Software Engineer II - Frontend - Voice

Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide.

Living our values everyday results in our
- first culture and enables us to innovate, grow, and thrive while enjoying the journey together. We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves.

You’ll join a
- functional team that owns the user experience for our global voice features. Working
-
- side with designers, product managers, and fellow engineers, you’ll turn product ideas and Figma
- ups into polished user interfaces, servicing both internal operations teams and customers who rely on our platform.

What you’ll do

• Build modern, responsive UIs in React, Type
  Script, and JSX—focusing on performance, accessibility (WCAG).
• Implement state management patterns (Redux Toolkit, Context, or equivalent) that keep complex data flows predictable and testable.
• Collaborate with designers & PMs to translate wireframes into delightful user interactions, advocating for
  -
  - class UX.
• Write clean, scalable code with thorough unit and component tests (Jest, React Testing Library).
• Integrate with RESTful APIs securely using JWT/OAuth.
• Contribute to our design system and help push forward component reusability and theming.
• Participate in agile ceremonies: sprint planning, peer reviews, and continuous delivery in Git
  Lab CI/CD.

Nice-to-have
- stack skills

If you enjoy working across the stack, you’ll have opportunities to contribute to our Spring Boot services (Java 21)—but this is not a prerequisite.

What you bring

• 5+ years of professional
  - end development experience, heavy on React + Type
  Script.
• Knowledge of modern CSS and responsive design principles.
• Strong grasp of software design patterns, data structures, and
  - code best practices.
• Experience consuming and designing RESTful APIs; comfort with tools like Postman/Insomnia.
• Proven record of writing automated tests across the pyramid (unit → E2E).
• Familiarity with accessibility standards, performance budgeting, and analytics instrumentation.
• Excellent collaboration and communication skills in both Portuguese and English (spoken & written).

Bonus points (but not required)

• Experience with Cloud Platforms such as GCP/AWS.
• Experience with CI/CD pipelines (Git
  Lab, Jenkins).
• Five9 Shares
• Bonus Scheme
• Medical Insurance
• Life Insurance
• 25 day Annual Leave + Public Holidays

Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer.

Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.