Senior VoIP Developer

Work set-up: 
Full Remote
Contract: 
Experience: 
Senior (5-10 years)
Work from: 

Offer summary

Qualifications:

Minimum 3 years of experience in VoIP system development., Strong knowledge of SIP, RTP, NAT, and VoIP codecs., Hands-on experience with Linux environments and databases like MySQL or PostgreSQL., Proficiency in scripting languages such as Bash, Python, or PHP..

Key responsibilities:

  • Design, build, and maintain VoIP systems including softswitches, dialers, and PBX GUIs.
  • Develop custom IVRs, call routing, and SIP trunk integrations.
  • Create web-based VoIP control panels and dashboards.
  • Integrate VoIP platforms with third-party services like WhatsApp API, CRMs, and payment systems.

ANM Cube P Ltd. logo
ANM Cube P Ltd. Human Resources, Staffing & Recruiting Startup https://www.anmcube.com/
1 - 10 Employees
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Job description

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 scaling.
● API development and third-party app integrations.
● Prior work in a telecom SaaS, startup, or CPaaS provider.

Benefits
What We Offer:
● Competitive salary based on skills and experience.
● Remote work flexibility and performance-based growth.
● Exposure to advanced telecom projects and platforms.
● Fast-paced, collaborative, and innovation-driven culture.

Required profile

Experience

Level of experience: Senior (5-10 years)
Industry :
Human Resources, Staffing & Recruiting
Spoken language(s):
English
Check out the description to know which languages are mandatory.

Other Skills

  • Collaboration
  • Problem Solving

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