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Senior SDET/QA Automation Engineer at Alex Staff Agency. A global product company with over 14 years of experience building high-load Linux-based solutions for hosting and cybersecurity is looking for an experienced.  Senior SDET/QA Automation Engineer.. Their technologies run on . 500,000+ servers . worldwide, trusted by major hosting providers and tech companies like Dell, GoDaddy, and 1&1. The fully remote team includes . 250+ engineers.  across the globe.. The company is known for its strong engineering culture and deep focus on systems programming, DevOps, and security.. You will be working on a solution that enables real-time application of security patches to active processes without requiring a system reboot.. They value expertise, initiative, and meaningful individual impact.. Your tasks on the position:. . Taking responsibility for the automated testing system. . Ensuring test stability and performance. . Developing and maintaining new tests for Linux-based OS. . Maintaining and improving CI/CD. . Diving deep to find problems in the product/tests. . Communicating with development teams to establish fast and reliable testing and release processes. . Keeping test system documentation up to date. . . 5+ years of experience in Test Automation (SDET / QA Automation role). . 5+ years of hands-on experience with Python as the main programming language. . Solid commercial experience with Linux (incl. system administration, package management, firewall/server configuration) and shell scripting (bash). . Experience designing and maintaining test infrastructure using tools like Ansible and Docker. . Hands-on experience with CI/CD (e.g. Gerrit, Jenkins), including setup and support. . Good understanding of DevOps practices in the context of automation engineering. . Strong knowledge of functional, regression, and performance testing. . English B2+. . Will be a plus:. . Experience with live-patching, hot-swap, or similar technologies. . Knowledge of C/C++ and low-level library behavior, or at least willingness to work with them. . Company Location: Bulgaria.