LiveKit Expert - SIP & Call Center Systems

About Us

Tram Case is revolutionizing legal technology with AI-driven tools that enhance efficiency and accessibility for legal professionals. We're undertaking high-impact technology transformation, partnering with a high-volume immigration law firm to optimize workflows and streamline processes. Join us in building the future of legal tech, where impactful innovation meets user-centric design.

Role Overview

We're seeking an experienced LiveKit developer with deep expertise in SIP protocols and large-scale call center implementations. You'll be responsible for building enterprise-grade telephony features supporting high-volume operations in a focused 2-month engagement. This is a critical infrastructure project that will enable our partner law firm to handle 1000+ phone extensions and 250+ concurrent calls with advanced call center features including supervisor monitoring, whisper coaching, and barge-in capabilities. You'll work directly with our engineering team to integrate LiveKit WebRTC with our Django/React stack, implementing production-ready telephony systems that meet enterprise reliability and scale requirements.

Key Responsibilities

• LiveKit Integration: Design and implement LiveKit WebRTC infrastructure integrated with our Django monolithic backend and React/Inertia.js frontend, ensuring seamless real-time communication capabilities.
• SIP Implementation: Build robust SIP trunking and call routing systems that support enterprise-grade telephony operations, including proper protocol handling, error recovery, and high availability.
• Extension Management System: Develop a scalable system to manage 1000+ phone extensions with intelligent routing, presence detection, and call distribution across a large distributed team.
• Advanced Call Control Features: Implement supervisor tools including:
  • Listen: Silent monitoring of live calls for quality assurance
  • Whisper: Private coaching channel to agents during active calls
  • Barge-in: Full supervisor intervention and call takeover capabilities
• Auto-dialer System: Build automated outbound calling infrastructure with intelligent routing, campaign management, and predictive dialing capabilities to optimize agent productivity.
• Performance and Scale: Ensure the system reliably handles 250+ concurrent calls with low latency, high audio quality, and graceful degradation under load.
• Documentation: Provide comprehensive technical documentation covering architecture, API integration patterns, deployment procedures, and operational runbooks for the engineering team.

Technical Proficiency

Must have production experience with:

• LiveKit WebRTC: Hands-on experience building and deploying real-time communications systems using LiveKit in production environments. Deep understanding of WebRTC protocols, media server architecture, and LiveKit's room and participant management.
• SIP Protocols: Expert-level knowledge of SIP trunking, SIP routing, RTP/SRTP media handling, and telephony standards (RFC 3261, etc.). Experience with SIP gateways and PBX integration.
• Call Center Architecture: Proven track record designing and implementing enterprise call center systems with:
  • 1000+ phone extensions
  • 250+ concurrent calls
  • High-availability and redundancy requirements
  • Real-time monitoring and metrics
• Django: Strong proficiency with Django framework, including views, ORM, REST APIs, and WebSocket integration for real-time features.
• React: Experience building real-time user interfaces with React, managing WebRTC state, and handling audio/video streams in the browser.
• Inertia.js: Familiarity with Inertia.js for seamless server-side/client-side integration, or ability to quickly learn the framework.
• Real-Time Systems: Understanding of WebSocket protocols, real-time event handling, connection management, and state synchronization in distributed systems.
• Audio/Video Codecs: Knowledge of audio codecs (Opus, G.711, G.722), video codecs, and quality optimization techniques for VoIP systems.
• Infrastructure: Experience with AWS or similar cloud platforms for deploying scalable real-time communication systems, including load balancing and media server deployment.

Qualifications

• LiveKit Production Experience: Minimum 1 year building production systems with LiveKit, with demonstrable projects showing scale and reliability. Portfolio or GitHub examples required.
• SIP Expertise: Deep understanding of SIP protocols with 2+ years of hands-on experience implementing telephony systems. Must understand SIP message flows, call states, and troubleshooting.
• Call Center Scale: Proven experience with enterprise call center implementations supporting 500+ extensions and 300+ concurrent calls minimum. References or case studies preferred.
• Full-Stack Capability: Strong backend and frontend skills with ability to implement complete features across the stack. Python/Django backend and React frontend experience required.
• Performance Optimization: Track record optimizing real-time systems for low latency, high throughput, and efficient resource utilization under load.
• Problem-Solving: Ability to independently diagnose and resolve complex issues in distributed real-time systems, including network problems, codec issues, and scalability bottlenecks.
• Communication: Strong written and verbal communication skills. Ability to document technical decisions, provide progress updates, and collaborate effectively with remote teams.
• Availability: Able to commit focused time over a 2-month engagement with clear deliverables and milestones. We value quality over speed but need predictable delivery.

Core Values and Culture

Tram Case is built on a foundation of shared principles that guide our work and interactions. We seek team members who embody and contribute to these values:

1. User-Centric Perspective: Build with empathy, ensuring every feature enhances our users' experience and addresses their needs.
2. Radical Transparency: Promote open communication and information sharing to make the best decisions and foster trust.
3. Purpose-Driven Work: Ensure each task aligns with our mission to deliver meaningful, innovative solutions.
4. Single Responsible Individual: Every team member takes ownership, driving tasks to completion with accountability.
5. Extreme Ownership: Learn and grow from challenges, continuously refining our work and striving for excellence.
6. Singular Focus: Dedicate attention to core objectives, eliminating distractions to achieve impactful results.
7. Documentation Excellence: Maintain clear and thorough documentation to enhance collaboration and continuity.
8. Data-Informed Decisions: Use data to guide priorities, ensuring our work delivers value to our users.
9. Compassionate Communication: Foster empathy and respect in dialogue, embracing diverse perspectives and encouraging respectful collaboration.
10. Excellence in Craft: Uphold high standards in functionality and design, committing to quality and impactful solutions.

Compensation

This is a contract engagement with competitive rates based on experience. We're looking for top-tier LiveKit and SIP expertise and compensate accordingly. Rate negotiable based on portfolio and relevant experience.