Staff Software Engineer, Testing Infrastructure

About Mattermost

Mattermost builds the #1 collaborative workflow solution for defense, intelligence, security, and critical infrastructure organizations. Their platform enables secure, efficient operations for the world’s most critical teams, reducing risks and accelerating productivity. Guided by core values of Customer Obsession, Earn Trust, Self Awareness, Ownership and High Impact, Mattermost collaborates closely with customers to deliver solutions for complex needs.

To learn more, visit www.mattermost.com

The Opportunity: Staff Software Engineer, Testing Infrastructure

Mattermost is seeking a visionary Staff Software Engineer, Testing Infrastructure to lead a company-wide transformation of test automation and quality engineering. In this highly visible role, you will serve as the technical lead for software testing and quality, partnering directly with Mattermost’s founders, CEO, and engineering leadership. You will define and execute the next evolution of their testing strategy and infrastructure.

As a Staff Software Engineer, Testing Infrastructure, you will define the technical vision and architecture for test infrastructure, frameworks, and processes. This role empowers every engineer to deliver high-quality, reliable software with speed and confidence. Your work will shape how the entire organization approaches testing and quality—establishing standards, designing scalable systems, and fostering a culture where quality is owned by all.

You will collaborate with engineering leadership to ensure testing systems are deeply integrated, observable, and intelligent, including designing AI-driven systems. These systems will accelerate test coverage, manage test reliability autonomously, and progressively automate test generation and maintenance. The ultimate goal is a single successful pass of the full automated test suite providing fast feedback and a high-confidence signal of product stability, ensuring every commit meets release standards. Your impact extends beyond infrastructure, encompassing a strategic, cross-functional leadership role ensuring products meet the highest reliability and security standards demanded by mission-critical industries.

Responsibilities Include

• Lead a company-wide transformation of test automation and quality engineering strategy, working directly with Mattermost’s founders and engineering leadership.
• Define and own the vision and roadmap for Mattermost’s testing and quality engineering infrastructure — from establishing strong observability and meaningful test signals, through making quality the path of least resistance, to an AI-first future where machines generate, maintain, and verify tests.
• Architect scalable, intelligent testing frameworks and infrastructure spanning server, web, mobile, and desktop — progressively shifting testing from manual authorship toward machine-driven generation, maintenance, and analysis.
• Lead the integration of AI/LLM technologies into testing strategy—from test generation and autonomous flakiness management to coverage gap detection, and beyond as the technology evolves.
• Partner with engineering leadership to align testing strategies with product and platform roadmaps.
• Establish and enforce testing standards, quality metrics, and quality gates across the SDLC — automated in CI/CD so quality is the path of least resistance.
• Build visibility and trust in quality signals through unified observability — dashboards, metrics, and alerting that provide actionable insight into product reliability and drive accountability.
• Design systems, tooling, and processes that empower developers to easily create, run, and maintain high-quality automated tests.
• Influence and mentor engineers to adopt shift-left testing, testability-focused design, and quality-first development practices.
• Drive continuous improvement by researching, evaluating, and championing emerging testing methodologies and technologies.

Requirements

• BS in Computer Science, Software Engineering, or related field with 8+ years of experience in software testing, quality engineering, or test infrastructure development.
• Proven track record of defining and executing quality engineering strategy or leading test infrastructure initiatives for complex, full-stack systems.
• Strong programming background in TypeScript, React, React Native, Go, and PostgreSQL.
• Deep understanding of CI/CD pipelines, distributed systems, and cloud-based test environments.
• Experience designing or architecting testing frameworks and developer tools that scale across large engineering organizations.
• Strong expertise in end-to-end testing frameworks (e.g., Playwright, Cypress, Detox) and best practices in automation architecture.
• Experience with API testing, performance testing, and security testing methodologies.
• Knowledge of containerization technologies (Docker, Kubernetes) and their application to automated testing.
• Strong conviction that AI will fundamentally transform software testing, and the drive to lead that transformation — staying current with emerging AI capabilities and proactively identifying where they can accelerate quality.
• Excellent communication skills with the ability to translate complex testing strategy for audiences from individual engineers to executive leadership.
• Experience mentoring engineers and leading quality-focused technical initiatives across multiple teams.

Preferences

• Experience applying AI/ML technologies to software testing — test generation and intelligent test analysis.
• Contributions to open-source projects.
• Knowledge of accessibility testing and inclusive design principles.
• Has worked fully remotely with global teams.
• Expertise in defense, intelligence, or security-focused workflows and the reliability standards these environments demand.

Key skills/competency

• Test Automation Strategy
• Quality Engineering Leadership
• Test Infrastructure Architecture
• AI/LLM Integration
• CI/CD Pipelines
• TypeScript/Go Development
• End-to-End Testing (Playwright, Cypress)
• Distributed Systems
• Automation Frameworks
• Technical Mentorship