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Principal Systems Engineer

Cloudflare runs one of the world's largest networks powering millions of websites, providing protection and acceleration for Internet applications.
Backend
Principal Software Engineer
In-Person
1,000 - 5,000 Employees
8+ years of experience
Cybersecurity · Enterprise SaaS

Description For Principal Systems Engineer

Cloudflare is seeking a Principal Systems Engineer to help build their next-generation proxy that powers a quarter of the Internet's traffic. This is a crucial role for someone with deep expertise in HTTP, transport protocols, and congestion control. The position offers the unique opportunity to lead technical direction in a team that not only uses protocols but helps define them, working closely with IETF and open-source communities on QUIC, MASQUE, and emerging standards like ECH.

As a Principal Systems Engineer, you'll be at the forefront of designing and implementing Cloudflare's Rust-based proxy architecture, leading improvements in performance, reliability, and observability at a global scale. Your expertise in congestion control and transport behavior will directly influence product and architectural decisions. You'll also play a key role in shaping protocol evolution and representing Cloudflare in the standards community.

Cloudflare runs one of the world's largest networks, powering millions of websites and Internet properties for customers ranging from individual bloggers to Fortune 500 companies. The company's mission is to help build a better Internet, providing protection and acceleration for Internet applications without requiring hardware installation or code changes.

The role offers the opportunity to work on highly challenging infrastructure projects, contribute to open standards, and mentor other engineers. You'll be joining a company known for innovative projects like Project Galileo, the Athenian Project, and 1.1.1.1, demonstrating their commitment to protecting the free and open Internet.

This position is based in Bengaluru and requires in-person work. The ideal candidate will bring extensive experience in systems programming, deep protocol knowledge, and a proven track record of scaling high-performance systems. Join Cloudflare to make a significant impact on the future of Internet infrastructure.

Last updated 21 hours ago

Responsibilities For Principal Systems Engineer

  • Design and build next-gen Rust-based proxy architecture
  • Lead improvements in performance, reliability, and observability at global scale
  • Influence product and architectural decisions with expertise in congestion control and transport behavior
  • Shape protocol evolution and represent Cloudflare in the standards community
  • Mentor engineers and help grow deep protocol expertise across the team

Requirements For Principal Systems Engineer

Rust
  • Proven strong ability and experience in systems or network programming (Rust, C, etc.)
  • Knowledge of web server implementations (such as NGINX)
  • Deep understanding of HTTP/2, HTTP/3, QUIC, congestion control, or transport-layer protocols
  • Proven ability to scale systems under high throughput and low latency demands
  • Experience driving architecture or protocol-level change in production systems
  • Bonus: contributions to open standards or open source projects
  • Cryptography experience (nice to have)

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