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Five9

Five9

San Ramon, California, United States of America

1K-5K Employees

Tech

Senior Software Engineer (API Gateway)

Colombia (Remote)

Posted on Feb 4, 2026

Full TimeSeniorOn SitePlatform - 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. We are actively looking for a Senior Software Engineer with experience working with API Gateway, Auth Systems, Security & Google Cloud Platform, to join our team. Five9 delivers market-leading up-time for its Contact Center application while constantly delivering new features and capabilities to highly demanding enterprise customers.

This requires that Five9 continually enhances, updates and modernizes the Platform Services that the Contact Center Application runs on. This position requires excellent understanding of cloud software: how it's built, deployed, tested and managed.   Key Responsibilities: Contribute to the next generation of Five9’s modern SaaS platform, providing businesses the ability to improve customer service through the power of AI in the Contact Center.

You will play a critical role in developing a highly available, highly scalable and reliable microservices with primary focus on API Gateway and API Developer Portal Stay updated on industry best practices and emerging trends in API management to recommend improvements and optimizations. Collaborate with development teams to ensure APIs are well-documented and accessible to internal and external stakeholders.

Design, develop, and maintain the API Developer Portal to enhance the overall developer experience. Design, implement, and manage API Gateway solutions to facilitate seamless communication between various services. Configure and maintain API Gateway policies, security settings, and access controls. Monitor and analyze API traffic to identify performance bottlenecks and optimize system efficiency.

You will apply your expertise of cloud computing stack, broad software technologies, and open-source tools to resolve what are often considered seemingly unsolvable cloud technology platform challenges for our customers. Gain deep application-level knowledge of existing systems as well as contributing to their overall design.

Dive deep into the software stack to troubleshoot and provide production support as needed.   Skills Required: You are an expert in API Gateway, API/Java/Spring, with 7+ years of related experience. Experience with API Gateway (APIGee) Proven experience in developing and maintaining API Developer Portals. Experience with Oauth2 is a plus.

You will apply your expertise of cloud computing stack, broad software technologies, and open-source tools to resolve what are often considered seemingly unsolvable cloud technology platform challenges for our customers.

Nice To Have

working experience with one of the major public cloud platforms, preferably GCP. Dive deep into the software stack to troubleshoot and provide production support as needed. Work with a team of peers, share a passion for what they’re creating and pull your own weight. 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

Platform - Product Engineering

Posted

on Feb 4, 2026

About

Job Link

www.five9.com

Financials

Type

public

Annual Revenue

$500M-$1B

Market Cap

$5B+

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