Senior Systems Engineer, Workers Runtime

At Cloudflare, we're on a mission to help build a better Internet.

The Senior Systems Engineer, Workers Runtime role is part of the Emerging Technologies & Incubation team, which builds new products at the edge by combining Cloudflare's network scale with rapid product incubation.

Responsibilities

• Build features and improvements for the Workers Runtime.
• Improve runtime performance, reliability, and scale.
• Expand JavaScript API and WebAssembly support.
• Help shape features based on what is technically possible.
• Own code in production and debug issues in a large-scale distributed system.
• Work in a fast-paced, iterative environment that balances product goals with technical execution.

Desirable Skills, Knowledge & Experience

• 2+ years of recent professional experience with C++ or Rust.
• Strong computer science fundamentals, including data structures, algorithms, and software design.
• Operational mindset and experience owning production systems.
• Deep understanding of the web, including HTTP, JavaScript, and WebAssembly.
• Experience debugging and optimizing large-scale Linux-based distributed systems.

Bonus Points

• Experience building high-performance distributed systems in Rust.
• Experience with cloud or serverless platforms.
• Familiarity with JS engine internals such as V8, SpiderMonkey, or JavaScriptCore.
• Experience with standalone WebAssembly runtimes such as Wasmtime, Wasmer, or Lucet.
• Deep Linux, UNIX, kernel, or networking knowledge.
• Contributions to large open source projects.

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.