We’re Hiring: VoIP Engineer

Zentroverse Global Pvt. Ltd., a startup-qualified technology company developing SaaS, CRM, AI-enabled customer engagement and business automation solutions, is looking for an experienced VoIP Engineer to help us build ZentroDIAL—our own own cloud-based IVR, autodialer and BPO contact-centre platform.

Position: VoIP Engineer

Experience: 3–5 years

Engagement: Full-time / Part-time / Freelance

Location: Patna / Remote / Hybrid

Key Responsibilities

- Design and develop ZentroDIAL’s cloud telephony architecture
- Configure and manage FreeSWITCH or Asterisk
- Integrate SIP trunks from Indian telecom operators
- Develop inbound and outbound calling systems
- Configure IVR, call queues and skill-based routing
- Implement preview, progressive and power dialers
- Support development of predictive-dialer functionality
- Integrate WebRTC-based calling into the agent web panel
- Implement call recording, hold, transfer and conference calling
- Integrate real-time call events with ZentroFLOW CRM
- Configure Kamailio/OpenSIPS, SBC and SIP security
- Diagnose call failures, one-way audio, latency, echo and dropped calls
- Monitor call quality, concurrent channels and telecom connectivity
- Support carrier failover, scalability and production deployment

Required Skills

- Strong hands-on experience with FreeSWITCH and/or Asterisk
- Positive understanding of SIP, RTP, WebRTC and VoIP protocols
- Experience with SIP-trunk and IP-PBX integration
- Knowledge of Kamailio, OpenSIPS or similar SIP-routing technologies
- Experience with SIP.js or JsSIP for browser-based calling
- Understanding of Coturn/TURN, NAT,



firewalls and audio codecs
- Experience with call queues, IVR, recordings and dialer systems
- Working knowledge of Linux and cloud environments
- Familiarity with Wireshark, SIPp and SIP troubleshooting
- Ability to integrate telephony systems with APIs, CRMs and web applications

Preferred Qualifications

- Previous experience developing a BPO/contact-centre platform
- Experience with progressive or predictive autodialers
- Experience integrating Airtel, Jio, Vi or other enterprise SIP trunks
- Knowledge of multi-tenant SaaS architecture
- Understanding of call-detail records, call monitoring and voice analytics
- Familiarity with telecom security and Indian commercial-calling requirements

About ZentroDIAL

ZentroDIAL is being developed as a carrier-independent, cloud-based communication platform providing:
- Cloud IVR
- Inbound and outbound contact centre
- Browser-based agent calling
- Autodialer and campaign management
- Call recording and monitoring
- Supervisor dashboards
- CRM integration
- Call analytics and AI-enabled quality monitoring

We are looking for someone who can contribute not only as an engineer but also as a technical partner in developing a scalable and reliable product.

Interested candidates and freelancers may share their profile, project experience, availability and commercial expectations at:

? [email protected]

? +91 97714 95587

? Zentroverse Global Pvt. Ltd.

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📌 Voip Engineer (Patna)
🏢 ZENTROVERSE GLOBAL PRIVATE
📍 Patna