Senior Software Engineer - ZTC

Cloudflare, Inc.; Lisboa; On-site; EUR 66,000 - 83,000; Full time

Benefits offered by this job

Equity plan

Job summary

Cloudflare, Inc. in Lisbon seeks a software engineer to join the Zero Trust Connectivity team, building Rust-based services that connect Cloudflare One products across our global network.

You will design and implement a user-space connectivity layer, routing flows, and collaborate with teams on deployment, reliability, and performance. Knowledge of Rust, Layer 3/4 networking, and distributed systems is essential, with curiosity and clear communication valued.

Qualifications

• Experience in Rust development and systems programming.
• Strong knowledge of Layer 3/4 networking.
• Experience building large-scale, distributed systems.
• Ability to work across teams on design, development and deployment.

Responsibilities

• Contribute across a wide range of technologies to connect Cloudflare One products.
• Build a user-space connectivity service to route flows through our global network.
• Collaborate with cross-functional teams to design, develop, and deploy solutions.
• Embrace AI-assisted tools to accelerate development.

Skills

Rust

Layer 3/4 Networking

Linux systems programming

Distributed systems

Attention to detail

End-to-end ownership

Cross-team collaboration

Clear communication

AI-assisted development

Tools

ClickHouse

SaltStack

Prometheus

Cloudflare Workers

Job description

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: Lisbon, London, Austin

About the team

The Zero Trust Connectivity team builds the hub that connects Cloudflare One and Zero Trust products such as Cloudflare WAN, Cloudflare One Client, Cloudflare Tunnels, Gateway and Workers VPC. Powering this hub is a set of Rust-based services operating on every one of the data-centers that Cloudflare runs. These services route all of Cloudflare One traffic end to end. By leveraging Cloudflare’s incredible infrastructure and programming languages such as Rust, this critical service is safe, performant and secure.
As Cloudflare Zero Trust set of features evolves, this team is responsible for evolving these hub services to deliver those new capabilities while guaranteeing scalability and reliability as top priority.

We are a team of engineers who obsess over building reliable services which leverage Cloudflare’s unique architecture and global network footprint.

You can read more about what we work on here:

• https://blog.cloudflare.com/introducing-cloudflare-one/
• https://blog.cloudflare.com/from-ip-packets-to-http-the-many-faces-of-our-oxy-framework/
• https://blog.cloudflare.com/workers-vpc-open-beta/

About the role

As a software engineer on the Zero Trust Connectivity team, you will contribute across a wide range of technologies and systems to deliver new solutions that connect Cloudflare One products together. You will build connectivity in a user-space service that can identify and route flows across our global network. This work requires close collaboration with other teams while leveraging powerful frameworks and libraries that power many Cloudflare products. Our technology stack includes Rust, Linux networking, Clickhouse, SaltStack, Prometheus, AI harnesses, and our own Cloudflare Workers platform. We’re looking for determined, curious, empathetic engineers to join our team!

Desirable skills, knowledge, and experience

• Programming experience in Rust
• Familiar with Layer 3 and Layer 4 Networking
• Systems-level programming experience in Linux
• Experience building large-scale, reliable, highly distributed systems
• Attention to detail and ability to solve complex customer problems
• Own solutions end-to-end and driving the design, development, and deployment process
• Able to work across teams and level common, sustainable solutions
• Creative, open-minded, collaborative problem solver
• Focus on clarity in written and verbal communication
• Leveraging AI coding assistants to accelerate development

Compensation

Compensation may be adjusted depending on work location.

• For Lisbon based hires: Estimated annual salary of €66,000-83,000

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 them, 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 [e-mail] or via mail at 101 Townsend St. San Francisco, CA 94107.