Software Engineer II

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.  Team Overview The Core Applications team takes pride in providing exceptional support and innovative solutions for a diverse range of essential applications and tools, including Agent Desktop Plus, Supervisor Plus, Admin Console, iPad Supervisor, Freedom Application Platform, Internal Admin (Shell), Agent Assist UI, Nimbus, and Unified Portal / Login. We have a passion for excellence. Our dedicated team is committed to optimizing user experiences, streamlining workflows, and enhancing productivity across the board. Whether empowering agents with intuitive interfaces, empowering supervisors with powerful management tools, or enabling seamless access to critical applications via multiple platforms, we strive to deliver with utmost efficiency and customer satisfaction. Our mission is to shape the future of Five9, where innovation and collaboration go hand in hand as we strive to build a world-class ecosystem of integrated solutions that cater to the ever-evolving needs of our valued users. Role Overview The Core Applications team is doing greenfield work, introducing new concepts and capabilities to our suite of UI products on a modern React + TypeScript stack. As a Software Engineer, you'll build features and take ownership of well-scoped work end-to-end. You'll collaborate closely with engineers across a distributed team spanning Australia, India, and the US. AI tools are a core part of how we work every day. Key Responsibilities Build and ship features on the new agent desktop in React + TypeScript + Nx, using AI coding agents as part of the daily workflow Take ownership of well-scoped work end-to-end, from implementation to testing to deployment Participate in code reviews and contribute to the shared quality bar Collaborate async-first with engineering, product, and design across distributed time zones Contribute to async planning via Jira, written documentation, and Slack Qualifications & Skills Strong React and TypeScript proficiency; experience with other modern frameworks (Vue, Angular, Svelte) is a good signal Testing experience with Jest and/or Playwright, with an understanding of the value of thorough test coverage Able to operate autonomously on a small, fast-paced team; fills gaps and makes reasonable calls without constant direction Strong written communication and collaboration skills for a remote, async-first, distributed environment Prior experience using AI coding tools and a genuine willingness to evolve those skills as the space changes Bachelor's degree (or equivalent) in a relevant discipline Preferred Skills Prior experience in CCaaS, agent desktop, or UI platform roles Familiarity with TanStack Query and Zustand Web accessibility knowledge; familiarity with WCAG standards and building accessible UIs Monorepo and micro-frontend architecture experience; Nx preferred, but PNPM, Lerna, and other tools are good signals Experience with WebSockets or real-time application development Other Requirements Working shift must be aligned to overlap with Pacific working hours This position requires the ability to be On Call Key Relationships There are no direct reports to this role. Key stakeholders include: Service owners and their teams Technical leadership and senior management, including VPs Engineering teams Network and Telecom teams Customer service teams Compliance and infosec teams This is not a customer-facing role. This role is hybrid and requires 3 days a week in office .   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.   View our privacy policy, including our privacy notice to California residents here:  https://www.five9.com/pt-pt/legal .   Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.

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