Software Engineer - IP Address Management

2 months agoAustin, TX
About Us

At Cloudflare, we have our eyes set on an ambitious goal: to help build a better Internet. Today the company runs one of the world’s largest networks that powers approximately 25 million 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! 

About the Addressing 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 and program the core software services that enable large corporate networks to be protected by Cloudflare. Recent projects range from writing code in Cloudflare’s edge DNS server, 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.

Your Responsibilities

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. You’ll 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 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 Cloudflare’s scale.

About You

  • You are naturally curious and willing to take a step to learn something you don’t 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 experience building and operating distributed systems
  • You have a working knowledge of SQL and relational databases such as PostgreSQL or MySQL
  • You have excellent debugging skills and attention to detail when breaking down problems

Bonus Points

  • Experience working with Go
  • Familiarity with anycast or multi-site unicast networks
  • Knowledge of DNS and DNS based traffic management techniques (e.g geo dns)
  • Familiarity working with IP Address Management Systems

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: We equip politically and artistically important organizations and journalists 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: We created 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.

Path Forward Partnership: Since 2016, we have partnered with Path Forward, a nonprofit organization, to create 16-week positions for mid-career professionals who want to get back to the workplace after taking time off to care for a child, parent, or loved one. We released 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 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 or via mail at 101 Townsend St. San Francisco, CA 94107.