Frontend (UI) Engineer, Email Security

Cloudflare; United States; Remote; USD 90,000 - 150,000; Full time

Job summary

Join a forward-thinking company as a Frontend (UI) Engineer, where you will enhance UI infrastructure and streamline UX workflows. Collaborate with design teams to deliver exceptional user experiences and optimize performance at scale. Your contributions will be pivotal in refining the developer experience and ensuring high-quality frontend delivery. This role offers the opportunity to work with modern technologies and tackle large-scale challenges, all while being part of a diverse and inclusive team committed to building a better Internet.

Benefits

Health insurance

Flexible working hours

Remote work options

Professional development opportunities

Wellness programs

Paid time off

Retirement savings plan

Employee stock options

Team-building activities

Diversity and inclusion initiatives

Qualifications

• 4+ years of experience in frontend engineering, specializing in JavaScript, TypeScript, and React.
• Strong knowledge of UI infrastructure, CI/CD, and testing frameworks.

Responsibilities

• Help build and scale the Email Security platform frameworks.
• Drive UI infrastructure excellence, including CI/CD, observability, and experimentation tools.

Skills

JavaScript

TypeScript

React

UI infrastructure

CI/CD

Cypress

RESTful APIs

Education

Bachelor's degree in Computer Science or related field

Tools

Webpack

Vite

Playwright

Job description

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.

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!

Available Locations: Lisbon, Portugal About the Department

The Email Security - Applications team builds and runs the UI platform customers with email protection use to onboard, analyze, investigate, and remediate. We also build and run the internal tools, platforms, and APIs that run that software. Individual engineering teams are typically responsible for large areas with considerable impact, and able to execute autonomously within that space to deliver value to their customers - be they internal or external.

About the Role

We are seeking a skilled Frontend (UI) Engineer to join the Email Security - Applications team. 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 customer experience. In this role, you will enhance UI infrastructure, streamline UX workflows, and collaborate across teams to improve code quality and developer velocity. Your contributions will be pivotal in refining the developer experience, ensuring high-quality frontend delivery, and optimizing performance and reliability at scale.

We believe that a great design and simple UX is at the heart of any successful product, and you will work closely with our design/UX team and must be comfortable seeking feedback from non-technical sources. We work iteratively and deploy often. We’re also strong believers in dog-fooding our own products. From Cloudflare Access to Cloudflare Workers and KV and R2 - these are all tools in our frontend engineer's tool belt.

Key Responsibilities

• Help build and scale the Email Security platform frameworks.
• Drive UI infrastructure excellence, including CI/CD, observability, and experimentation tools.
• Tackle cross-cutting concerns to enhance developer velocity, maintainability, and code quality.
• Upgrade and maintain the frontend codebase, modernizing legacy components to align with current best practices.
• Collaborate with product and design teams to deliver cohesive, self-serviceable user experiences.

Technologies We Use

React, TypeScript, JavaScript (ES6+), Cypress, Vite, Webpack, CI/CD tools, RESTful APIs

Qualifications

• We want someone who understands and obsesses over front-end systems.
• Experience designing, developing, and deploying M365 or Gmail Add-Ins a big plus.
• Passion for improving developer experience and increasing development velocity.
• 4+ 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.
• Expertise in performance optimization for frontend applications.
• 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.

What Makes Cloudflare Special?

We’re not just a highly ambitious, large-scale technology company. We’re a highly ambitious, large-scale technology company with a soul. Fundamental to our mission to help build a better Internet is protecting the free and open Internet.

Project Galileo : Since 2014, we've equipped more than 2,400 journalism and civil society organizations in 111 countries with powerful tools to defend themselves against attacks that would otherwise censor their work, technology already used by Cloudflare’s enterprise customers--at no cost.

Athenian Project : In 2017, we created the Athenian Project to ensure that state and local governments have the highest level of protection and reliability for free, so that their constituents have access to election information and voter registration. Since the project, we've provided services to more than 425 local government election websites in 33 states.

1.1.1.1 : We released 1.1.1.1 to help fix the foundation of the Internet by building a faster, more secure and privacy-centric public DNS resolver. This is available publicly for everyone to use - it is the first consumer-focused service Cloudflare has ever released. Here’s the deal - we don’t store client IP addresses never, ever. We will continue to abide by our privacy commitment and ensure that no user data is sold to advertisers or used to target consumers.

Sound like something you’d like to be a part of? We’d love to hear from you!

This position may require access to information protected under U.S. export control laws, including the U.S. Export Administration Regulations. Please note that any offer of employment may be conditioned on your authorization to receive software or technology controlled under these U.S. export laws without sponsorship for an export license.

Cloudflare is proud to be an equal opportunity employer. We are committed to providing equal employment opportunity for all people and place great value in both diversity and inclusiveness. All qualified applicants will be considered for employment without regard to their, or any other person's, perceived or actual race, color, religion, sex, gender, gender identity, gender expression, sexual orientation, national origin, ancestry, citizenship, age, physical or mental disability, medical condition, family care status, or any other basis protected by law. We are an AA/Veterans/Disabled Employer.

Cloudflare provides reasonable accommodations to qualified individuals with disabilities. Please tell us if you require a reasonable accommodation to apply for a job. Examples of reasonable accommodations include, but are not limited to, changing the application process, providing documents in an alternate format, using a sign language interpreter, or using specialized equipment. If you require a reasonable accommodation to apply for a job, please contact us via e-mail at [e-mail] or via mail at 101 Townsend St. San Francisco, CA 94107.