Senior Systems Engineer

Available Locations: Austin, London, Lisbon About the Department
Production Engineering is responsible for the world's most reliable, observable, performant, and safe network ecosystem. Our customers rely on our products and systems to safely modify, troubleshoot, and release products without external impact.
Our external customers rely on us to provide seamless and predictable incident, traffic, policy management, resulting in the fastest and safest network services in the world.
We are accountable for the overall performance of internal and external facing services, guiding our product teams to optimal configurations and maximum efficiency. From the moment that a packet enters the Cloudflare ecosystem, we know exactly what its expected purpose and behavior is and we are capable of determining and exposing anomalous behavior.
The Cloudflare network makes it possible to solve challenges at massive scale and efficiency which would be impossible for almost any other organization.
About the Role
In this role, you can expect to:

• Design, write, and deliver software that improves Cloudflare's Internal and External platforms
• Scale and evolve systems through software and automation to improve reliability and velocity
• Work on highly distributed and scalable systems with a globally distributed team
• Participate in the constant cycle of knowledge sharing and mentoring
• Research and introduce cutting-edge technologies
• Contribute to open-source

We are well-funded, growing quickly and focused on building an extraordinary company. This is a systems reliability engineering role and is a superb opportunity to be part of a high performing team and help to support Cloudflare's mission and help build a better internet.
You will build services and APIs to constantly improve availability, performance, uptime and response times. The ideal candidates will have experience working with large-scale applications and a track record of producing great output. You must care deeply not only about the quality of your and the team's code, but also the user experience.
Qualifications

• We want someone who understands and obsesses over front-end systems.
• Passion for improving developer experience and increasing development velocity.
• Multiple years of experience in frontend engineering, specializing in JavaScript, TypeScript, and React.
• Strong knowledge of UI infrastructure, CI/CD, and testing frameworks (e.g., Playwright, Cypress).
• Proven ability to drive projects independently, from concept to implementation.

Preferred Skills:

• Expertise in React, TypeScript, and modern front-end systems
• Experience with modern JavaScript bundling tools like Webpack or Vite
• Familiarity with RESTful APIs
• Experience building and maintaining integration test suites with API mocks
• Experience building and scaling large-scale web applications.

Why Join Us?

• Help us shape and improve our customers' experience with Email Security
• Shape best practices and drive impactful engineering change.
• Work with modern technologies and solve large-scale challenges.