Principal Systems Engineer, FL

Overview

Cloudflare is on a mission to help build a better Internet. The company runs one of the world’s largest networks that powers millions of websites and other Internet properties. Cloudflare protects and accelerates Internet applications without requiring hardware, software installation, or code changes. The network routes web traffic through Cloudflare’s global infrastructure, improving performance and reducing spam and attacks. Cloudflare has been recognized on Entrepreneur Magazine’s Top Company Cultures list and Fast Company’s Most Innovative Companies list.

We hire curious and empathetic individuals who are committed to developing themselves and learning new skills, and we are ready to help you do that. We cannot complete our mission without a diverse and inclusive team. We hire the best people based on potential and support them throughout their time at Cloudflare. Available Locations: London or Lisbon.

Cloudflare\'s Front Line (FL) group operates the world\'s largest web server, processing over 120 million HTTP requests per second. We are the guardians of Cloudflare\'s core infrastructure. As part of the Platform team, you will help evolve this system. We are a team of senior engineers and architects building and maintaining a web proxy platform that is not only performant but also offers exceptional developer ergonomics for over 20 other teams. The entire codebase is written in Rust.

As a Senior Engineer/Architect on the Platform team, you will be instrumental in building the next generation of Cloudflare\'s core web server. This role involves innovating and building a platform that empowers teams across the company. You will coordinate efforts across multiple teams to design, build, and deploy new features that enhance the availability, safety, and reliability of our edge network. This is a unique opportunity to influence how millions of people experience the Internet.

Your primary focus will be on building a high-performance platform with a focus on operational excellence, including defining and implementing clear Service Level Objectives (SLOs), monitoring key metrics, and managing error rates to ensure a robust and reliable system.

We are looking for seasoned professionals with a strong background in software architecture and distributed systems.

• Deep expertise in Rust , with a history of building complex, production-grade applications.
• Strong competencies in computer science , including knowledge of algorithms, data structures, and concurrency control.
• Experience with performance engineering and a proven track record of optimizing high-throughput, low-latency systems.
• Excellent communication and collaboration skills to drive consensus and coordinate with diverse engineering teams.
• A passion for continuous improvement in both operations and product development.

Bonus Points

• A deep understanding of web protocols and web servers .
• Experience with distributed systems architecture .
• Knowledge of web security issues and industry standards.
• Familiarity with Prometheus for monitoring and alerting.

Most importantly, we\'re seeking a builder—someone who is excited by the challenge of working on a system at scale. Join us in our mission to build a better Internet for everyone

We\'re not just a highly ambitious, large-scale technology company. We value a soulful, ambitious culture. Our mission to help build a better Internet includes protecting the free and open Internet.

Projects and initiatives include:

• Project Galileo : Since 2014, we\'ve equipped more than 2,400 journalism and civil society organizations in 111 countries with tools to defend against censorship, used by Cloudflare\'s enterprise customers at no cost.
• Athenian Project : In 2017, we created the Athenian Project to ensure state and local governments have protection and reliability for free, supporting election information and voter registration. We\'ve provided services to more than 425 local government election websites in 33 states.
• 1.1.1.1 : We released 1.1.1.1 to provide a faster, more secure and privacy-centric DNS resolver. It is publicly available and we do not store client IP addresses.

Sound like something you’d like to be a part of? We\'d love to hear from you

This position may require access to information protected under U.S. export control laws. Any offer of employment may be conditioned on authorization to receive software or technology controlled under U.S. export laws without sponsorship for an export license.

Cloudflare is proud to be an equal opportunity employer. We are committed to equal employment opportunity for all people and value diversity and inclusiveness. All qualified applicants will be considered without regard to race, color, religion, sex, gender, gender identity, gender expression, sexual orientation, national origin, ancestry, citizenship, age, disability, medical condition, or any other protected status. We are an AA/Veterans/Disabled Employer.

Cloudflare provides reasonable accommodations to qualified individuals with disabilities. If you require accommodations to apply, please contact us via email or mail as listed.