Software Engineer Intern (Summer 2025)

Posted 8 Days Ago
Be an Early Applicant
Lisbon
Hybrid
Internship
Cloud • Information Technology • Security • Software • Cybersecurity
Helping Build a Better Internet
The Role
As a Software Engineer Intern at Cloudflare, you will engage in projects that improve Internet functionality, work collaboratively across teams, be mentored by experienced engineers, and gain exposure to the company's leadership. You are expected to present your final project and participate in professional development workshops throughout the internship.
Summary Generated by Built In

Available location: Lisbon, Portugal
About Cloudflare's Engineering teams
Anytime we push code, it automatically affects the millions of Internet properties (powering websites, remote teams, APIs, mobile apps, etc.) running on our global network. Cloudflare's network is one of the largest in the world and spans over 300 cities in more than 100 countries. What's more, Cloudflare operates within 50 milliseconds of 95% of the Internet-connected population globally (for context, the blink of an eye is 300-400 milliseconds!). We are passionate about making the Internet more secure, reliable, and faster for everyone.
Cloudflare's Engineering teams build and run the software that handles the massive amount of traffic that flows through our network. We also have teams that build the UI and control plane for our software, using modern patterns and libraries in a microservices-based architecture. Technologies include: C/C++, Rust, Go, Lua, Nginx, Go, Python, Typescript, JavaScript and ReactJS.
About the Internship Program
The ideal summer intern is passionate about making the Internet a better place. You will work with strong engineers. You will push code this summer that touches hundreds of millions of web surfers. We like to get things done, so we are looking for interns who are curious and can take on and complete projects. This is a great opportunity for engineers that want to learn to develop at Internet scale.
What would you do as a Cloudflare intern?

  • Ship and deliver projects over 12-16 weeks with autonomy and support.
  • Work cross-functionally with various teams.
  • Be assigned a mentor to guide you through the internship and help with career goals.
  • Build your network across the company through our various in and out of office socials, networking programs, Employee Resource Group (ERG) programs, and Activity Groups (Cat or dog lovers, we've got communities for you! @Catflare @Doggos).
  • Present your project to the entire company at the end of the internship.
  • Get direct access to our executives and leadership team including our co-founders.
  • Learn and develop skills through our professional development workshops.
  • Write for our Cloudflare blog and be featured on Cloudflare.tv sessions.
  • Receive Cloudflare swag and free Cloudflare products!


You can check out our internship blogs to learn more about our program and hear directly from our past interns.
Examples of desirable skills, knowledge and experience

  • Currently pursuing a degree or program in Computer Science, Engineering, Mathematics, Statistics or relevant field to the role.
  • Demonstrated critical thinking skills and drive to learn and adapt new technologies.
  • Curiosity, empathy and ability to get things done.
  • Ability to commit to a 12 week summer internship.
  • In office 3 days a week in Lisbon, Portugal.


Please note

  • We will be hiring interns through the fall and early spring on a rolling basis until all roles are complete.

Top Skills

C,C++,Rust,Go,Lua,Python,Typescript,Javascript,Reactjs
The Company
HQ: San Francisco, CA
3,900 Employees
Hybrid Workplace
Year Founded: 2010

What We Do

Cloudflare, Inc. (NYSE: NET) is the leading connectivity cloud company on a mission to help build a better Internet. It empowers organizations to make their employees, applications and networks faster and more secure everywhere, while reducing complexity and cost. Cloudflare’s connectivity cloud delivers the most full-featured, unified platform of cloud-native products and developer tools, so any organization can gain the control they need to work, develop, and accelerate their business.

Powered by one of the world’s largest and most interconnected networks, Cloudflare blocks billions of threats online for its customers every day. It is trusted by millions of organizations – from the largest brands to entrepreneurs and small businesses to nonprofits, humanitarian groups, and governments across the globe.

Why Work With Us

Cloudflare employees come from all walks of life. We are mission-driven, and our team is energized by a collaborative, creative environment that celebrates our differences and fosters new ways to grow together.

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Cloudflare Offices

Hybrid Workspace

Employees engage in a combination of remote and on-site work.

We are committed to developing a global team that is distributed with a flexible working approach. Doing this equitably and inclusively is essential to our success. Visit our careers site for more on 'How & Where We Work.'

Typical time on-site: Flexible
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