Security Systems Reliability Engineer

Sorry, this job was removed at 10:20 p.m. (CST) on Tuesday, Sep 23, 2025
Be an Early Applicant
Lisbon
Hybrid
Cloud • Information Technology • Security • Software • Cybersecurity
Helping Build a Better Internet
The Role
Available Location
Lisbon, Portugal
Job Title
Security Systems Reliability Engineer
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 part of our 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 to deploy and update environments through infrastructure as code (IaC).
  • Extensive experience with deploying and administering Linux systems in an enterprise environment.
  • Extensive experience deploying and administering enterprise solutions in GCP, AWS or Azure.
  • Experience implementing, integrating, and supporting application security tools within a CI/CD pipeline environment.
  • Solid understanding of reliability engineering principles and a commitment to continuous improvement.
  • Experience writing scripts, leveraging automation, and creating infrastructure as code to streamline processes.
  • Advanced programming experience (Python, Golang, Bash, etc.)
  • Strong analytical skills focused on service availability with curiosity and thoroughness in problem-solving.
  • Ability to navigate ambiguity, bring clarity to complex situations, and collaborate effectively with various stakeholders.
  • Experience working with different security functions as part of a wider team

Bonus Points
  • Strong Linux system experience from user-space to kernel-space
  • Cross-functional governance experience with programs like PCI-DSS, FedRAMP
  • Proficient in managing Application Security related technologies like Veracode, Checkmarx, SonarQube, Snyk, Semgrep, Fortify, or Coverity integrated into CI/CD pipelines.
  • Experience with deploying and administering Cloudflare products (access, tunnels, waf)
  • Experience working with large data platforms
  • Experience working with data classification schemas at scale
  • Experience working with organization wide business ecosystems (Google, Microsoft)

Similar Jobs

Cloudflare Logo Cloudflare

VP, Developer Adoption

Cloud • Information Technology • Security • Software • Cybersecurity
Hybrid
5 Locations
4400 Employees
260K-365K Annually

Cloudflare Logo Cloudflare

Business Development Representative

Cloud • Information Technology • Security • Software • Cybersecurity
Hybrid
2 Locations
4400 Employees

Cloudflare Logo Cloudflare

Research Engineer Intern (Summer 2026)

Cloud • Information Technology • Security • Software • Cybersecurity
Hybrid
Lisbon, PRT
4400 Employees

Cloudflare Logo Cloudflare

Senior Product Manager

Cloud • Information Technology • Security • Software • Cybersecurity
Hybrid
3 Locations
4400 Employees
Get Personalized Job Insights.
Our AI-powered fit analysis compares your resume with a job listing so you know if your skills & experience align.

The Company
HQ: San Francisco, CA
4,400 Employees
Year Founded: 2010

What We Do

Cloudflare, Inc. (NYSE: NET) is the leading connectivity cloud company on a mission to help build a better Internet. It empowers organizations to make their employees, applications and networks faster and more secure everywhere, while reducing complexity and cost. Cloudflare’s connectivity cloud delivers the most full-featured, unified platform of cloud-native products and developer tools, so any organization can gain the control they need to work, develop, and accelerate their business.

Powered by one of the world’s largest and most interconnected networks, Cloudflare blocks billions of threats online for its customers every day. It is trusted by millions of organizations – from the largest brands to entrepreneurs and small businesses to nonprofits, humanitarian groups, and governments across the globe.

Why Work With Us

Cloudflare employees come from all walks of life. We are mission-driven, and our team is energized by a collaborative, creative environment that celebrates our differences and fosters new ways to grow together.

Gallery

Gallery
Gallery
Gallery
Gallery
Gallery
Gallery
Gallery
Gallery
Gallery

Cloudflare Offices

Hybrid Workspace

Employees engage in a combination of remote and on-site work.

We are committed to developing a global team that is distributed with a flexible working approach. Doing this equitably and inclusively is essential to our success. Visit our careers site for more on 'How & Where We Work.'

Typical time on-site: Flexible
HQSan Francisco, CA
IL
DC
Singapore
Austin, TX
Bengaluru, Karnataka
Boston, MA
Denver, Colorado
Lisbon, PT
London, GB
Los Angeles, CA
New York, NY
Seattle, WA
Learn more

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account