We are looking for an experienced Full Stack Telecom Developer to build and enhance our next-generation AI Voice Platform, Contact Center, PBX, SBC, WebRTC, and SMS Platform. You will work closely with the product team to transform product ideas and technical requirements into production-ready features across telephony, AI, backend, and frontend.

Responsibilities

Develop telecom applications using Asterisk, FreeSWITCH, OpenSIPS, and Kamailio.

Build VoIP, SIP, WebRTC, AI Voice, Contact Center, PBX, SBC, and SMS solutions.

Develop scalable backend APIs, microservices, and WebSocket applications.

Build up-to-date React/Next.js admin dashboards and frontend applications.

Integrate AI services including OpenAI, Anthropic, Gemini, Deepgram, ElevenLabs, Azure Speech, and related APIs.

Implement SIP trunks, DIDs, IVRs, call routing, queues, conferences, recording, AI agents, and SMS features.

Troubleshoot SIP, RTP, SRTP, NAT, codecs, WebRTC, and media issues.

Write clean, scalable, well-documented production code.

Collaborate with the product team to design, develop, test, and deploy new features.

Required Skills

Telephony: Asterisk, FreeSWITCH, OpenSIPS, Kamailio, SIP, RTP, SRTP,



WebRTC, SIP.js, JsSIP, STUN/TURN, SBC, PBX, IVR, SIP Trunking, DID Routing.

AI: OpenAI, Anthropic, Google Gemini, Deepgram, ElevenLabs, Whisper, Azure Speech, Realtime APIs, Function Calling, RAG.

Backend: Node.js, TypeScript, Python, Go, PHP, REST APIs, WebSockets, Redis, RabbitMQ, MySQL, PostgreSQL, MongoDB.

Frontend: React, Next.js, TypeScript, Tailwind CSS, HTML5, CSS3, JavaScript.

SMS: SMPP, SMS Gateways, Twilio, Telnyx, Vonage.

DevOps: Linux, Docker, Docker Compose, Git, Nginx, Apache, CI/CD, AWS, GCP, Hetzner, Vultr.

Preferred

FusionPBX, FreePBX, VICIdial, Janus, Coturn, Kubernetes, Prometheus, Grafana, multi-tenant SaaS architecture, and enterprise communication platforms.

What We're Looking For

Strong problem-solving and debugging skills.

Ability to work independently and own features end-to-end.

Experience building telecom and AI products.

Ability to convert product plans and technical requirements into scalable, production-ready solutions.

Passion for developing modern communication platforms.

📌 Full Stack Telecom Engineer (India)
🏢 Xinix.io
📍 India