Systems Engineer, Email Service

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: Lisbon, Portugal

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.

As a Systems Engineer focused on Cloudflare's Email Service, you will shape the future of industry-leading services that redefine what is possible for developers. We don't just copy what other cloud providers do; we work backward from developer needs, reimagining solutions by leveraging our unique global network.You will own your code from inception to release, delivering solutions at all layers of the software stack to empower Cloudflare customers. On any given day, you might implement innovative solutions for deliverability, optimize time-to-inbox, or design an API for a new product feature. You can expect to interact with a variety of languages and technologies including, but not limited to JavaScript, Typescript, Rust and Go.

This role may require flexibility to be on-call outside of standard working hours to address technical issues as needed.

• Experience with transactional email infrastructure at scale

• Strong knowledge of email deliverability / anti-spam standards (e.g. SPF, DKIM, DMARC, VERP)

• Knowledge of at least one modern strongly-typed programming language: we primarily use Rust, TypeScript, and Go.

• Experience with Cloudflare Developer Platform

• Proven ability to drive projects independently, from concept to implementation.

• Deep Linux / UNIX systems knowledge.

• Technical writing skills

• Experience building and scaling large-scale applications.

• For Portugal based hires: Estimated annual salary of €54,000 -