Security Engineer Intern (Summer 2026) at Cloudflare in Austin, TX

Summary: Cloudflare is on a mission to help build a better Internet and is seeking a Security Engineer Intern for Summer 2026. The intern will work alongside experienced security engineers to identify vulnerabilities, harden infrastructure, and build tools that protect billions of Internet users. 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 Required Qualifications: - 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 - 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 Preferred Qualifications: - Demonstrated passion for security & software development, such as personal projects, open-source contributions, or experience with our developer platform using Cloudflare for Students Required Skills: Security fundamentals, OWASP Top 10, XSS, SQL injection, CSRF, Software development, Curiosity, Empathy Internship Start Date: Start in 2026 Summer