Full Stack Software Engineer WebRTC Softphone & IVR Flow Builder (Front End)

You will build the frontend interface for the Twilio-based voice platform used across all locations.
Phase 1 includes softphone UI, dashboards, real-time monitoring, and admin tools.
Phase 2 includes a visual IVR flow builder developed after MVP launch.

Responsibilities

• Build React/Next.js softphone and dashboards for admins, agents, and managers.
• Integrate Twilio Voice JS SDK for real-time WebRTC calling.
• Implement calling features such as dial/answer, mute, hold, transfer, and device selection.
• Develop dashboards: queue state, agent status, voicemails, recordings, location controls.
• Implement real-time updates using WebSockets (and optionally Twilio Sync).
• Create clean UI/UX with TailwindCSS or shadcn/ui and ensure accessibility.
• Ensure cross-browser WebRTC compatibility (Chrome, Safari, Firefox, Edge).
• Implement authentication (JWT/OAuth) and enforce role-based interfaces.
• Collaborate on backend API design and shared TypeScript models.
• Add Sentry logs and automated UI testing for WebRTC and device errors.
• Phase 2: Build the visual IVR builder using React Flow with versioning, preview, and publishing.

Must-Have Requirements

• 3+ years experience with React and TypeScript; Next.js strongly preferred.
• Hands-on experience integrating Twilio Voice JS SDK or similar WebRTC technologies.
• Strong understanding of WebRTC audio handling, device switching, and echo/noise issues.
• Experience with real-time applications (WebSockets, live dashboards, multi-user states).
• Strong UI/UX implementation skills with TailwindCSS, shadcn/ui, or Material UI.
• Experience consuming REST and WebSocket APIs.
• Knowledge of JWT/OAuth authentication flows.
• Experience with performance optimization and debugging media issues.
• Strong collaboration skills, especially around cross-functional API development.