PhD Research/Software Engineer Intern, Bot and Fraud Detection (Summer 2024)

Remote London, UK
Rust Kafka Kubernetes PostgreSQL Docker SQL Machine Learning Python
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About Us

At Cloudflare, we have our eyes set on an ambitious goal: to help build a better Internet. Today the company runs one of the world’s largest networks that powers approximately 25 million Internet properties, for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company. 

We realize people do not fit into neat boxes. We are looking for curious and empathetic individuals who are committed to developing themselves and learning new skills, and we are ready to help you do that. We cannot complete our mission without building a diverse and inclusive team. We hire the best people based on an evaluation of their potential and support them throughout their time at Cloudflare. Come join us! 

Available Locations: Austin, Remote US, London, Remote UK

About the Team

At Cloudflare, our engineering and research team combines the expertise of some of the industry’s most talented professionals in both software engineering and advanced research. Our Bot and Fraud Detection Research and Development team focuses on innovating and developing leading-edge solutions to combat online fraud and bot activities, thereby ensuring the highest levels of security and integrity for online platforms. Collaborating closely with product development and engineering groups, our researchers play a crucial role in advancing our fraud detection products through identification of new signals and refining our bot detection algorithms.

What You'll Do

During the 12-16 weeks of internship, as a researcher intern in our bot and fraud detection team, you will do one or more of the following:

  • Engage in cutting-edge research to design, develop, and enhance our fraud detection products;
  • Apply your knowledge in data science and machine learning to analyze and interpret vast datasets, contributing to the fight against sophisticated online attackers;
  • Collaborate with cross-functional teams to integrate research findings into practical, scalable solutions;
  • Utilize and improve upon our technology stack, which includes Python, Rust, Kafka, Kubernetes, PostgreSQL, and Clickhouse;
  • Make significant contributions to the field of bot and fraud detection, impacting the security of online applications globally.

What Are We Looking For?

  • Current full-time Ph.D. candidate in the fields of Computer Science, Data Science, or Cybersecurity.
  • Proven track record of research in academia or industry, preferably in areas related to cybersecurity, bot detection, browser fingerprinting, fraud detection, or machine learning.
  • Expertise in web security, network protocols, and web application architectures.
  • Demonstrated ability to work with large-scale datasets and distributed computing.

Bonus points

  • Experience in developing and implementing bot detection and fraud prevention strategies.
  • Publication record in peer-reviewed venues or industry conferences in relevant fields.
  • Familiarity with cloud computing environments and big data technologies.
  • Experience with productionizing machine learning models.
  • Experience with technologies such as Docker, Kubernetes, Salt.
  • Familiarity with writing and optimizing advanced SQL queries.
  • Experience with columnar databases such as Clickhouse.

What Makes Cloudflare Special?

We’re not just a highly ambitious, large-scale technology company. We’re a highly ambitious, large-scale technology company with a soul. Fundamental to our mission to help build a better Internet is protecting the free and open Internet.

Project Galileo: We equip politically and artistically important organizations and journalists with powerful tools to defend themselves against attacks that would otherwise censor their work, technology already used by Cloudflare’s enterprise customers--at no cost.

Athenian Project: We created Athenian Project to ensure that state and local governments have the highest level of protection and reliability for free, so that their constituents have access to election information and voter registration.

Path Forward Partnership: Since 2016, we have partnered with Path Forward, a nonprofit organization, to create 16-week positions for mid-career professionals who want to get back to the workplace after taking time off to care for a child, parent, or loved one. We released to help fix the foundation of the Internet by building a faster, more secure and privacy-centric public DNS resolver. This is available publicly for everyone to use - it is the first consumer-focused service Cloudflare has ever released. Here’s the deal - we don’t store client IP addresses never, ever. We will continue to abide by our privacy commitment and ensure that no user data is sold to advertisers or used to target consumers.

Sound like something you’d like to be a part of? We’d love to hear from you!

This position may require access to information protected under U.S. export control laws, including the U.S. Export Administration Regulations. Please note that any offer of employment may be conditioned on your authorization to receive software or technology controlled under these U.S. export laws without sponsorship for an export license.

Cloudflare is proud to be an equal opportunity employer.  We are committed to providing equal employment opportunity for all people and place great value in both diversity and inclusiveness.  All qualified applicants will be considered for employment without regard to their, or any other person's, perceived or actual race, color, religion, sex, gender, gender identity, gender expression, sexual orientation, national origin, ancestry, citizenship, age, physical or mental disability, medical condition, family care status, or any other basis protected by law. We are an AA/Veterans/Disabled Employer.

Cloudflare provides reasonable accommodations to qualified individuals with disabilities.  Please tell us if you require a reasonable accommodation to apply for a job. Examples of reasonable accommodations include, but are not limited to, changing the application process, providing documents in an alternate format, using a sign language interpreter, or using specialized equipment.  If you require a reasonable accommodation to apply for a job, please contact us via e-mail at or via mail at 101 Townsend St. San Francisco, CA 94107.

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