LiveKit Expert - SIP & Call Center Systems

About UsTram 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 OverviewWe'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 ResponsibilitiesLiveKit 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 assuranceWhisper: Private coaching channel to agents during active callsBarge-in: Full supervisor intervention and call takeover capabilitiesAuto-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 ProficiencyMust 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 extensions250+ concurrent callsHigh-availability and redundancy requirementsReal-time monitoring and metricsDjango: 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.QualificationsLiveKit 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 CultureTram 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:User-Centric Perspective: Build with empathy, ensuring every feature enhances our users' experience and addresses their needs.Radical Transparency: Promote open communication and information sharing to make the best decisions and foster trust.Purpose-Driven Work: Ensure each task aligns with our mission to deliver meaningful, innovative solutions.Single Responsible Individual: Every team member takes ownership, driving tasks to completion with accountability.Extreme Ownership: Learn and grow from challenges, continuously refining our work and striving for excellence.Singular Focus: Dedicate attention to core objectives, eliminating distractions to achieve impactful results.Documentation Excellence: Maintain clear and thorough documentation to enhance collaboration and continuity.Data-Informed Decisions: Use data to guide priorities, ensuring our work delivers value to our users.Compassionate Communication: Foster empathy and respect in dialogue, embracing diverse perspectives and encouraging respectful collaboration.Excellence in Craft: Uphold high standards in functionality and design, committing to quality and impactful solutions.CompensationThis 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.