Cloudflare · 4 hours ago
Research Engineer Intern (Summer 2026)
Austin, TX
Internship
Onsite
Intern
Start in 2026 SummerCloudflare is on a mission to help build a better Internet, running one of the world’s largest networks that powers millions of websites. The Research Engineer Intern will work with the Research Team to solve complex problems related to security, privacy, and systems at scale, contributing to ongoing research projects and proposing new ideas.
AnalyticsEnterprise SoftwareSecurityWeb Hosting
Responsibilities
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 also welcome novel proposals and ideas that can help to inform or build a better Internet (in the form of a max 200 word proposal)
The Internet is evolving in ways that challenge convention, and many existing assumptions no longer hold
Interns and internship projects are designed to help maintain the integrity of the Internet, its systems, and its applications
Some of the fundamental areas we’re investigating focus on include advanced cryptography, hardware isolation, balancing user privacy against notions of identity, network and internetwork observability in a seemingly fragmented world, even applications of formal methods at scale — and this is just a small view into our work!
We’re also acutely aware that AI will impact all layers of a globally distributed system and the wider Internet
Qualification
Required
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 --- students at all levels are welcome to apply
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
Knowledge or experience with at least one of the following: Computer networking protocols (TCP/IP, DNS, BGP, QUIC, etc.) and related algorithms
Knowledge or experience with at least one of the following: Machine learning analysis, ideally in systems or network optimization
Knowledge or experience with at least one of the following: Authentication protocols, applied cryptography, PKI and SSL/TLS
Knowledge or experience with at least one of the following: Operating or distributed systems analysis or development
Knowledge or experience with at least one of the following: Measurement for network and computer systems
Knowledge or experience with at least one of the following: Proficiency in a scripting language, such as Python
Preferred
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
Company
Cloudflare
Cloudflare is a web performance and security company that provides online services to protect and accelerate websites online.
Founded in 2009
1001-5000 employees
H1B Sponsorship
Cloudflare has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (91)
2024 (116)
2023 (67)
2022 (98)
2021 (83)
2020 (37)
Funding
Current Stage
Public CompanyTotal Funding
$2.08BKey Investors
Franklin TempletonFidelityUnion Square Ventures
2025-06-13Post Ipo Debt· $1.75B
2019-09-12IPO
2019-03-12Series E· $150M
Leadership Team
Matthew Prince
CEO & Co-Founder
Lee Holloway
Co-Founder & Lead Engineer
Recent News
torrentfreak.com
2025-12-29
2025-12-29
2025-12-24
Company data provided by crunchbase