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.