As a Security Engineering intern at Cloudflare in London, UK, you will join the Cyber Defense & Engineering or CloudforceOne Threat Intelligence & Research teams under the Chief Security Officer, working on projects that enhance security for millions of Internet properties. Your day-to-day responsibilities include identifying vulnerabilities, hardening infrastructure, and building tools to protect billions of users. You’ll use technologies like Go, Rust, Python, and C/C++ while collaborating with Product, Infrastructure, and Engineering teams to integrate security into every stage of development. This internship offers the chance to work closely with a mentor, present your project to the entire company, and connect with executives, fostering both technical expertise and professional growth in a high-scale environment.
Skills
Go
Rust
Python
C/C++
OWASP Top 10
XSS
SQLi
CSRF
CI/CD
What you'll do
Identify and mitigate vulnerabilities in Cloudflare's infrastructure.
Build security tools that protect billions of Internet users.
Integrate security into every stage of the development lifecycle.
Work autonomously on security-focused projects over 12-16 weeks.
Present a security project to the entire company at internship end.
Write for the Cloudflare blog about new security tools or research findings.
What we're looking for
Currently pursuing a degree in Computer Science, Cybersecurity, or related technical field.
Solid understanding of OWASP Top 10 and common attack vectors like XSS, SQLi, CSRF.
Strong critical thinking skills with a drive to learn new technologies.
Proactive approach and ability to work autonomously on security projects.
Experience working cross-functionally in development lifecycle integration.
Local to London; relocation not provided for internship.
Market check
Salary context
This listing doesn't show a salary. Similar roles on FindRole typically pay
$124,000–$225,000.
Peer median band
$124,000–$225,000
Median floor and ceiling across peers.
Typical midpoint (25–75%)
$142,450–$224,062
Middle half of comparable postings.
Based on 240 comparable postings.*
* 240 is the maximum number of comparable postings sampled.
Employer
About Cloudflare, Inc
Cloudflare is a prominent cloud services and security company that provides content delivery network (CDN), DDoS mitigation, and Zero Trust security services to millions of internet properties.
Cloudflare, Inc currently has
102 open roles
on FindRole.
Listed pay typically runs
$234,000–$321,000
across 40 roles with salary data.