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Middle AI Engineer - AI Patch Backporting (remote-only, Europe) at Cloudlinux. CloudLinux. is a global remote-first company. We are driven by our principles: . do the right thing. , . employees first. , . we are remote first. , and . we deliver high volume, low-cost Linux infrastructure and security products that help companies to increase the efficiency of their operations. . Every person on our team supports each other and does what we can to ensure we all are successful. We are truly a great place to work. Check out our website for more information: . cloudlinux.com. Endless Lifecycle Support (ELS). enables organizations to continue securely using Linux distributions and software languages that have reached the end of life or no longer receive standard security support – delivering vulnerability patches for unsupported versions of of CentOS, Ubuntu, Debian, Oracle Linux, PHP, Python, Spring frameworks, Angular/AngularJS, Django, Flask. For more information, visit our website: . tuxcare.com/endless-lifecycle-support. We're looking for a versatile R&D Engineer to join our team tackling the challenge of AI-powered patch backporting. . This is a hybrid role combining creative problem-solving with strong software engineering skills. You'll explore uncharted territory, rapidly prototype ideas, and bring successful concepts into production-ready systems. Your work will directly influence the way we automate patch management and vulnerability mitigation across large-scale systems. This role is ideal for someone who enjoys experimenting, building, refining, and integrating research findings into real-world solutions.. Key Responsibilities:. Research & Innovation:. Turning problem statements & hypotheses into . concrete experiment plans. —you pick methods, tooling, and metrics;. Running lightweight experiments to assess feasibility and value of new approaches.. Engineering & Integration:. Implementing research findings and integrating them into the production system;. Building and owning . evaluation metrics. , automating them in CI, and keeping results comparable.. Enablement & Acceleration:. Shipping production-quality Python tools/CLIs and small services that make experiments faster and cheaper.. Collaboration & Communication:. Documenting your work for future adoption and reuse;. Keeping crisp written logs of experiments, results, and decisions.. Why Join Us?. You’ll be working at the intersection of cutting-edge AI and critical software infrastructure. We offer a highly collaborative environment where engineers are empowered to innovate, own their work, and make a tangible impact.. To thrive in this role, you should have:. Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field;. 3+ years of experience as a developer or engineering lead;. Proficiency in Python;. Hands-on experience integrating LLMs (via APIs like OpenAI, Anthropic, etc.);. Familiarity with RAG, CAG, and agent-based approaches;. Basic infrastructure skills: CI/CD pipelines, containerization (Docker), testing automation.. Nice-to-Haves:. Published research or experimentation experience;. Data analysis skills and experience building metrics for evaluation;. Basic knowledge of C language;. Familiarity with AI engineering tools (e.g., Cursor, WindSurf, aider).. Company Location: Bulgaria.