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. At Cloudflare, we’re not looking for people who wait for a polished roadmap; we’re looking for the builders who see the cracks in the Internet that everyone else has simply learned to live with. We value candidates who have the instinct to spot a "normalized" problem and the AI-native curiosity to create a solution using the latest tools. Our culture is built on iteration, leveraging AI to ship faster today to make it better tomorrow, while ensuring that every improvement, no matter how small, is shared across the team to lift everyone up. If you’re the type of person who values curiosity over bureaucracy, and that AI is a partner in solving tough problems to keep the Internet moving forward, you’ll fit right in.

Available locations: Amsterdam, Netherlands, Brussels, Belgium, Lisbon, Portugal, London, UK, Munich, Germany, Paris, France, Sweden, Switzerland. This role requires two days in office, it is not a fully remote role.

About The Team

Application Security is responsible for Cloudflare’s fast-growing security product portfolio including WAF, Page Shield, Web Asset Management and API Shield. Being part of Cloudflare means working at internet scale and we are uniquely positioned to tackle challenging problems related to being connected to more networks, websites and customers than any other provider worldwide. Working at great scale by default (to an extent not offered by most other employers in big tech) means pushing boundaries well beyond what commodity solutions like Nginx and Kafka provide out of the box. You’ll be working with custom components that have been created in an engineering-driven and pragmatic way - our code is well-tested and documented and uses modern ecosystems like Go and Rust. This gives you confidence that you will spend your time having an impact and not firefighting! You’d be joining a high-profile part of the business that can really accelerate and support your career. Cloudflare has a strong track record of growing in a thoughtful way and hires carefully so we’re confident that you will enjoy working with your colleagues here!

About You

You must have at least 5 years of professional experience working hands-on as a software developer . We require proficiency with at least one of Go or Rust, plus exposure to devops tooling like but not limited to Kubernetes, Salt, Kafka or Systemd. Strong Linux / Unix fundamentals will be very helpful. You must have experience working with distributed systems at scale. Experience with cyber security is preferred but not essential. Cloudflare’s culture is busy and multifaceted, and people who succeed here are persistent, have a can-do attitude and a genuine willingness to assume good faith in others. This last quality in particular requires them to be empathetic and emotionally intelligent, so you’re someone willing to take responsibility for the culture and environment that you create around you.

What You’ll Do

Design systems and write code following bleeding edge industry best practices and help others on the team do the same. Review RFCs, technical specifications and code.
Deploy and maintain live software-based services at scale (up to 100m requests / second, 1m customers). Take regular shifts as part of the team’s On Call rota.
Support and grow other Engineers through knowledge sharing.
Keep up to date with trends in detecting current and emerging security risks to web applications and provide input on how these impact Cloudflare’s products.
Work with Engineers and Product Managers outside your immediate team in communicating our roadmap and getting things done.

Benefits

Cloudflare offers a positive and stimulating place to work, where you can enjoy friendly relationships with your colleagues and the freedom to have real impact on our products and customers. While the work is demanding, the company is unusual in offering an unlimited leave policy. This is not a “race to the bottom” or proxy for reducing the amount of leave taken; leaders around the company model the behaviour of always taking the time off that they need. In addition to a competitive base salary, Cloudflare offers an equity program with stock grants on joining and regular refreshers linked to performance. And in common with other big tech companies, we offer medical and dental insurance, mental health support, a tax efficient defined contributions pension plan and life insurance. Compensation Compensation may be adjusted depending on work location. Lisbon Estimated Base salary $66,000 - $91,000. Equity This role is eligible to participate in Cloudflare’s equity plan.

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! Please note that applicants who progress to the offer stage of the interview process may be asked to attend an in-person interview within one of the Cloudflare Offices or Cloudflare Hubs. More details about this will be available at that stage of the interview process. 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 hr@cloudflare.com or via mail at 101 Townsend St. San Francisco, CA 94107.

Senior Systems Engineer - Application Security

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