Senior Front End Engineer - Avaya Infinity Platform

About Avaya

Avaya is an enterprise software leader that helps the world’s largest organizations and government agencies forge unbreakable connections.

The Avaya Infinity™ platform unifies fragmented customer experiences, connecting the channels, insights, technologies, and workflows that together create enduring customer and employee relationships.

We believe success is built through strong connections – with each other, with our work, and with our mission. At Avaya, you'll find a community that values your contributions and supports your growth every step of the way.

Learn more at https://www.avaya.com

Job Description

We're building Avaya Infinity, a cloud-native real-time communication platform powering digital contact centers at scale. The frontend surfaces agent-facing real-time UIs, admin and configuration interfaces, a shared design-system library, and client SDKs — all serving customers who depend on these tools for every live interaction with their own users. Reliability is the #1 feature of this product. When our platform goes down, our customers can't talk to theirs.

 

As a Senior Front End Engineer, you'll own features end-to-end: from architecture and implementation through testing, deployment, and production reliability. You'll shape technical direction, mentor engineers on the team, and work closely with product and design to ship software that is rock-solid, low-latency, and performant at scale while meeting strict accessibility standards.

 

This is a hands-on senior IC role with leadership expectations — not a manager track.

 

What You'll Do

 

- Design and build performant, accessible SPAs for real-time contact center workflows (agent desktops, supervisor dashboards, configuration tools) where latency and throughput directly impact customer experience

- Contribute to and maintain a shared component library / design system used across product teams

- Write well-tested, production-grade TypeScript — both in React on the frontend and Node.js microservices where needed

- Build for reliability first: design features that degrade gracefully, handle network instability, and perform consistently under load

- Own production readiness: structured logging, metrics, alerting, and incident response for the services you ship

- Profile, measure, and optimize rendering performance, memory usage, and network efficiency in data-intensive real-time UIs

- Participate in architecture decisions and advocate for sustainable, well-documented patterns

- Document feature designs, technical decisions, and production troubleshooting playbooks so the team can operate and evolve systems without single points of knowledge

- Mentor other engineers through code review, pairing, and technical guidance

- Integrate AI-assisted development tools thoughtfully — using them to accelerate delivery while applying engineering judgment to the output

 

Our Current Stack

 

React 18/19, TypeScript, Redux Toolkit / RTK Query, Vite, React Router, Mantine, CSS Modules, Vitest, Playwright, Node.js / Express / Prisma, Kafka, Redis, PostgreSQL, Docker, Kubernetes, GitHub Actions, Argo CD, Azure.

What We're Looking For

Must Have

 

- 7+ years of professional software engineering experience**, with **5+ years focused on frontend development** using React and TypeScript

- Deep understanding of component architecture, performance optimization, and modern rendering patterns

- Reliability-first engineering — you build stable, resilient features and treat every edge case, error state, and failure mode as a first-class concern

- Performance and scale awareness — experience profiling and optimizing for latency, throughput, memory efficiency, and rendering performance in data-intensive UIs

- 2+ years of real-time UI experience — you've built interfaces powered by WebSockets, streaming data, or similar and understand the state management and performance challenges that come with them

- Accessibility expertise — practical experience implementing WCAG 2.2 AA: ARIA patterns, keyboard navigation, live regions, and automated a11y testing

- Strong testing discipline — unit, integration, and end-to-end testing are part of how you work, not an afterthought (e.g., Vitest/Jest, Testing Library, Playwright)

- 2+ years with a production ownership mindset — you've operated what you've built, responded to incidents, and improved reliability based on what you learned

- Technical mentorship — 2+ years of demonstrated ability to raise the bar for a team through