Senior VoIP Developer

This is a remote position. Location: Remote / Jaipur (Optional Onsite) Address: Sitapura, Jaipur Experience Required: 3+ Years in VoIP Development We are looking for an experienced and passionate VoIP Developer to join our growing tech team.

You will be responsible for designing, building, and maintaining robust and scalable VoIP systems including softswitches, dialers, PBX GUIs, billing solutions, and real-time integrations.

You must have expertise in platforms like Asterisk, FreeSWITCH, Kamailio, OpenSIPS, VICIdial, FreePBX, FusionPBX, and billing systems such as MagnusBilling and ASTPP. Experience with GUI development, API integrations, and multi-tenant VoIP systems is essential.

Requirements

Key Responsibilities: Build and manage VoIP platforms using: ○ Asterisk, FreeSWITCH, Kamailio, OpenSIPS ○ GUI frameworks: FreePBX, FusionPBX ○ Dialers: VICIdial, GoAutoDial ○ Billing platforms: MagnusBilling, ASTPP Design and develop custom IVRs, call routing logic, and SIP trunk integrations.

Develop web-based VoIP control panels, dashboards, and custom admin/client GUIs. Integrate with 3rd-party platforms like: ○ WhatsApp Business API ○ CRMs and SMS Gateways ○ Payment and Email Systems Perform SIP debugging, audio troubleshooting, NAT traversal handling, and codec optimization.

Work on multi-tenant architecture, high availability, failover, and security setup. Automate and script deployments using Bash, Python, or PHP. Manage VoIP instances on Proxmox, VMware, or cloud providers like AWS/DigitalOcean.

Confidential Required Skills & Experience: Minimum 3 years of experience in VoIP system development. Strong knowledge of SIP/RTP/NAT, VoIP codecs, and signaling.

Hands-on experience with: ○ Linux environments (Ubuntu, Debian, CentOS) ○ MySQL/PostgreSQL databases ○ Scripting in Bash/Python/PHP Tools: Wireshark, sngrep, tcpdump, Asterisk CLI, FS-CLI Preferred Skills (Bonus): Familiarity with WebRTC, STIR/SHAKEN, and telecom compliance. Experience in multi-tenant VoIP platform s