Full Stack Telecom Developer

Xinix.io

🇬🇧 English

Asterisk FreeSWITCH OpenSIPS Kamailio SIP RTP SRTP WebRTC SIP.js JsSIP STUN/TURN SBC PBX IVR SIP Trunking DID Routing OpenAI Anthropic Google Gemini Deepgram ElevenLabs Whisper Azure Speech Realtime APIs Function Calling RAG Node.js TypeScript Python Go PHP REST APIs WebSockets Redis RabbitMQ MySQL PostgreSQL MongoDB React Next.js Tailwind CSS HTML5 CSS3 JavaScript SMPP SMS Gateways Twilio Telnyx Vonage Linux Docker Docker Compose Git Nginx Apache CI/CD AWS GCP Hetzner Vultr FusionPBX FreePBX VICIdial Janus Coturn Kubernetes Prometheus Grafana multi-tenant SaaS architecture

Job description

About the role

We are seeking an experienced Full Stack Telecom Developer to design, build, and enhance our next‑generation AI Voice Platform, Contact Center, PBX, SBC, WebRTC, and SMS solutions. You will collaborate closely with the product team to turn ideas and technical specifications into production‑ready features across telephony, AI, backend, and frontend layers.

Key responsibilities

Develop telecom applications using Asterisk, FreeSWITCH, OpenSIPS, and Kamailio.
Build VoIP, SIP, WebRTC, AI Voice, Contact Center, PBX, SBC, and SMS solutions.
Create scalable backend APIs, micro‑services, and WebSocket services.
Design modern React/Next.js admin dashboards and frontend applications.
Integrate AI services such as OpenAI, Anthropic, Gemini, Deepgram, ElevenLabs, Azure Speech, and related APIs.
Implement SIP trunks, DIDs, IVRs, call routing, queues, conferences, recordings, AI agents, and SMS features.
Troubleshoot SIP, RTP, SRTP, NAT, codecs, WebRTC, and media‑related issues.
Write clean, well‑documented, production‑grade code and collaborate on design, testing, and deployment.

Required profile

Strong problem‑solving and debugging abilities.
Capacity to work independently and own features end‑to‑end.
Proven experience building telecom and AI products.
Ability to translate product plans and technical requirements into scalable solutions.
Passion for modern communication platforms.

Required skills

Asterisk, FreeSWITCH, OpenSIPS, Kamailio, SIP, RTP, SRTP, WebRTC, SIP.js, JsSIP, STUN/TURN, SBC, PBX, IVR, SIP Trunking, DID Routing.
OpenAI, Anthropic, Google Gemini, Deepgram, ElevenLabs, Whisper, Azure Speech, Realtime APIs, Function Calling, RAG.
Node.js, TypeScript, Python, Go, PHP, REST APIs, WebSockets, Redis, RabbitMQ, MySQL, PostgreSQL, MongoDB.
React, Next.js, Tailwind CSS, HTML5, CSS3, JavaScript.
SMPP, SMS Gateways, Twilio, Telnyx, Vonage.
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.

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