LeethubLeethub
JobsCompaniesBlog
Go to dashboard

Leethub

Curated tech jobs from FAANG and top companies worldwide.

Top Companies

  • Google Jobs
  • Meta Jobs
  • Amazon Jobs
  • Apple Jobs
  • Netflix Jobs
  • All Companies →

Job Categories

  • Software Engineering
  • Data, AI & Machine Learning
  • Product Management
  • Design & User Experience
  • Operations & Strategy
  • Remote Jobs
  • All Categories →

Browse by Type

  • Remote Jobs
  • Hybrid Jobs
  • Senior Positions
  • Entry Level
  • All Jobs →

Resources

  • Google Interview Guide
  • Salary Guide 2025
  • Salary Negotiation
  • LeetCode Study Plan
  • All Articles →

Company

  • Dashboard
  • Privacy Policy
  • Contact Us
© 2026 Leethub LLC. All rights reserved.
Home›Jobs›Five9›Senior Software Engineer - Frontend
Five9

About Five9

Empowering extraordinary customer experiences through cloud solutions

🏢 Tech👥 1K-5K📅 Founded 2001📍 San Ramon, California, United States

Key Highlights

  • Public company (NASDAQ: FIVN) with strong market presence
  • Over 2,000 customers including Zappos and ADT
  • Raised $200M+ in funding to date
  • Headquartered in San Ramon, California

Five9 is a leading provider of cloud contact center solutions, headquartered in San Ramon, California. With over 2,000 customers, including major brands like Zappos and ADT, Five9 offers a comprehensive CCaaS platform that integrates AI-driven analytics to enhance customer interactions. The company ...

🎁 Benefits

Five9 offers competitive salaries, stock options, generous PTO policies, and a flexible remote work policy to support work-life balance. Employees als...

🌟 Culture

Five9 fosters a culture focused on innovation and customer success, encouraging employees to leverage data and insights to drive impactful solutions. ...

🌐 Website💼 LinkedIn𝕏 TwitterAll 114 jobs →
Five9

Senior Software Engineer - Frontend

Five9 • Porto, Portugal (Hybrid)

Posted 1w ago🏢 HybridSeniorFrontend engineer📍 Porto
Apply Now →

Skills & Technologies

JavaJavaScriptgRPCREST APISalesforce

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 developing a next-generation solution focused on Salesforce integrations, including OpenCTI and Service Cloud Voice. The role involves building and maintaining Java-based backend microservices using gRPC and REST, along with JavaScript for Salesforce integrations. If you enjoy working on real-world integration challenges, writing clean and reliable code, and delivering high-quality user experiences, this role is for you. 
 
 
Key Responsibilities:
  • Be part of an agile team to develop a scalable, highly available cloud contact center software using Java and single-page JavaScript.
  • Collaborate with Product Managers, Architects, Engineering leaders and Test Engineers.
  • Deliver scalable software in both private cloud and public cloud settings (AWS and Google Cloud Platform).
  • Deliver using containers (docker, Kubernetes) using CI/CD in a DevOps model.
  • Bring a positive attitude to the team, helping mentor more junior engineers, drive our standards, show ownership and an obsession for our customers.

 

Required Skills:
  • 2+ years of professional experience developing Java applications – including delivering RESTful and gRPC apis. 
  • 5+ years of professional or open-source experience writing JavaScript MVC.
  • Agile coding experience, working in small teams making a big impact fast.
  • Familiarity with standard javascript async patterns (events, closures, callbacks, promises, error handling, etc.).
  • Strong CS fundamentals and an object oriented language (think an undergrad CS degree, or similar amount of work experience).
  • Positive, self-motivated and enthusiastic with a strong sense of ownership.
 
Appreciated Skills:
  • Experience with Salesforce integrations as OpenCTI and Service Cloud Voice.
  • Experience with Voice applications and/or SIP Protocols.
  • Experience with Contact Center or Call Center software.
  • 1+ years of professional or open-source experience with a JavaScript MVC toolkit such as React, Dojo, AngularJS, Backbone.js, Knockout or Ember.js.
  • 1+ years of experience delivering production software using Containers (Docker or similar).
  • 1+ years of experience delivering production software into Public Cloud.
  • Experience in a modern consumer environment (Pinterest, Box, Quora, Facebook...) and/or open source projects (contributed to node.js, dojo toolkit, NPM modules, etc).
  • Experience with GIT SCM.
  • Passion for user experience and strong design experience.
  • Experience with a data visualization package (Highcharts, d3.js, etc.).

 

Benefits:

  • Five9 Shares
  • Bonus Scheme
  • 10% Flex Benefit
  • Meal Allowance
  • Medical Insurance
  • Life Insurance 
  • 25 day Annual Leave + Public Holidays

 

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.

Interested in this role?

Apply now or save it for later. Get alerts for similar jobs at Five9.

Apply Now →Get Job Alerts