Research Engineer Intern (Fall 2026)

Cloudflare's Research Team solves difficult problems in security, privacy, and systems at scale. This involves engineering, data analysis, open source software development, protocol design, implementation of primitives, with lots of measurement alongside.

Successful candidates will be matched to suitable projects in on-going research directions. We are particularly interested in applications in the following areas:

• AI
• Distributed Systems
• Privacy
• Trusted Execution Environments

General Research Intern 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
• Experience clearly communicating research ideas through papers, pre-prints, standards documents, blogs, or similar media
• 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

Additional Requirements:

• 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

Internship Availability and Expectations:

• Ability to commit to a 12 week fall internship
• In office 3-4 days a week in London, UK