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Senior VoIP Developer

Role overview

Qualifications

  • 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) and databases (MySQL/PostgreSQL).
  • Scripting skills (Bash/Python/PHP) and familiarity with debugging tools (Wireshark, sngrep, tcpdump).

Responsibilities

  • Build and manage VoIP platforms using Asterisk, FreeSWITCH, Kamailio/OpenSIPS; work with GUI frameworks like FreePBX/FusionPBX, dialers such as VICIdial/GoAutoDial, and billing systems MagnusBilling/ASTPP.
  • Design and develop custom IVRs, call routing logic, and SIP trunk integrations; create web-based VoIP control panels and admin/client GUIs.
  • Integrate with third-party platforms (WhatsApp Business API, CRMs; SMS gateways; payment and email systems) and support multi-tenant architectures with high availability, security, and failover.
  • Perform SIP debugging, audio troubleshooting, NAT traversal handling, and codec optimization; automate deployments with Bash/Python/PHP; manage VoIP instances on Proxmox/VMware or cloud providers (AWS/DigitalOcean).

About the company

ANM Cube P Ltd. logo

ANM Cube P Ltd.

Human Resources, Staffing & Recruiting

ANM Cube is an initiative to support job seekers acquire the skills and knowledge required by present day businesses, at the same times work towards helping businesses identify the training needs and plan the training for their existing staff leading to better performance. Businesses can also get benefited by getting the screened and trained candidate profiles for their immediate hiring requirements, reducing the hiring cycle time and getting the perfect fit for job team member. We screen our candidates for job credentialing, identify their training needs, train them on the basic skills and organizational behavior. Our AI enabled platform match the ideal job seeker profile with the job listing considering the employer requirement and introduce them to businesses for hiring. We help businesses by providing them the trained resource profiles and hiring support. We also offer training services on our pre-designed and customized training. Our pool of specialized trainers and advisors can plan and run workshops for existing employees to identify their current training needs and help them achieve the skills desired for their job profile to perform better. For job seekers, we provide training need identification(TNI), training modules, organizational case studies, counselling sessions, peer community access and help them with job assistance in best of the organizations. We are growing with a robust artificial intelligence (AI) based platform that intelligently screens and matches the job seeker profiles with closely fit job postings and companies.

Company details

Company typeStartup
IndustryHuman Resources, Staffing & Recruiting
Company size1 - 10

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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.

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MR

Marcus Rivera

Chief Revenue Officer

m.rivera@company.com
linkedin.com/in/marcusrivera
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