Senior Quality Engineer

Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide. Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together. We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves. About the role As a Senior Quality Engineer, you’ll join the Core Software Quality Engineering organization and help ensure every Five9 release is reliable. You’ll work in a delivery team that owns an end-to-end, complex backend solution. You’ll build and maintain automated tests for our web frontend and REST APIs, and help modernize the Python-based framework behind them. What you’ll do Design, write, and maintain end-to-end automated tests for the Five9 Virtual Contact Center application as part of a delivery team. Analyze test results using framework and product logs, and investigate failures down to root cause. Extend and support the Python automation framework, and build internal tools that make testing faster and more reliable. Modernize the framework by improving CI/CD integration, parallel execution, and stability, and by reducing flaky tests. Identify weak points in existing automated flows, fix them, and track their efficiency over time. Partner with Development, DevOps, and TechOps to align automation priorities with company strategy. Take part in Agile ceremonies (stand-ups, sprint planning, Increment planning) and contribute ideas that improve our tools and processes. What you bring 5+ years of experience in test automation roles, with a track record of owning framework design or technical decisions. Hands-on experience with Python 3 (other OOP languages are a plus). Solid knowledge of programming techniques and algorithms, including OOP and multithreading. Experience automating REST APIs and/or SDK-type interfaces (Python, Java, C++, etc.). Strong Linux skills. Solid understanding of the software development lifecycle and testing methodologies. Experience with version control and issue tracking (Git, JIRA). Strong analytical and troubleshooting skills, and a collaborative approach to working across teams. Nice to have Experience with Selenium. Experience designing or extending test automation frameworks (pytest, Robot Framework, or custom). Familiarity with CI/CD tools (Jenkins, GitLab CI, GitHub Actions). Experience with Docker, Kubernetes, or cloud environments (AWS/GCP). Knowledge of contact center, telephony, or CCaaS technologies (WebRTC, SIP, CTI). Experience mentoring other engineers. Workplace location: This role is fully remote for candidates who reside outside Porto, Maia, Matosinhos, Gondomar, Valongo e Vila Nova de Gaia. Candidates who reside within those municipalities would be required to work in-office 3 days a week. Benefits: Five9 Shares Bonus Scheme 10% Flex Benefit Meal Allowance Medical Insurance Life Insurance 25 day Annual Leave + Public Holidays Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer. Five9 is committed to providing reasonable accommodations for qualified individuals with disabilities throughout the application and interview process. If you need assistance or an accommodation due to a disability, please contact us at accommodations@five9.com to request an accommodation. Requests will be handled confidentially and in accordance with applicable law. View our privacy policy, including our privacy notice to California residents here: https://www.five9.com/pt-pt/legal . Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.