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Sr Application Security Software Engineer

Cloudflare

Company : Cloudflare

Location : San Francisco, CA, 94199

Posted Date : 12 October 2025

Job Type : Other

Category : Software Development

Occupation : Software Engineer

Job Details

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.

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.

Available Locations: Bengaluru

About The Role

A Security Operations Center (SOC) is typically something that a company will have to understand their systems' security risks and alert when any issues arise. We want to enable SOC teams to leverage Cloudflare data, logging, and events directly in Cloudflare's dashboard. This means we want to add new functionality to understand and react to any threats. This role is all about dealing with large amounts of data and helping customers understand it very quickly, as well as notifying customers about important happenings on that data.

Cloudflare is a system spanning the globe, on a mission to make the Internet better, safer, and more powerful every day. As a Software Engineer at Cloudflare, you'll work on the code that runs close to the end user, runs at a massive scale, and is deployed to 330+ cities around the world.

Desirable skills, knowledge and experience

  • 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

  • 5+ years of experience in understanding systems at the network protocol level, including the differences between what the specs say, and what actually happens on the Internet
  • Strong systems level programming skills
  • Optimization of complex solutions
  • Experience with databases (we use PostgreSQL and Clickhouse)
  • Understanding what it takes to build and maintain distributed systems
  • Experience with monitoring, alerting and debugging high volume production systems
  • Fluent in analyses of data sets such as logs
  • Understanding of security and fraud detection 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 : 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 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.

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.

Cloudflare provides reasonable accommodations to qualified individuals with disabilities. Please tell us if you require a reasonable accommodation to apply for a job.

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