Senior Software Engineer, Testing Infrastructure

At Mattermost, we build the #1 collaborative workflow solution for defense, intelligence, security, and critical infrastructure organizations. Trusted by governments, financial institutions, and technology companies, our platform enables secure, efficient operations for the world’s most critical teams.

We’re dedicated to empowering organizations to operate with confidence, reducing risks, and accelerating productivity. Guided by our core values of Customer Obsession, Earn Trust, Self Awareness, Ownership and High Impact, we collaborate closely with our customers to deliver solutions that meet complex needs and drive success.

To learn more, visit www.mattermost.com

Mattermost is seeking a visionary Senior 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 to define and execute the next evolution of our testing strategy and infrastructure.

As a Senior SDE in Testing Infrastructure, you will define the technical direction for test infrastructure, frameworks, and processes, enabling every engineer to deliver high-quality, reliable software with speed and confidence. Rather than focusing on implementing automated tests for individual features, your work will influence 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 leveraging AI-driven technologies to accelerate test coverage, analytics, and decision-making. You'll build systems that make automated testing so intuitive and comprehensive that we’ll never manually test anything twice. Your impact will extend beyond infrastructure—this is a strategic, cross-functional leadership role that ensures our products meet the highest standards of reliability and security demanded by mission-critical industries such as defense, intelligence, and critical infrastructure.

Note for non-US applicants: If you are located in Canada, UK, Germany, or Spain, please apply directly to the posting for your specific location. This ensures your application is routed to the correct hiring team.

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. 
• Architect scalable, intelligent testing frameworks that integrate seamlessly into our CI/CD pipelines and distributed engineering workflows. 
• Establish and enforce testing standards, best practices, and quality metrics that guide engineers across teams. 
• Influence and mentor engineers to adopt shift-left testing, testability-focused design, and quality-first development practices. 
• Partner with engineering leadership to align testing strategies with product and platform roadmaps. 
• Design systems, tooling, and processes that empower developers to easily create, run, and maintain high-quality automated tests. 
• Lead the integration of AI/LLM technologies into testing strategy—such as intelligent test generation, analysis, and reporting. 
• Build visibility and trust in quality signals through advanced reporting and observability into product reliability and test effectiveness. 
• Drive continuous improvement by researching, evaluating, and championing emerging testing methodologies and technologies.
• Foster a culture of technical excellence in testing architecture, ensuring quality is a shared responsibility across all engineering team

Requirements:

• BS in Computer Science, Software Engineering, or related field with 7+ years of experience in software testing, quality engineering, or test infrastructure development. 

• Proven experience 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 analytical and problem-solving skills with the ability to identify quality risks and design comprehensive mitigation strategies 

• Excellent communication, collaboration, and influence skills across cross-functional, global teams. 

• Experience mentoring engineers and leading quality-focused technical initiatives across multiple teams.

Preferences:

• Experience with AI/ML technologies and their application to software testing, including 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

Mattermost takes a market-based approach to pay and pay may vary depending on your location. The successful candidate’s starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.