Security Engineer Intern (Fall 2026)

Cloudflare•San Francisco, CA

5d•Onsite

About The Position

Cloudflare is seeking a Security Engineer Intern for Fall 2026. This internship offers a unique opportunity to work alongside experienced security engineers to identify vulnerabilities, harden infrastructure, and build tools that protect billions of Internet users. The role involves working on security-focused projects, collaborating with cross-functional teams, and learning to defend systems at a massive scale. Interns will be mentored, build their professional network, and present their projects to the company. The internship is 12-16 weeks long and requires a commitment to being in the office 3-5 days a week.

Requirements

Currently pursuing a degree in Computer Science, Cybersecurity, Computer Engineering, or a related technical field.
A solid understanding of the OWASP Top 10, common attack vectors (XSS, SQLi, CSRF), and how to mitigate them.
Familiarity with using AI tools to streamline tasks and increase efficiency.
Demonstrated critical thinking skills and drive to learn and adapt new technologies.
Curiosity, empathy and ability to get things done.
Ability to commit to a minimum 12 week summer internship.
In office 3-5 days a week in the location of the internship.
Local to Austin; relocation not provided.

Nice To Haves

Demonstrated passion for security & software development, such as personal projects, open-source contributions, or experience with our developer platform using Cloudflare for Students.

Responsibilities

Ship and deliver security-focused projects over 12-16 weeks with autonomy and support.
Work cross-functionally with Product, Infrastructure, and Engineering teams to integrate security into every stage of the development lifecycle.
Work closely with a mentor to guide you through the internship, develop your security expertise, and help with career goals.
Build your network across the company through our various in and out of office socials, networking programs, Employee Resource Group (ERG) programs, and Activity Groups.
Present your security project to the entire company at the end of the internship.
Connect and learn from our executives and leadership team including our co-founders.
Write for our Cloudflare blog (e.g., documenting a new security tool or a vulnerability research finding) and be featured on Cloudflare.tv sessions.