Engineering Manager - Workers Runtime, Edge Team

<div class="content-intro"><div><strong>About Us</strong></div> <div> <p>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. Cloudflare protects and accelerates 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. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company. </p> <p><span style="font-weight: 400;">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! </span></p> </div></div><h3><strong>Available Locations: Austin | Lisbon | London (Hybrid)</strong></h3> <h3 id="EngineeringManagerWorkersRuntimeEdge-AbouttheDepartment"><strong>About the Department</strong></h3> <p>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.</p> <h3 id="EngineeringManagerWorkersRuntimeEdge-AbouttheTeam">About the Team</h3> <p>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.<br>Our work is deeply systems-oriented. We build and maintain the C++ and Rust codebase that embeds the JavaScript engine, manages isolate lifecycles, enforces resource limits (CPU, memory, I/O), and orchestrates how customer scripts are loaded, cached, and executed. We operate in a hostile multi-tenant environment where security must be foundational — from side-channel attack mitigations to isolate sandboxing — and performance is measured in microseconds.</p> <h3 id="EngineeringManagerWorkersRuntimeEdge-Whatyou'lldo"><strong>What you'll do</strong></h3> <p>We are looking for an Engineering Manager to lead the Workers Runtime - Edge team. You will own the team that keeps our runtime service running in production across Cloudflare's entire fleet and drives the architectural evolution of the platform.<br>You will:</p> <ul> <li data-uuid="5f495329-19c2-4578-91d7-069b78e47256">Lead a team of senior systems engineers working in C++ and Rust on one of the most performance-critical and security-sensitive services at Cloudflare.</li> <li data-uuid="71383b55-0646-4b67-b8b8-637eaa4cb258">Drive major infrastructure initiatives — migrating legacy systems, redesigning core abstractions, and laying the groundwork for next-generation runtime architecture that will define the platform for years to come.</li> <li data-uuid="d9d97d6a-a0a3-4a81-8233-ff23f9fa0654">Own reliability and release safety for ... (truncated, view full listing at source)