Senior Software Engineer, Workers Runtime

Available Locations: Austin, TX | Lisbon, Portugal | London, UK About the Department
Emerging Technologies & Incubation (ETI) is where new and bold products are built and released within Cloudflare. Rather than being constrained by the structures which make Cloudflare a massively successful business, we are able to leverage them to deliver entirely new tools and products to our customers. Cloudflare's edge and network make it possible to solve problems at massive scale and efficiency which would be impossible for almost any other organization.
About the Team
The Workers Runtime team delivers features and improvements to our Runtime which actually executes customer code at the edge. We care deeply about increasing performance, improving JS API surface area and compiled language support through WebAssembly, and optimizing to meet the next 10x increase in scale. The Runtime is a hostile environment - System resources such as memory, cpu, I/O, etc need to be managed extremely carefully and security must be foundational in everything we do.
What you'll do
We are looking for a Systems Engineer to join our team. You will work with a team of passionate, talented engineers that are building innovative products that bring security and speed to millions of internet users each day. You will play an active part in shaping product features based on what's technically possible. You will make sure our company hits our ambitious goals from an engineering standpoint.
You bring a passion for meeting business needs while building technically innovative solutions, and excel at shifting between the two-understanding how big-picture goals inform technical details, and vice-versa. You thrive in a fast-paced iterative engineering environment.
Examples of desirable skills, knowledge and experience

• At least 2 years of recent professional experience with C++ or Rust.
• Solid understanding of computer science fundamentals including data structures, algorithms, and object-oriented or functional design.
• An operational mindset - we don't just write code, we also own it in production
• Deep understanding of the web and technologies such as web browsers, HTTP, JavaScript and WebAssembly
• Experience working in low-latency real time environments such as game streaming, game engine architecture, high frequency trading, payment systems.
• Experience debugging, optimizing and identifying failure modes in a large-scale Linux-based distributed system.

Bonus Points

• Experience building high performance distributed systems in Rust.
• Experience working with cloud platforms, especially server-less platforms.
• Experience with the internals of JS engines such as V8, SpiderMonkey, or JavaScriptCore
• Experience with standalone WebAssembly runtimes such as Wasmtime, Wasmer, Lucet, etc
• Deep Linux/UNIX systems, kernel, or networking knowledge
• Contributions to large open source projects