---
title: 'Senior Software Engineer in AI - FrontEnd React/Redux, Java at Five9'
canonical: 'https://feeny.ai/job/senior-software-engineer-in-ai-frontend-react-redux-java-five9-bengaluru-2qptgjcc9zv0'
type: 'job'
last_seen: '2026-09-10'
---

# Senior Software Engineer in AI - FrontEnd React/Redux, Java at Five9

- **Company:** Five9
- **Location:** Bengaluru, India
- **Work type:** hybrid
- **Posted:** 2026-09-03
- **Last confirmed live:** 2026-09-10
- **Apply:** https://www.five9.com/about/careers/job-detail?gh_jid=6180369004

## 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.

Senior Software Engineer in AI - Front End React/Redux, Java

Five9 is a leading provider of cloud software for the enterprise contact center market, bringing the power of the cloud to thousands of customers and facilitating more than three billion customer interactions annually. Five9 has led the cloud revolution in contact centers, helping organizations transition from legacy premise-based solutions to the cloud. The cloud contact center market has become the hot space for innovation in real-time communications, and is the tip of the spear for the application of Artificial Intelligence. Five9 has led the charge with its Genius AI platform. Five9 offers a high-energy environment with lots of room for personal and professional growth. Our innovative AI team is seeking a talented and experienced Senior Full Stack Software Engineer to join our Voice of Customer (VOC) team. AI experience is required for this role - you will work hands-on with AI technologies from vendors like Azure, OpenAI, Google, Databricks, IBM, and Amazon, and continue to build on some of the hottest skills on the market. An ideal candidate for us is an experienced engineer who is passionate about building high performance web platforms and applications, a brilliant problem solver and a creative self-starter.

Voice of Customer (VOC) is Five9’s AI-powered customer insights product. Every day, contact centers handle enormous volumes of voice and chat conversations that hold the clearest signal about what customers actually want - and almost none of it gets read. VOC applies AI to those conversations at scale to surface why customers are reaching out, how those reasons cluster and shift over time, and where the business should act. The result is a set of insights and analytics that CX and operations leaders use to make decisions, with the ability to trace any insight back to the conversations behind it.

Key Responsibilities:

- Implement UX designs by working with UX Designers on a day-to-day basis, using React/Redux based framework.
- Build the customer-facing insights experience for VOC - interactive dashboards, charts, and drill-down views over AI-generated insights.
- Be part of an agile team to develop a scalable, highly available application platform using modern PaaS platforms such as GCP.
- Participate and contribute to requirements analysis and grooming.
- Understand how to leverage PaaS components, such as CDN, noSQL databases when developing software in order to achieve scalability, reliability, and operability.
- Ability to build custom widgets for dashboards developed using Google Looker Studio plugins is a plus, but not required.
- Document and communicate clearly architecture and implementation solutions.
- Have ownership of your code in production, including on-call, troubleshooting.

Key Skills:

- 5+ years software development experience (mandatory).
- React/Redux focus.
- Highly proficient in JavaScript and Java.
- Hands-on experience building AI-powered product interfaces - presenting model output to users and supporting human review and correction of it.
- Experience building data-heavy or analytics interfaces - charts, dashboards, filtering, and large result sets.
- Experience with PaaS hosted relational and no-SQL databases.
- Desirable, but not required, experience with custom widget development using Google Looker Studio.
- Experience in operational code ownership - on-call, troubleshooting, uptime.
- Experience in applying modern UI design patterns and separating concerns in a distributed system.
- Familiarity with vibe coding using different AI tools like Claude Code.
- Must have experience working within an Agile/Scrum team.
- Positive, self-motivated and enthusiastic attitude with a strong sense of ownership.
- Strong pro-active communication skills, both verbal and written.
- AI skills in speech recognition and natural language processing are a plus but not required.
- Experience in contact center software is a plus but not required.

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

## Company Overview
- **One-liner**: Five9 provides a leading cloud contact center platform (CCaaS) that enables organizations to deliver digital engagement, analytics, workforce optimization, and AI-powered customer experiences.
- **Entity Type**: Public (NASDAQ: FIVN)
- **Headquarters**: San Ramon, California, USA (with additional offices in San Francisco, Toronto, London, Munich, Porto, Madrid, São Paulo, and Mandaluyong City)
- **Founded**: 2001
- **Founders**: Not publicly available

## Core Business
- **Primary industry/industries**: Cloud Contact Center as a Service (CCaaS), Customer Experience (CX) software, AI & Automation, Workforce Optimization
- **Target customers**: Enterprise, mid-market, and SMB organizations across all verticals (B2B/B2C)
- **Mission or purpose statement**: “Our vision is to make customer service a more human experience.” [five9.com](https://www.five9.com/about)

## Products & Services
- **Five9 Cloud Contact Center Platform**: Core omnichannel contact center solution (voice, email, chat, SMS, social) with intelligent routing and IVR.
- **Digital Engagement**: Integrated digital channels including SMS, web chat, email, and social messaging.
- **Five9 Analytics**: Real-time and historical reporting, speech analytics, and sentiment analysis to improve agent performance and customer outcomes.
- **Workforce Optimization (WFO)**: Workforce management, quality management, and recording (acquired Virtual Observer in 2021).
- **AI & Automation Suite**:
  - **Intelligent Virtual Agent (IVA)**: Conversational AI chatbot and voice bot for self-service (acquired Inference Solutions in 2021).
  - **Agent Assist 2.0**: AI-powered real-time agent guidance and summarization (using OpenAI).
  - **Voice AI Agents**: Generative AI agents for automated customer interactions.
- **Professional Services**: Implementation, integration, and consulting services.
- **Aceyus VUE**: Data and reporting integration platform (acquired in 2022).

## Market Standing
- **Valuation/Market Cap**: Publicly traded; specific metrics not provided in available sources.
- **Key Metric**: Over 3,000 customers worldwide; 350,000+ agents using the platform; 2,600+ employees; 1,450+ technology and channel partners. [five9.com](https://www.five9.com/about)
- **Notable Investors/Partners**: BT (expanded partnership for cloud adoption), MCM Telecom, XTT Mexico; partners include global SIs and technology vendors. Acquisitions: Acqueon, Aceyus VUE, Inference Solutions, Virtual Observer.
- **Growth Signals**: Named a Leader in the 2025 Gartner® Magic Quadrant™ for CCaaS (8th time); opened new European engineering hub in Porto, Portugal; expanded LATAM partnerships; introduced Agent Assist 2.0 with AI Summary; won Glassdoor Employees’ Choice Award for Best Places to Work (2022). [five9.com](https://www.five9.com/about)

## Competitive Advantages
- **Cloud-native heritage**: Born in the cloud in 2001, with 20+ years of CCaaS experience.
- **Analyst recognition**: Consistently named a Leader in Gartner Magic Quadrant, Forrester Wave, IDC MarketScape, and Aragon Research Globe.
- **High customer satisfaction**: 86 Net Promoter Score (NPS) for professional services.
- **Comprehensive AI portfolio**: Integrated IVA, Agent Assist, and Voice AI Agents differentiate from competitors.
- **Scale and reliability**: Manages billions of call minutes annually across 2,600+ concurrent agent seats (average).

## Strategic Focus
- **AI-first innovation**: Continued investment in generative AI and conversational AI to automate and enhance customer interactions.
- **Global expansion**: Strengthening presence in LATAM (new partnerships), EMEA (engineering hub in Portugal), and APAC.
- **Platform depth**: Integrating acquisitions (Acqueon, Aceyus, Inference Solutions) to provide end-to-end CX and WFO capabilities.
- **Partner ecosystem**: Deepening relationships with systems integrators and telcos (e.g., BT) to accelerate cloud migration.

## Why Work Here
- **Culture**: Fast-paced, start-up-like environment with established enterprise customers; values include honesty, respect, inclusion, transparency, ownership, and customer focus. [five9.com](https://www.five9.com/about/careers)
- **Diversity & Inclusion**: Committed to a diverse and inclusive culture where employees are empowered and heard. [five9.com](https://www.five9.com/about/careers/jobs)
- **Remote/Hybrid Policy**: Not explicitly stated; offices in multiple locations suggest hybrid/office model.
- **Benefits** (US full-time): 100% employer-paid health insurance (choice of 4 medical plans), dental, vision, life/disability insurance, 401(k), FSA, employee assistance program, commuter discounts, company equity, accrued PTO + paid holidays, company events. [five9.com](https://www.five9.com/about/careers)
- **Recognition**: Received Glassdoor Employees’ Choice Award for Best Places to Work (2022). [five9.com](https://www.five9.com/about)
- **Growth opportunities**: Internship program with impactful work and exposure to executives; career paths across development, customer success, sales, marketing, finance, and professional services.

## Sources
1. [Five9 About Page](https://www.five9.com/about)
2. [Five9 Careers Overview](https://www.five9.com/about/careers)
3. [Five9 Fact Sheet](https://www.five9.com/resources/five9-company-fact-sheet)
4. [Five9 Careers – Job Listings](https://www.five9.com/about/careers/jobs)

## Other roles at Five9

- [Director - IT Operations](https://feeny.ai/job/director-it-operations-five9-bengaluru-gmevvjtwe9ah) — Bengaluru, India
- [Director - IT Operations](https://feeny.ai/job/director-it-operations-five9-chennai-wnfm38zxqy2s) — Chennai, India
- [Mid Market Account Executive](https://feeny.ai/job/mid-market-account-executive-five9-united-kingdom-3p1xfk24v0zn) — United Kingdom
- [Enterprise App Admin II - Finance](https://feeny.ai/job/enterprise-app-admin-ii-finance-five9-chennai-39ssebcmvtcs) — Chennai, India
- [Enterprise App Admin II - DocuSign CLM Administrator & Workflow Developer](https://feeny.ai/job/enterprise-app-admin-ii-docusign-clm-administrator-workflow-developer-five9-n45x8w94aqca) — Chennai, India
- [Principal, Back-Office AI Transformation](https://feeny.ai/job/principal-back-office-ai-transformation-five9-irving-p0v627x1ba30) — Irving, TX
- [Senior Backend Engineer - Cortex| IND](https://feeny.ai/job/senior-backend-engineer-cortex-ind-five9-bengaluru-y65g5e5cy3w0) — Bengaluru, India
- [Enterprise App Admin II](https://feeny.ai/job/enterprise-app-admin-ii-five9-bengaluru-qv3827dbevvq) — Bengaluru, India
- [Enterprise App Admin II](https://feeny.ai/job/enterprise-app-admin-ii-five9-chennai-9295brmgd4cx) — Chennai, India
- [Senior Director, Enterprise AI](https://feeny.ai/job/senior-director-enterprise-ai-five9-irving-j7bsdh55zf0f) — Irving, TX