Security Systems Reliability Engineering Manager

Confirmed live in the last 24 hours

Cloudflare

Hybrid

Posted February 18, 2026

Job Description

About Us

At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world’s largest networks that powers millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company.

At Cloudflare, we’re not looking for people who wait for a polished roadmap; we’re looking for the builders who see the cracks in the Internet that everyone else has simply learned to live with. We value candidates who have the instinct to spot a "normalized" problem and the AI-native curiosity to create a solution using the latest tools. Our culture is built on iteration, leveraging AI to ship faster today to make it better tomorrow, while ensuring that every improvement, no matter how small, is shared across the team to lift everyone up. If you’re the type of person who values curiosity over bureaucracy, and that AI is a partner in solving tough problems to keep the Internet moving forward, you’ll fit right in.

Available Location

Lisbon, Portugal

About the Department

The Security team at Cloudflare is focused and committed to helping secure both Cloudflare and our customers. The Security Systems Reliability Engineering team supports tooling and infrastructure across the Security team.

About the Role

As a Security Systems Reliability Engineer, you will play a key role in designing, implementing, managing, and supporting infrastructure and security technologies. You will be responsible for ensuring systems are secure, highly available, fault tolerant, and scale to meet business needs.

Work may include documenting new standard operating procedures, ensuring vendor recommended security baseline configurations are implemented, designing repeatable deployment patterns, performing disaster recovery testing, performing chaos testing, configuring new integrations, implementing new technologies, patching applications and operating systems, performing upgrades and other maintenance tasks, establishing integrations, documenting the as-built architecture, establishing monitoring and logging, and participating in investigations and service restorations.

As manager of the team, you will be expected to:

Design, implement, and maintain secure infrastructure across various environments (non-production and production).
Ensure resilient and secure designs are implemented and maintained.
Drive continuous improvement while maintaining multiple environments.
Ensure systems meet performance expectations.
Engage in proactive risk management and incident response planning.
Develop or utilize automation to streamline repeatable tasks.
Ensure company data is managed in a secure and scalable manner.
Contribute to the creation and dissemination of knowledge about the designs within the company.

Examples of desirable skills, knowledge and experience

Security Systems Reliability Engineers take part in a wide variety of tasks and projects in the team. One individual is not expected to know everything, but a working knowledge in several of the following areas is required:

Bachelor's degree in Computer Science, Information Systems, Cybersecurity, related technical field, or equivalent practical experience
Experience performing the functions of a Site Reliability Engineer (SRE).
Ability to clearly communicate complex security requirements to stakeholders at all levels
Ability to navigate ambiguity, and provide clarity to complex situations
Extensive experience with deploying and administering Kubernetes in an enterprise environment.
Extensive experience developing and utilizing Terraform