Senior Systems Engineer - Application Security

Cloudflare; United States; Hybrid; USD 66,000 - 91,000; Full time

Job summary

Cloudflare, Inc. in Lisbon is seeking an experienced software developer with 5+ years hands-on; proficiency in Go or Rust and exposure to Kubernetes, Kafka, Salt, and Systemd. You will design systems, deploy services at scale, and collaborate across teams to advance security-focused products.

This role requires two days in the office and a hybrid work arrangement. The position emphasizes shipping with modern tooling, strong Linux fundamentals, and a proactive culture that values initiative and

Qualifications

• Minimum 5 years of professional experience as a software developer.
• Proficiency with at least one of Go or Rust and exposure to devops tooling like Kubernetes, Salt, Kafka or Systemd.
• Strong Linux/Unix fundamentals and experience with distributed systems at scale.
• Experience with cybersecurity is preferred but not essential.

Responsibilities

• Design systems and write code following bleeding edge industry best practices and help others on the team do the same.
• 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 the company’s products.
• Work with Engineers and Product Managers outside your immediate team in communicating our roadmap and getting things done.

Skills

Go

Rust

Kubernetes

Salt

Kafka

Systemd

Linux fundamentals

Distributed systems

Cyber security

Job description

About Us

At the company, 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. the company protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by the company 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. the company was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company.

At the company, 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 the company’s fast-growing security product portfolio including WAF, Page Shield, Web Asset Management and API Shield. Being part of the company 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. the company 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.

the company’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 the company’s products.


• Work with Engineers and Product Managers outside your immediate team in communicating our roadmap and getting things done.

Benefits

the company 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, the company 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 the company’s equity plan.

What Makes the company 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 the company’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 the company 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.