Senior Software Engineer Addressing Team

At Cloudflare we are on a mission to help build a better Internet. Today the company runs one of the worlds 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 Magazines Top Company Cultures list and ranked among the Worlds Most Innovative Companies by Fast Company.

At Cloudflare were not looking for people who wait for a polished roadmap; were 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 youre 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 youll fit right in.

About the Team

Cloudflare operates one of the largest and most interconnected anycast networks on the Internet. To make that happen a complex orchestra of IP address configuration and distributed systems need to be in harmony to deliver packets from users through our edge network and then onwards to our customers origin servers or networks.

On the Addressing team you will architect program and maintain core software services that enable large corporate networks to be protected by Cloudflare. Recent projects range from IP conservation efforts supporting use cases for Policy driven IP address assignment designing traffic engineering tools that improve the quality of service for billions of users around the world and building customer APIs to control BGP dynamically.

The Addressing team works closely with our system reliability engineers network engineers and product engineering teams to build automated systems that span the entire Cloudflare stack.

We are looking for talented Software Engineers to join our small but growing team. You will work on a range of microservices written mainly in Go. Youll be designing and developing new APIs and data models to manage our rapidly expanding addressing needs.

The ever growing suite of Cloudflare products and services means our addressing tools are always evolving. You will have the opportunity to take on very impactful projects critical for Cloudflare. You will spend time learning the inner workings of our edge routers servers DNS and IP provisioning pipelines. You will work closely with other engineers to understand their needs and create scalable platforms to be used across the company.

Some of the technologies we use include Go PostgreSQL Docker Kafka Lua Clickhouse SaltStack Prometheus and the usual Unix/Linux tools and workflows. We strive to build reliable fault-tolerant systems that can operate at Cloudflares scale.

• You are naturally curious and willing to take a step to learn something you dont have experience in
• You lead. We are a growing team and you will have a huge role shaping our products tools and system designs from the ground up
• You have experience writing high-quality code in one or more system programming languages (Go Python C/C)
• You have experience with modern Unix/Linux development and runtime environments
• You have a solid understanding of TCP/IP and basic networking in general
• You have a basic understanding of the HTTP/S/TLS stack
• You have a working knowledge of SQL and relational databases such as PostgreSQL or MySQL
• You have experience building and operating distributed systems
• You have excellent debugging skills and attention to detail when breaking down problems

• Experience working with Go
• Experience working with Rust
• Familiarity with UI design workflows and implementation
• Familiarity with anycast or multi-site unicast networks
• Knowledge of DNS and DNS based traffic management techniques (e.g geo DNS)

Were not just a highly ambitious large-scale technology company. Were 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 weve equipped more than 2400 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 Cloudflares 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 weve 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. Heres the deal - we dont 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 youd like to be a part of Wed 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 persons 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 or via mail at 101 Townsend St. San Francisco CA 94107.