Engineering Manager - Workers Runtime, Edge Team

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

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.

At Cloudflare, we’re not looking for people who wait for a polished roadmap; we’re looking for the builders who see the cracks in the Internet that everyone else has simply learned to live with. We value candidates who have the instinct to spot a "normalized" problem and the AI-native curiosity to create a solution using the latest tools.

Our culture

is built on iteration, leveraging AI to ship faster today to make it better tomorrow, while ensuring that every improvement, no matter how small, is shared across the team to lift everyone up

If you’re the type of person who values curiosity over bureaucracy, and that AI is a partner in solving tough problems to keep the Internet moving forward, you’ll fit right in.

Available Locations: Austin, Lisbon, or London (Hybrid) About the Role 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.

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.

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 e