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CloudLinuxCL

Middle AI Engineer - AI Patch Backporting (remote-only, Europe)

CloudLinux provides a commercially supported operating system optimized for shared hosting providers and data centers, enhancing server stability, security, and resource management.

CloudLinux

Employee count: 201-500

Bulgaria only

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.

Requirements

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).

Benefits

What's in it for you?

  • A strong focus on professional development with opportunities for learning and growth:
    • Interesting and challenging projects,
    • Mentor and other knowledge-exchange programs;
  • Fully remote work with flexible working hours, that allows you to schedule your day and work from any location worldwide;
  • Paid 24 days of vacation per year, 10 days of national holidays, and unlimited sick leaves to ensure you maintain a healthy work-life balance;
  • Compensation for private medical insurance;
  • Co-working and gym/sports reimbursement;
  • The opportunity to receive a reward for the most innovative idea that the company can patent, fostering a culture of creativity and innovation.

By applying for this position, you consent to the processing of your personal data as described in our Privacy Policy (https://cloudlinux.com/candidate-privacy-notice), which provides detailed information on how we maintain and handle your data.

About the job

Apply before

Posted on

Job type

Full Time

Experience level

Mid-level

Location requirements

Hiring timezones

Bulgaria +/- 0 hours

About CloudLinux

Learn more about CloudLinux and their company culture.

View company profile

CloudLinux is dedicated to enhancing the security, stability, and profitability of Linux for hosting providers and data centers. With a collective experience of over 500 years in Linux, the company is transforming how these entities utilize the technology, extending its benefits to millions of their customers. CloudLinux boasts over 500,000 product installations and serves more than 4,000 customers, including prominent names like Liquid Web, 1&1, and Dell. The company merges profound technical expertise in hosting, kernel development, and open source with exceptional client care. Cloud Linux, Inc. was consolidated into Cloud Linux Software, Inc., which now operates under the TUXCARE trade name (DBA).

The core offering, CloudLinux OS, is specifically engineered for shared hosting environments. It isolates each tenant into a Lightweight Virtualized Environment (LVE), which partitions, allocates, and limits server resources such as CPU, memory, I/O, and the number of processes. This prevents any single user from monopolizing server resources and causing performance degradation or downtime for other users on the same server. This LVE technology is a key differentiator, ensuring a more stable and reliable hosting environment. CloudLinux OS also incorporates features like CageFS, a virtualized file system that encapsulates each user, preventing them from seeing each other's sensitive information or accessing server configuration files. This significantly enhances security in a multi-tenant setup. Furthermore, HardenedPHP ensures the security of the host system by automatically patching older and unsupported PHP versions. The OS is compatible with major control panels like cPanel, Plesk, and DirectAdmin, facilitating easier adoption and management for hosting providers. Beyond the operating system, CloudLinux has expanded its product portfolio with solutions like Imunify360, a comprehensive security suite for Linux web servers, and KernelCare, which provides automated, rebootless kernel patching. The company also initiated AlmaLinux OS, a free, open-source, community-driven enterprise-grade Linux distribution intended as a CentOS alternative, and continues to sponsor the AlmaLinux OS Foundation.

Employee benefits

Learn about the employee benefits and perks provided at CloudLinux.

View benefits

Competitive pay

CloudLinux offers competitive pay.

Paid vacation

Eligible staffers receive paid vacation.

Medical insurance

Eligible staffers receive medical insurance.

English sessions

CloudLinux offers English language sessions.

View CloudLinux's employee benefits
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CloudLinux

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CloudLinux hiring Middle AI Engineer - AI Patch Backporting (remote-only, Europe) • Remote (Work from Home) | Himalayas