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Five9

Five9

San Ramon, California, United States of America

1K-5K Employees

Tech

Senior Software Engineer

India, Chennai

Posted on Jan 30, 2026

Full TimeSeniorOn SiteCore - Product Engineering

Job Description

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    CRM & SDK team is focusing on integrating Five9 dialer into multiple CRM systems and works with variety of backend and frontend technologies    The Role Purpose  Be part of an agile team to develop a scalable, highly available global voice platform  Collaborate with Product Managers, Architects, Engineering leaders and Test Engineers Understand performance and scalability principles and apply them when developing software  Troubleshoot and support current platform in production (we embrace DevOps) Designs, develops, troubleshoots, debugs, and implements software code using JavaScript, Java, Spring, and related technologies  Write unit and functional tests, be able to document and communicate clearly   Skills, Competencies and Qualifications Required  5+ years of industry experience in backend development (Java)  5+ years of industry experience in frontend development (JavaScript, TypeScript, React)  Deep knowledge and experience with frameworks such as Spring  Hands on Experience in designing and implementing scalable, high performing Microservices providing REST APIs  Strong expertise in web development technologies, including HTML, CSS, and modern front-end frameworks.  Experience working with cloud platforms such as GCP or AWS.  Expertise server-side technologies and databases (SQL or NoSQL).  Experience working on complex problems spanning multiple products and systems  Experience working within an Agile/Scrum team Positive, self-motivated and enthusiastic attitude with a strong sense of ownership  Strong communication skills, both verbal and written   Desirable  Hands-on experience with Kubernetes for container orchestration.  Knowledge of real-time communications (SIP, RTP, etc.) is a plus.  Experience with Backbone, Handlebars.  Experience with automated testing frameworks (Nightwatch)    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.

About Five9

Five9, Inc., together with its subsidiaries, provides cloud software for contact centers in the United States and internationally. The company offers virtual contact center cloud platform that delivers a suite of applications, which enables the breadth of contact center-related customer service, sales, and marketing functions.

Its solution enables its clients to manage these customer interactions across various channels, including voice, video, chat, email, website, social media, click-to-call,...

Job overview

Employment type

Full Time

Experience level

Senior

Work type

On Site

Department

Core - Product Engineering

Posted

on Jan 30, 2026

About

Job Link

www.five9.com

Financials

Type

public

Annual Revenue

$500M-$1B

Market Cap

$5B+

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