Senior​/Python Engineer - CloudLinuxOS Optimization & Web ; Remote​/ago

Senior/Staff Python Engineer (Remote) - Linux Infrastructure & Web Optimization

Cloud Linux is a global, remote‑first company dedicated to delivering high‑volume, low‑cost Linux infrastructure and security products that significantly increase operational efficiency. Our core principles emphasize doing the right thing and prioritizing our employees.

Our flagship product, Cloud

Linux

OS, powers over 80,000 production servers and 50 million websites, recognized for superior security and efficiency in shared hosting environments. Cloud

Linux

OS reduces operating costs and increases profitability by enhancing server density and security. Learn more:

We are seeking a talented Senior/Staff Python Developer to join our engineering team. This role involves providing technical leadership while optimizing both web infrastructure and core Cloud Linux features related to resource limitation (LVE - Lightweight Virtual Environment, MySQL Governor) and file system isolation (CageFS).

• Product and Architectural Visionary: Ability to define product direction through technical excellence.
• Game Changer: Proactive initiative to propose and implement transformative technical solutions.
• Universal Engineer: Versatile and adaptable across diverse domains and technologies.
• High Initiative & Performance: Consistently delivering exceptional results and driving improvements.
• Advanced Algorithmic Optimization: Designing and implementing highly efficient algorithmic approaches for complex technical challenges.
• Adept at using AI: Leveraging modern AI tools to enhance productivity and solutions.
• Results-Driven: Focused on achieving strategic objectives and measurable impact.

• Develop and implement solutions to improve web server performance, request handling, and overall system efficiency, validating improvements using benchmarking.
• Configure, optimize, and extend web servers including Nginx, Apache, and Lite Speed
  .
• Analyze and enhance the performance of PHP handlers and data transfer mechanisms for web request processing.
• Design scalable, high‑performance web systems and infrastructure solutions.
• Implement robust security measures to protect against web attacks and strengthen web server security in production.
• Optimize MySQL and MariaDB queries, improve database performance, and ensure reliable administration for web applications.

• Maintain and enhance LVE (Lightweight Virtual Environment), focusing on resource limits, CPU throttling, memory limits, and I/O limits.
• Maintain and enhance MySQL Governor for database resource limitation and optimization.
• Maintain and enhance CageFS
  , focusing on file system isolation, user isolation mechanisms, and security boundaries.
• Design and implement new resource limiting mechanisms and isolation technologies for improved security and performance.
• Architect scalable, high‑performance system‑level solutions for resource management and isolation.
• Work deeply with Linux system internals
  , including system calls and system‑level programming.

• Lead technical initiatives and propose changes to solutions and technical direction across web and core features.
• Optimize system performance through profiling, benchmarking, and algorithmic optimization.
• Ensure all technical decisions are data‑driven, validated by concrete measurements and profiling.
• Actively contribute improvements to open‑source projects and upstream codebases
  .
• Leverage modern AI tools and techniques to enhance productivity and optimization solutions.
• Mentor and coach engineers, conduct technical reviews, and establish engineering best practices.
• Collaborate with cross‑functional teams on technical strategy and roadmaps.
• Troubleshoot complex production issues related to web performance, limits, isolations, and system functionality, implementing long‑term fixes.

• 6+ years of professional software engineering experience in Python
  .
• Previous experience holding senior, staff, or principal engineering positions.
• Expert‑level proficiency in Python programming for web optimization, tooling, automation, and system‑level tasks.
• Pr…