---
title: 'Senior Software Engineer - Frontend UI at Five9'
canonical: 'https://feeny.ai/job/senior-software-engineer-frontend-ui-five9-bengaluru-0w6dg96m4rgz'
type: 'job'
last_seen: '2026-09-10'
---

# Senior Software Engineer - Frontend UI at Five9

- **Company:** Five9
- **Location:** Bengaluru, India
- **Work type:** hybrid
- **Posted:** 2026-06-26
- **Last confirmed live:** 2026-09-10
- **Apply:** https://www.five9.com/about/careers/job-detail?gh_jid=6102705004

## 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.

## Role purpose

The Core Applications team is doing greenfield work, introducing new concepts and capabilities to our suite of UI products on a modern React + TypeScript stack.

As a Senior Software Engineer, you'll own significant portions of the codebase, drive technical decisions, and mentor fellow engineers. You'll collaborate closely with a distributed team across Australia and the US. This is a high-ownership role on a small, self-organizing team with direct visibility into a major product milestone.

## How you contribute

- Build and ship features on the new agent desktop in React + TypeScript + Nx, using AI coding agents as part of the daily workflow.
- Review and approve pull requests and provide constructive feedback that raises overall application quality.
- Mentor fellow engineers and help set the technical bar for the team.
- Collaborate async-first with engineering, product, and design across distributed time zones.
- Contribute to architectural decisions and async planning via written documentation, Jira, and Confluence.

## Skills, competencies and qualifications

Required:

- Strong React and TypeScript proficiency; experience with other modern frameworks (Vue, Angular, Svelte) is a good signal.
- Testing experience with Jest and/or Playwright, with an understanding of the value of thorough test coverage.
- Able to operate autonomously on a small, fast-paced team; fills gaps and makes reasonable calls without constant direction.
- Strong written communication and collaboration skills for a remote, async-first, distributed environment.
- Comfortable conducting code reviews, providing constructive feedback, and mentoring less experienced engineers.
- Prior experience using AI coding tools and a genuine willingness to evolve those skills as the space changes.
- Bachelor's degree (or equivalent) in a relevant discipline.

Desirable:

- Prior experience in CCaaS, agent desktop, or UI platform roles.
- Familiarity with TanStack Query and Zustand.
- Web accessibility knowledge; familiarity with WCAG standards and building accessible UIs.
- Monorepo and micro-frontend architecture experience; Nx preferred, but PNPM, Lerna, and other tools are good signals.
- Experience with WebSockets or real-time application development.

Other requirements

- Working shift must be aligned to overlap with Pacific working hours.
- This position requires the ability to be On Call.

## Key relationships

There are no direct reports to this role.

Key stakeholders include:

- Service owners and their teams
- Technical leadership and senior management, including VPs
- Engineering teams
- Network and Telecom teams
- Customer service teams
- Compliance and infosec teams
- This is not a customer-facing role.

This role is hybrid and requires 3 days a week in office.

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)

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