Research Engineer Intern (Spring/Jan 2026) jobs in United States
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Cloudflare · 12 hours ago

Research Engineer Intern (Spring/Jan 2026)

positionAustin, TX
timeInternship
remoteOnsite
seniorityIntern
workcardStart in 2026 Winter

Cloudflare is on a mission to help build a better Internet and runs one of the world’s largest networks that powers millions of websites. They are seeking a Research Engineer Intern to solve difficult problems in security, privacy, and systems at scale, contributing to ongoing research projects and exploring novel proposals.

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H1B Sponsor Likelynote

Responsibilities

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
Available to intern and work
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
Ability to commit to a minimum 12 week summer internship starting in January 2026
In office 3-4 days a week in Austin, TX

Qualification

Systems-level programmingComputer networking protocolsApplied cryptographyMachine learning analysisScripting language proficiencyContinuous integration workflowsDebuggingResearch communicationProject management

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
Available to intern and work
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
Ability to commit to a minimum 12 week summer internship starting in January 2026
In office 3-4 days a week in Austin, TX

Company

Cloudflare

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Cloudflare is a web performance and security company that provides online services to protect and accelerate websites online.
dateFounded in 2009
location
San Francisco, California, USA
people-size1001-5000 employees
web-link
http://www.cloudflare.com

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 (117)
2024 (115)
2023 (66)
2022 (98)
2021 (83)
2020 (37)

Funding

Current Stage
Public Company
Total Funding
$2.08B
Key Investors
Franklin TempletonFidelityUnion Square Ventures
2025-06-13Post Ipo Debt· $1.75B
2019-09-12IPO
2019-03-12Series E· $150M

Leadership Team

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Matthew Prince
CEO & Co-Founder
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Lee Holloway
Co-Founder & Lead Engineer
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Recent News

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2025-12-29
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Company data provided by crunchbase