Sr Software Engineer - UI

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 team-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.

Role Overview

We're looking for a talented Frontend Engineer who leads with UI but isn't afraid to go deep. You thrive in a fast moving environment, ship polished interfaces with TypeScript and React and embrace AI-assisted development as a core part of your workflow. This role is front-end-first, but the expectation is that you'll grow into full stack ownership over time.

How You Contribute

• Design and build responsive, performant UIs using React, TanStack, Zustand, TypeScript and/or JavaScript

• Collaborate on feature development end-to-end, gradually taking on backend work as you grow

• Use GitLab for version control, CI/CD pipelines, merge request workflows, and issue tracking

• Deploy and manage workloads on Google Cloud Platform CDN, working alongside with services like GKE, and Cloud Storage

• Leverage AI-assisted (vibe coding) tools to accelerate development — you're comfortable using Copilot, Cursor, Claude, or similar tools as a force multiplier

• Write clean, maintainable code with strong typing and component reuse in mind

• Partner closely with designers and product to translate specs into real, shippable experiences

• Participate in code reviews, retrospectives, and architectural discussions