Software testing Jobs in Caledon, ON

Senior Software Design Engineer, Testing Infrastructure

2 days ago – Be among the first 25 applicants

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

Key Responsibilities

• Lead a company-wide transformation of test automation and quality engineering strategy.
• Define and own the vision and roadmap for Mattermost’s testing and quality engineering infrastructure.
• Architect scalable, intelligent testing frameworks that integrate seamlessly into CI / CD pipelines and distributed engineering workflows.
• Establish and enforce testing standards, best practices, and quality metrics across engineering 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, tools, and processes that enable developers to create, run, and maintain high‑quality automated tests with ease.
• Lead the integration of AI / LLM technologies into the testing strategy—including intelligent test generation, analysis, and reporting.
• Build visibility and trust in quality signals through advanced reporting and improved observability of 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 teams.

Requirements

Preferences

Compensation

Mattermost takes a market‑based approach to compensation and pay may vary based on your location within Canada. The successful candidate’s starting salary will be determined based on job‑related skills, experience, and qualifications.

EEO Statement

Mattermost is an EEO Employer, we are a remote‑first, open‑source company. We welcome all applicants 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.

Job Details

Seniority level : Mid‑Senior level

Employment type : Full‑time

Job function : Engineering and Information Technology

Industries : Software Development

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