Overview

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 …

Responsibilities:
  • Optimizing web performance - developing and implementing solutions to improve web server performance, request handling, and overall system efficiency, using benchmarking and measurements to validate improvements.
  • Working with web servers - configuring, optimizing, and extending Nginx, Apache, and LiteSpeed, including developing modules and extensions.
  • Optimizing PHP handlers and web request processing - analyzing and enhancing the performance of different PHP handlers and data transfer mechanisms for processing incoming web requests.
  • Architecting web infrastructure - designing scalable, high-performance web systems and infrastructure solutions.
  • Ensuring web security - implementing security measures to protect against web attacks and strengthen web server security in production environments.
  • Database optimization - working with MySQL and MariaDB to optimize queries, improve performance, and ensure reliable database administration for web applications.
  • Supporting and optimizing database solutions - working on database optimization, performance tuning, and reliability improvements.
  • Supporting and optimizing PHP solutions - working on PHP handler optimization, performance improvements, and PHP-related infrastructure.
  • Maintaining and enhancing LVE (Lightweight Virtual Environment) - working on resource limits, CPU throttling, memory limits, I/O limits, and other LVE-related features.
  • Maintaining and enhancing MySQL Governor - working on database resource limitation and optimization.
  • Maintaining and enhancing CageFS - working on file system isolation, user isolation mechanisms, and security boundaries.
  • Developing new features for Limits - designing and implementing new resource limiting mechanisms and improvements to existing limit systems.
  • Developing new features for Isolations - creating new isolation technologies and enhancing existing isolation mechanisms for better security and performance.
  • Architecting system-level solutions - designing scalable, high-performance system-level solutions for resource management and isolation.
  • Working with system internals - deep involvement with Linux system calls and low-level system programming.
Required Qualifications:
  • 6+ years of professional software engineering experience in C;
  • Held senior/staff/principal engineering positions in previous roles;
  • Strong C development skills - expert-level proficiency in C programming, essential for both web server extensions and kernel/system-level work;
  • Web performance expertise - participation in web performance projects or own solutions for optimizing web performance;
  • Web server experience - deep knowledge and experience with Nginx, Apache, and/or LiteSpeed, including developing C modules and extensions;
  • Experience with PHP handlers and web request processing optimization;
  • System programming expertise - deep experience with system-level programming and low-level system optimization;
  • Linux kernel knowledge - understanding of Linux kernel internals, system calls, and system-level programming concepts;
  • Resource management experience - resource limits, cgroups, namespaces, or similar resource management and isolation technologies;
  • Strong Linux proficiency - comprehensive understanding of Linux system administration, internals, kernel architecture, and optimization;
  • High level of security knowledge - strong understanding of security basics for web attacks, isolation mechanisms, and Linux security in general;
  • Database expertise - solid experience with MySQL and MariaDB, including optimization and administration;
  • Data-driven approach - proven ability to use benchmarking and measurements to validate and prove any technical decisions;
  • Contribution to public/upstream solutions - experience contributing to open-source projects or upstream codebases;
  • Experience developing new Apache/Nginx/MySQL/PHP modules/plugins and contributing to open-source existing ones;
  • Strong understanding of the network stack, particularly TCP/IP and HTTP;
  • Architecture and design skills - ability to design systems that are scalable, maintainable, and reliable at both web infrastructure and system levels;
  • Technical leadership experience - mentoring engineers, conducting technical reviews, and driving engineering best practices;
  • Knowledge of CI/CD pipelines and DevOps practices;
  • Excellent communication skills - ability to articulate complex technical concepts to both technical and non-technical audiences;
  • Strong collaboration skills and ability to work effectively in a remote, distributed team environment;
  • Experience with POSIX programming in C;
  • Experience with thread programming in C;
  • Hands-on experience with profiling tools like perf, gprof, valgrind, etc.;
  • English at an upper-intermediate level or higher.
  • Product and architectural visionary - ability to see the big picture and drive product direction through technical excellence.
  • Game changer - can take initiative and make proposals that change solutions and technical direction.
  • Universal engineer - versatile and adaptable, comfortable working across different domains and technologies.
  • High initiative - proactive in identifying opportunities and driving improvements.
  • High performance - consistently delivers exceptional results and exceeds expectations.
  • Advanced algorithmic optimization - ability to design and implement alternative, more efficient algorithmic approaches to solve complex technical problems.
  • Adept at using AI - leverages modern AI tools and techniques to enhance productivity and solutions.
  • Results-driven and goal-oriented - focused on delivering measurable impact and achieving strategic objectives.
Benefits:
  • A focus on professional development.
  • Interesting and challenging projects.
  • Fully remote work with flexible working hours, which 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.
  • Compensation for private medical insurance.
  • Co-working and gym/sports reimbursement.
  • Budget for education.
  • The opportunity to receive a reward for the most innovative idea that the company can patent.
Note:

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