Senior Software Engineer

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!

As a Senior Software Engineer, you will be expected to make significant contributions to the design and implementation of major development projects, working closely with our product managers and other teams to implement customer-impacting features. You will work on stimulating problems born out of the scale of our deployment, and the stringent quality, performance, and security requirements of our product.

In-depth knowledge of Windows internals, kernel-mode programming, and network protocols


Experience in low-level Windows driver development, ideally network drivers


Excellent programming skills, with experience writing very high-quality and low-complexity code with thorough documentation.


Strong experience writing easily-testable and thoroughly-tested code (e.g. using dependency injection with the right abstractions)


Great experience using lower-level languages, such as Rust, C, C++


Very comfortable writing multithreaded, asynchronous code


Strong experience with debugging network-related problems


An understanding of how VPN technologies work, and the trade-offs between privacy, security, and anonymity


Good understanding of, and experience with, security protocols and standards


Empathetic, proactive, and constructive communication skills, verbal and written