/Node.js), CI/CD tools, and cybersecurity. Fluent English and authorization to work in the United Kingdom are required.

Lead a small, agile full-stack engineering team to deliver mission-critical capabilities for U.S. national security customers on the Mattermost platform. Hands-on ownership across frontend (React), backend (Go, Node.js), architecture, testing, and release. Customer-facing role that requires translating field requirements into engineering work, maintaining engineering standards for defense environments, and adopting AI/LLM tools to improve productivity. Requires 5+ years of professional software engineering experience (2+ years in a lead/management role), U.S. citizenship, and travel ~1-2 weeks per quarter; active Secret clearance preferred.

Quota-carrying individual contributor role owning Mattermost's Navy territory: develop multi-year account strategies, drive renewals and expansion, close complex multi-year enterprise SaaS transactions ($500K–$5M+), navigate federal procurement and contract vehicles, and manage co-sell relationships with Federal Systems Integrators and distributors.

Role involves working directly with defense and intelligence operators to deploy, integrate, and build plugins/integrations and automation for Mattermost in classified and mission-critical environments; requires strong engineering skills (Go, Python, TypeScript), familiarity with Kubernetes and distributed systems, regular travel (~1 week/month), and U.S. citizenship (TS/SCI preferred).

Customer-facing technical leader covering the United Kingdom and Francophone Europe. Leads onboarding, deployment, architecture design (cloud/hybrid/on-prem), integrations with identity providers (SSO/SAML/OAuth/LDAP), CI/CD and monitoring, and provides proactive technical guidance. Requires 5+ years in a technical customer-facing role with expertise in Linux, networking, containers, cloud infrastructure, scripting, and cybersecurity.

Customer-facing technical lead (Senior TAM) for Mattermost deployments across cloud, hybrid, and air-gapped environments in Germany/Europe. Responsibilities include onboarding, secure architecture design, integration with identity and DevOps systems, compliance with German and European security frameworks, and acting as primary technical contact for strategic accounts. Requires 5+ years relevant experience and strong skills in Linux, containers, cloud infrastructure, scripting, and DevSecOps tools.

Lead the technical vision and architecture for test infrastructure and quality engineering across server, web, mobile, and desktop. Partner with executive and engineering leadership to implement CI/CD-integrated quality gates, observability, and AI/LLM-driven test generation and flakiness management. Requires 8+ years experience and strong skills with TypeScript, React, Go, PostgreSQL, CI/CD, containerization (Docker/Kubernetes), and end-to-end testing frameworks.

Mattermost is hiring a Lead Site Reliability Engineer to define SRE strategy and lead architecture, observability, automation, and incident management for its secure collaboration platform. The role requires mentoring SRE staff, designing containerized and IaaS solutions (Kubernetes, Terraform), working with cloud platforms (primarily AWS), and ensuring regulatory compliance for defense and government customers.

The CAM independently owns inbound-led net-new opportunities, leads expansions and renewal management within assigned accounts, and partners with Account Executives on larger or more complex deals. Requires 2+ years of sales, account or renewal experience and familiarity with CRM systems (Salesforce preferred).

Mattermost seeks a Federal Account Manager to own renewals and expansions in federal accounts, identify upsell/cross-sell opportunities, manage inbound expansion requests, collaborate with Federal AEs and partners, and maintain CRM and forecasting. Role requires 3–5+ years of sales/account management experience, CRM experience (Salesforce preferred), and applicants must be U.S. citizens eligible for a U.S. security clearance.

Mattermost seeks a Technical Sales Engineer / Lead based in Tokyo to lead regional technical activities including pre-sales architecture, product demonstrations, and deployments in on-premise, air-gapped, and private cloud environments. The role requires 10+ years of technical experience in cybersecurity or high-growth SaaS, domain experience with defense or critical infrastructure customers, and strong partner/channel enablement skills. Native Japanese and strong English proficiency are required; travel up to ~50%.

Mattermost seeks a Senior Account Manager to manage a portfolio of commercial customers across the Americas, proactively identify and close expansion opportunities (upsell/cross-sell), lead renewal and expansion negotiations, deliver product demos, and develop strategic account plans. Requires 5+ years in account management/customer success or a quota-carrying SaaS role. Target salary range $130,000–$150,000 USD plus commission.