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Cloudflare

Application Security Fullstack Engineer

On site

San francisco, United states

Junior

Full Time

29-12-2025

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Skills

JavaScript TypeScript GraphQL Networking react JavaScript/TypeScript Redux

Job Specifications

About Us
At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world's largest networks that powers millions of websites and other 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! Location
London/Lisbon What you'll do
We're looking to expand the team building our AI Agent, Cloudy. We're looking for someone who is experienced (or at least interested in getting up to speed quickly) with technologies powering AI agents, and integrating them with Cloudflare's products and services. Cloudflare has a robust AI tooling offering like AI Gateway, Workers AI, workflows and others. You must also have a strong background in building the entirety of an application, from the user interface to the apis powering it.
We believe that great design is at the heart of any successful product. You will work closely with our design/UX team and must be comfortable seeking feedback from non-technical sources. We work iteratively and deploy often (can be several times a day). We build and maintain the Cloudflare Dashboard, a large TypeScript/React application, maintain a suite of common components published on npm, and build/package with Webpack. Other technologies we use include Redux, Fela, GraphQL, Apollo, Jest, Enzyme, Cypress, D3 and more. Desirable skills, knowledge and experience
Minimum of 2 years experience building product
Strong fullstack engineering experience, with a bias towards Javascript/Typescript
Experience with building llm-powered applications and/or AI agents
Track record of building great interfaces and being detail oriented
Ability to work in cross-functional teams
Willingness to dive deep and understand product internals
Excellent debugging skills
Unit/integration testing experience Bonus Points
Familiarity with the Cloudflare Developer Platform (extra bonus points for Agents Library)
Experience working alongside user researchers to build products
History of building products in complex systems
Knowledge of the broader Internet technologies (DNS, networking, etc) 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
Since 2014, we've equipped more than 2,400 journalism and civil society organizations in 111 countries 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
In 2017, we created the 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. Since the project, we've provided services to more than 425 local government election websites in 33 states. 1.1.1.1
We released 1.1.1.1 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

About the Company

Cloudflare, Inc. (NYSE: NET) is the leading connectivity cloud company. 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, Cloudfla... Know more