Senior Software Engineer - Backend - Core

BordeauxHybridsenior
EngineeringOtherBackend EngineeringSoftware EngineerBackend DeveloperSoftware Engineering
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Quick Summary

Key Responsibilities

Be part of an agile team to develop scalable, highly available core platform services. Participate and contribute to

Technical Tools
EngineeringOtherBackend EngineeringSoftware EngineerBackend DeveloperSoftware Engineering

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. 

 
Our team is looking for an energetic and experienced Senior Software Engineer who is passionate about creating high-performing, scalable, and resilient mission critical back-end services that are the foundation of Five9’s contact center platform. As a member of the team you will take end-to-end ownership of a solution to deliver services enriching our Contact Center platform and applications. In this highly visible and influential role your work will build the foundation to support the efforts of multiple teams. Your expert knowledge of building APIs will set the standard across the organization by eliminating inconsistencies and streamlining the efficiency of our core services.
 
Key Responsibilities:
  • Be part of an agile team to develop scalable, highly available core platform services.
  • Participate and contribute to requirements analysis and architecture.
  • Collaborate with product managers, architects, engineering leaders and test engineers.
  • Understand performance and scalability principles and apply when developing software.
  • Document and communicate clearly architecture and implementation solutions.
  • Troubleshoot and support current platform in production.
  • This position requires the ability to be part of on-call rotation, troubleshooting customer issues and drive issues to resolution.
Requirements
  • 8+ years of industry experience in server-side development.
  • 4+ years of Java backend development.
  • Experience with any public cloud platform.
  • Deep knowledge and experience in building Spring Framework applications.
  • Strong Computer Science fundamentals in design, data structures, algorithms, problem solving and complexity analysis.
  • Strong multithreading knowledge and experience.
  • Experience in designing and implementing RESTful and RPC interfaces.
  • Experience in applying design patterns and separating concerns in a distributed system.
  • Experience architecting, developing and deploying internet scale, distributed and mission critical services.
  • Strong understanding of event-driven systems.
  • Experience working with SQL and NoSQL databases and caches.
  • 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.

What We Offer

~1 min read
Five9 Shares
Bonus Scheme
10% Flexi Benefit
Meal Allowance
Medical Insurance
Life Insurance
25 day Annual Leave + Public Holidays

Listing Details

First seen
April 3, 2026
Last seen
April 26, 2026

Posting Health

Days active
23
Repost count
0
Trust Level
32%
Scored at
April 26, 2026

Signal breakdown

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Five9
Five9
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Five9 is a leading provider of cloud contact centre software.

Employees
3k+
Founded
2001
Domain
five9.com
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Five9Senior Software Engineer - Backend - Core