London, UK On-site Employment

Cloudflare is hiring a Research Engineer Intern (Summer 2026)

Requirements

  • Evidence of tackling hard or open-ended problems
  • Proven track record of peer-reviewed research, open-source software contributions, or standards development, that is commensurate with level of training
  • Ability to work in a systems-level programming language (e.g. Rust, C, Go)
  • Passion for debugging and ensuring system reliability
  • Familiarity with continuous integration workflows and source control systems (e.g., Gitlab, Github)
  • Willing and eager to share knowledge, with the skills to do so
  • Ability to commit to a 12 week summer internship

Nice to Have

  • Knowledge or experience with at least one of the following: Computer networking protocols (TCP/IP, DNS, BGP, QUIC, etc.) and related algorithms
  • Machine learning analysis, ideally in systems or network optimization
  • Authentication protocols, applied cryptography, PKI and SSL/TLS
  • Operating or distributed systems analysis or development
  • Measurement for network and computer systems
  • Proficiency in a scripting language, such as Python
  • Proven track record of independently driving projects in a fast-paced environment
  • Experience working in groups, or with multiple stakeholders
  • Able to fluently work across multiple programming languages

Additional Information

  • In office 3-4 days a week in London, UK
  • Ability to commit to a 12 week summer internship
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About company
Cloudflare
Cloudflare runs one of the world’s largest networks that powers millions of websites and other Internet properties. It protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Its intelligent global network routes web traffic to improve performance and reduce spam and attacks. Cloudflare offers services ranging from enterprise security solutions to public tools like 1.1.1.1, a privacy-first DNS resolver.
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Job Details
Department Research Team
Category other
Posted 2 hours ago