Senior Frontend Web Application Developer

Malwarebytes; United States; On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Medical insurance

Employee Referral Bonus Program

Wellness programs

Job summary

Malwarebytes is seeking a Senior Frontend Web Application Developer to build and evolve high-performance frontend applications that power millions of users. You will collaborate with designers via Figma to implement pixel-perfect UI, contribute to a scalable design system, and play a key role in an agile engineering team.

You will prototype and ship UI components, ensure accessibility and performance, and mentor peers while driving an ambitious roadmap with Product and QA.

Qualifications

• 3-5+ years of professional frontend web development experience.
• Strong proficiency with HTML5, CSS3/SCSS and modern CSS frameworks.
• Hands-on experience with Figma and translating designs into UI.
• Ability to prototype and build UI components from design systems or minimal direction.
• Experience building component libraries and design systems.
• Experience with state management solutions (Redux, Zustand, React Context).
• Proficiency with build tools (Webpack, Vite).
• Experience with testing frameworks (Jest, React Testing Library, Cypress, Playwright).
• Familiarity with RESTful APIs and frontend-backend integration.
• Git version control and collaborative workflows.
• Understanding of WCAG accessibility and best practices.

Responsibilities

• Build and maintain highly responsive, accessible frontend applications serving millions of users.
• Collaborate with designers to translate Figma designs into production-ready code.
• Prototype and develop UI components when design resources are limited.
• Develop and maintain a scalable design system and component library for consistency.
• Participate in agile/scrum, including sprint planning, reviews, and retrospectives.
• Ensure code quality with unit, integration, and end-to-end tests.
• Collaborate with Product, UX, and QA to deliver a high-quality roadmap.
• Optimize load times, rendering, and overall user experience.
• Mentor junior developers and conduct thorough code reviews.
• Stay current with frontend technologies and advocate for adoption when appropriate.
• Work as a team to achieve goals.

Skills

HTML5

CSS3/SCSS

Tailwind CSS

Styled Components

CSS Modules

Figma

Redux

Zustand

React Context

Webpack

Vite

Jest

React Testing Library

Cypress

Playwright

Git

WCAG

Tools

Figma

Webpack

Vite

Jest

React Testing Library

Cypress

Playwright

Redux

Zustand

React Context

Git

Job description

Senior Frontend Web Application Developer

Here at Malwarebytes, we believe that when you’re free from threats, you’re free to thrive. It all started in 2008 with one person who needed help with a malware infection, and a community coming together to find solutions. In that moment in time a product was born for all people, with a mission to rid the world of malware. Our product has since grown and evolved, from removing malware, to protecting devices, to ever-changing prevention.

About Malwarebytes Inc.

Malwarebytes began after our founder, Marcin Kleczynski, accidentally infected his parents’ computer while downloading a video game as a teenager. At the time, there was no product that could fully solve the problem, so he set out to build one. That early experience shaped our mission: to create protection that works when people need it most.
Since then, the digital threat landscape has only grown more complex. Attackers are faster, stealthier, and more sophisticated, while traditional solutions often overwhelm people with complicated tools and settings. At Malwarebytes, we believe protection should be both powerful and refreshingly simple because if security feels too hard to use, people will not use it. That is why our aspiration is always to stay one step ahead: cutting through the noise, stopping threats others miss, and delivering peace of mind in an unpredictable digital world.

About ThreatDown

ThreatDown, the corporate business unit of Malwarebytes, is redefining cybersecurity for growing businesses with solutions that stop ransomware, malware, phishing, and AI-powered attacks. Our platform is trusted, intuitive, and built for lean IT teams that need speed without complexity. At ThreatDown, you’ll join a team driven by innovation, resilience, and a passion for empowering businesses to thrive securely. If you\'re ready to make a real impact in cybersecurity, we’d love to meet you.

Malwarebytes/ThreatDown is looking for..

We’re not looking for people who know all the answers; we want people who can think creatively and are not afraid to bring forward new ideas. The problems we solve are meaningful, exciting, and constantly evolving. You’ll work together with other engineers in a fast-paced, agile environment, to build beautiful, responsive, and high-performance web applications. Your code will protect millions of customers from emerging threats and will restore their confidence in using their devices. Our consumer engineering team is looking for a Senior Frontend Web Application Developer ready for the challenge of delivering exceptional user experiences to our customers.

What You Will Do

• Build and maintain highly responsive, accessible, and performant frontend web applications that serve millions of users
• Collaborate closely with designers through Figma to translate designs into pixel-perfect, production-ready code
• Proactively create UI components, prototypes, and design implementations when dedicated design resources are unavailable
• Develop and maintain a scalable design system and component library to ensure consistency across applications
• Participate in our agile/scrum process, contributing to sprint planning, code reviews, and retrospectives
• Ensure code quality through comprehensive unit testing, integration testing, and end-to-end testing
• Collaborate with Product, UX, and QA to deliver an ambitious roadmap on time and with high quality
• Optimize application performance, including load times, rendering, and overall user experience
• Support your fellow team members: mentor junior developers, proactively communicate, and conduct thorough code reviews
• Stay current with emerging frontend technologies and advocate for their adoption when appropriate
• Work as a team to ensure everyone meets their goals

Skills You\'ll Need to Have:

• 3-5+ years of professional experience in frontend web development
• Strong proficiency in HTML5, CSS3/SCSS , and modern CSS frameworks (e.g., Tailwind CSS, Styled Components, CSS Modules)
• Hands-on experience working with Figma and collaborating with designers to implement UI/UX designs
• Demonstrated ability to prototype and build UI components independently from design systems or minimal design direction
• Experience building and maintaining component libraries and design systems
• Experience with state management solutions (Redux, Zustand, React Context, or similar)
• Proficiency in modern frontend build tools and bundlers (Webpack, Vite, etc.)
• Experience with testing frameworks such as Jest, React Testing Library, Cypress, or Playwright
• Familiarity with RESTful APIs and integrating frontend applications with backend services
• Experience with Git version control and collaborative development workflows
• Understanding of web accessibility standards (WCAG) and best practices
• Experience owning a project from concept to production, including proposal, discussion, and execution
• Self-motivated and self-managing, with strong organizational skills
• Comprehensive medical insurance coverage
• Employee Referral Bonus Program
• Wellness programs
• An opportunity to do something great for yourself and the world!