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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.

The Team

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, 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 Purpose

The role of a Senior Software Engineer in the Core Applications team is to design, develop, and maintain software solutions across the Core Applications software suite. Responsibilities include software architecture, design and development, testing and documentation across our backend and front-end platforms to deliver end-to-end features, working with product owners and designers to design and deliver new features and create high-quality user interfaces, taking operational responsibility for the performance and quality of services owned by the team, including taking part in an on-call rotation, deep diving into cutting edge technologies and working with the products team to transfer ideas into products. The role is also responsible for mentoring other developers at Five9.

How You Contribute

• Understands various programming languages, frameworks, and development methodologies, which allow you to make informed decisions and solve complex technical challenges.

• Writing high-quality, efficient, and maintainable code. Should follow coding best practices and contribute to the development of software modules, features, and functionalities.

• Troubleshoot and resolve complex technical issues. When problems arise, you use your experience and problem-solving skills to identify the root causes and implement effective solutions.

• Ensure that the development stays on track, milestones are met, and the project aligns with business objectives.

• Collaborate with cross-functional teams, including product managers, designers, and quality assurance professionals, to ensure that everyone is aligned on project goals and progress.

• Follows and contributes to processes, documentation, specifications, and APIs.

Skills, Competencies and Qualifications

Required

• Highly proficient in a variety of programming languages, including but not limited to TypeScript/JavaScript, Java, PHP, or others as required.

• Strong experience with web development technologies such as HTML, CSS, TypeScript/JavaScript, and modern front-end frameworks like React.

• Strong experience with server-side technologies, REST API design and implementation, microservice architecture, databases (SQL, NoSQL, and Redis), and back-end frameworks like Java Spring Boot.

• Awareness of web security best practices and the ability to implement security measures to protect applications and data.

• A portfolio of past projects showcasing full-stack design and development skills.

• Ability to work independently and as part of a collaborative team.

• Strong commitment to delivering high-quality, performant, and scalable code and solutions on time and within scope.

• Ability to mentor other developers directly and via code reviews.

• Bachelor's degree (or equivalent) in relevant discipline.

Desirable

• Experience with Contact Centre, IVR, Virtual Agents, VoIP and telecommunications service providers is advantageous.

• Experience with Google Cloud Platform, Kubernetes, and CI/CD.

Other Requirements

• 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.

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.