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Five9

Senior Software Engineer

Five9

Senior Software Engineer developing and enhancing modern SaaS platform for AI-driven customer engagement at Five9. Designing microservices, IAM systems, and addressing cloud software challenges.

Posted 5/20/2026full-timeRemote • 🇨🇴 ColombiaSeniorWebsite

Tech Stack

Tools & technologies
CassandraCloudGoogle Cloud PlatformJavaMicroservicesSpring

About the role

Key responsibilities & impact
  • Contribute to the next generation of Five9’s modern SaaS platform enabling AI-driven customer engagement.
  • Design and develop highly available, scalable, and reliable microservices infrastructure.
  • Build and enhance Identity & Access Management (IAM) systems supporting OAuth, security tokens, SSO, federation, and customer/partner identities.
  • Apply cloud and open-source technologies to solve complex platform challenges.
  • Gain deep understanding of existing systems and contribute to architectural improvements.
  • Troubleshoot production issues and provide operational support across the software stack.
  • Collaborate with cross-functional engineering teams and drive technical excellence.

Requirements

What you’ll need
  • Strong expertise in Java, APIs, Spring Security, and Web Authentication.
  • Hands-on experience with SSO, SAML, OAuth, Federation, IDP, and CI/CD for identity platforms.
  • Experience managing Ping Identity (architecture, configuration, and operations).
  • Ownership of production uptime, reliability, SLAs/SLOs, and incident response.
  • Participation in 24/7 on-call rotation for identity-related systems.
  • Experience in performance tuning microservices and database queries.
  • Familiarity with distributed databases such as CockroachDB or Cassandra.
  • Experience with cloud platforms (GCP preferred).

Benefits

Comp & perks
  • 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.

ATS Keywords

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Hard Skills & Tools
JavaAPIsSpring SecurityWeb AuthenticationSSOSAMLOAuthFederationCI/CDperformance tuning
Soft Skills
collaborationtechnical excellencetroubleshootingoperational supportownershipincident response