CloudFlare
Position Title: Software Engineer - Network Services
Available Locations: Austin, Lisbon, London. The role is hybrid, requiring 2 days per week in the office.
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.
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 Engineering at Cloudflare Cloudflare Engineers build and operate the software that helps power 25+ million Internet properties and millions of businesses worldwide. Across our engineering organizations, we have opportunities for high‑caliber, curious and empathetic people to take on big challenges and build some of the best skills in the industry.
Welcome to an environment where you will build high‑growth products, help scale our expanding network, build tools to improve availability, performance, uptime, and response times, and make systems failure‑resistant and ready‑to‑scale.
As a Software Engineer at Cloudflare, you’ll work on code that runs close to the end user, at massive scale, and is deployed to 330+ cities worldwide.
Examples of software systems at Cloudflare
A TLS/HTTP proxy to make the connection from eyeball to edge as fast and secure as possible
Filtering malicious traffic and handling good traffic according to customer configuration
Content optimization that makes content served from customer sites more performant
A platform that runs serverless Workers and provides a key‑value store
A reverse‑proxy system that caches customer website content according to configuration
Optimization of connections from Cloudflare to our customers’ origin servers to reduce load and increase performance
Our Authoritative DNS server and our public resolver 1.1.1.1
Data Science diving deep into HTTP request data, identifying malicious and fraudulent traffic patterns, and building novel solutions for mitigating such attacks
Full Machine Learning platform and model development, from feature engineering to model deployment to monitoring
One of the biggest data pipelines in the world, operating at well over 250M events per second
We operate some of the fastest and most widely distributed services on the Internet. Your work will focus on building robust, secure, and high‑performance distributed systems with a massive impact.
Requirements for any role While not listed as a specific requirement, most roles need the flexibility to be on‑call outside of standard working hours to address technical issues as needed.
First and foremost curiosity and critical thinking
Experience (and love for) debugging to ensure the system works in all cases
Experience with a continuous integration workflow and using source control (we use Git)
Designing and building APIs
Understanding of what it takes to build secure systems
Confidence to work in multiple programming languages – bonus points for Go and/or Rust
Examples of desirable skills, knowledge, and experience
Understanding systems at the network protocol level, including differences between specifications and real‑world behavior
Strong systems‑level programming skills
Optimization of complex solutions
Experience with databases (PostgreSQL and ClickHouse)
Understanding of distributed system maintenance and architecture
Good Unix knowledge; having submitted OS patches is a huge plus for some roles
Experience with monitoring, alerting, and debugging high‑volume production systems
Fluent in analyzing data sets such as logs
Understanding of security and fraud detection systems
What Makes Cloudflare Special? We are not just a highly ambitious, large‑scale technology company. We are a company with a soul, committed to 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 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 constituents have access to election information and voter registration. Since then, 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 build a faster, more secure, privacy‑centric public DNS resolver. It is the first consumer‑focused service Cloudflare has ever released. We do not store client IP addresses and remain committed to privacy, ensuring 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. 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 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. 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.
Equal employment opportunity, including veterans and individuals with disabilities.
#J-18808-Ljbffr
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.
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 Engineering at Cloudflare Cloudflare Engineers build and operate the software that helps power 25+ million Internet properties and millions of businesses worldwide. Across our engineering organizations, we have opportunities for high‑caliber, curious and empathetic people to take on big challenges and build some of the best skills in the industry.
Welcome to an environment where you will build high‑growth products, help scale our expanding network, build tools to improve availability, performance, uptime, and response times, and make systems failure‑resistant and ready‑to‑scale.
As a Software Engineer at Cloudflare, you’ll work on code that runs close to the end user, at massive scale, and is deployed to 330+ cities worldwide.
Examples of software systems at Cloudflare
A TLS/HTTP proxy to make the connection from eyeball to edge as fast and secure as possible
Filtering malicious traffic and handling good traffic according to customer configuration
Content optimization that makes content served from customer sites more performant
A platform that runs serverless Workers and provides a key‑value store
A reverse‑proxy system that caches customer website content according to configuration
Optimization of connections from Cloudflare to our customers’ origin servers to reduce load and increase performance
Our Authoritative DNS server and our public resolver 1.1.1.1
Data Science diving deep into HTTP request data, identifying malicious and fraudulent traffic patterns, and building novel solutions for mitigating such attacks
Full Machine Learning platform and model development, from feature engineering to model deployment to monitoring
One of the biggest data pipelines in the world, operating at well over 250M events per second
We operate some of the fastest and most widely distributed services on the Internet. Your work will focus on building robust, secure, and high‑performance distributed systems with a massive impact.
Requirements for any role While not listed as a specific requirement, most roles need the flexibility to be on‑call outside of standard working hours to address technical issues as needed.
First and foremost curiosity and critical thinking
Experience (and love for) debugging to ensure the system works in all cases
Experience with a continuous integration workflow and using source control (we use Git)
Designing and building APIs
Understanding of what it takes to build secure systems
Confidence to work in multiple programming languages – bonus points for Go and/or Rust
Examples of desirable skills, knowledge, and experience
Understanding systems at the network protocol level, including differences between specifications and real‑world behavior
Strong systems‑level programming skills
Optimization of complex solutions
Experience with databases (PostgreSQL and ClickHouse)
Understanding of distributed system maintenance and architecture
Good Unix knowledge; having submitted OS patches is a huge plus for some roles
Experience with monitoring, alerting, and debugging high‑volume production systems
Fluent in analyzing data sets such as logs
Understanding of security and fraud detection systems
What Makes Cloudflare Special? We are not just a highly ambitious, large‑scale technology company. We are a company with a soul, committed to 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 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 constituents have access to election information and voter registration. Since then, 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 build a faster, more secure, privacy‑centric public DNS resolver. It is the first consumer‑focused service Cloudflare has ever released. We do not store client IP addresses and remain committed to privacy, ensuring 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. 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 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. 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.
Equal employment opportunity, including veterans and individuals with disabilities.
#J-18808-Ljbffr