Cloudflare

Senior Software Engineer, Network Performance & Reliability

Cloudflare
hybrid senior full-time Hybrid
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First indexed 18 Apr 2026

Description

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.

We protect and accelerate 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.

What You’ll Do The Argo team was formed to own a very important aspect of Cloudflare's systems: enable more reliable network connectivity for Cloudflare’s products than the Internet itself provides. Almost all products in Cloudflare’s portfolio are or will be powered by Argo technology, including CDN, Spectrum, Magic Transit, Stream, Workers, Workers AI, R2, WARP, and more.

As a member of the Argo team, you’ll be a key technical contributor to the cutting edge network software infrastructure used by those products. You will work closely with various Engineering teams to translate their requirements into new capabilities on the platform. Likewise you will partner with Network Engineering and SRE to ensure that the technology makes the best use of Cloudflare's world-class edge network.

You will participate in all stages of the software development lifecycle, from designing and documenting systems, to writing code and automated tests, to planning, managing, and monitoring production software deployments. You will work with a wide range of technologies and programming languages, including Rust, Go, Linux networking, ClickHouse, PostgreSQL, Grafana, Kubernetes, and more.

Must-Have Skills

  • Systems-level programming experience in Go, Rust, C, or C++
  • A solid grasp of networking protocols in Layers 3 and 4 of the OSI Model
  • Knowledge of HTTP, TLS, and CDN networks
  • Experience in implementing secure and highly-available distributed systems
  • Experience with monitoring, alerting, and debugging large-scale distributed systems
  • Experience participating in an on-call rotation
  • Strong collaboration and communication skills
  • Experience/interest in network performance monitoring and tuning
  • Willingness to adopt and integrate AI tools and systems into your engineering workflow

Bonus Points

  • Knowledge of TCP/IP and Internet routing
  • Professional systems-level programming experience in Rust
  • Working knowledge of statistical-analysis techniques and control theory
  • Experience building tools and APIs
  • Experience using AI-assisted development tools (e.g., code completion, codebase analysis, log/data exploration) in a professional setting

Equity This role is eligible to participate in Cloudflare’s equity plan.

Benefits Cloudflare offers a complete package of benefits and programs to support you and your family. Our benefits programs can help you pay health care expenses, support caregiving, build capital for the future and make life a little easier and fun!

Time Off Flexible paid time off covering vacation and sick leave Leave programs, including parental, pregnancy health, medical, and bereavement leave

More information on the team: https://blog.cloudflare.com/orpheus-saves-internet-requests-while-maintaining-speed/ https://blog.cloudflare.com/orpheus/

This listing is enriched and indexed by YubHub. To apply, use the employer's original posting: https://job-boards.greenhouse.io/cloudflare/jobs/7446340