PHP Developer – Telecom & VoIP Systems

Filled
February 28, 2026
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Job Description

🏢 Company

Phonon Communications Private Limited

Phonon is a leading enterprise telephony automation company in India, offering advanced communication solutions powered by AI and telecom infrastructure.

🏆 Recognitions:

  • Deloitte Technology Fast 50 India Winner (2016)
  • Red Herring Top 100 Asia Winner (2016)
  • Recognized by CIOReview as one of India’s most promising Unified Communications companies

Phonon builds enterprise-grade telecom solutions that automate customer interactions across banking, airlines, hospitality, finance, and more.

💼 Role Overview

Are you hands-on with Asterisk, FreePBX, FreeSWITCH, Vicidial?
Do terms like AGI, IVR, VoIP, SIP, WebRTC excite you?

If you love scaling telecom systems to the cloud and building hosted telephony applications, this role is for you.

This is a high-responsibility position within the Hosted Telephony Technology Services Team, where you’ll manage telecom software systems, databases, and scalable voice platforms.

🔧 Key Responsibilities

  • Install, configure, optimize, and maintain telecom infrastructure:
    • Asterisk
    • FreePBX
    • Vicidial
    • FreeSWITCH
  • Develop IVR applications using:
    • Asterisk-Java
    • AGI
    • Proprietary IVR tools
  • Write scalable and maintainable telecom software using:
    • PHP (Essential)
    • Asterisk scripting
    • Java
    • Python
  • Develop and maintain WebRTC applications
  • Manage STUN/TURN servers for real-time communication
  • Design telecom solutions for enterprise clients
  • Troubleshoot SIP sessions, VoIP systems, and IVR flows
  • Build and maintain:
    • Billing & rating systems
    • Web-based configuration panels
    • Reporting dashboards
  • Monitor system performance and proactively resolve issues

🎓 Education

  • Diploma / UG:
    • B.Tech / B.E. (Computers, Electrical, Electronics, Telecommunication)
  • PG:
    • M.Tech (Computers / Electronics / Telecom)
    • MCA
  • Doctorate: Not Required

👨‍💻 Experience Required

  • 2–4 years of experience in:
    • Asterisk (AGI mandatory)
    • PHP (Essential)
    • WebRTC (Preferred)

🛠 Required Technical Skills

  • Strong telecom fundamentals
  • Hands-on experience in:
    • VoIP
    • SIP session management
    • IVR systems
    • Asterisk
    • FreePBX
    • FreeSWITCH
    • Vicidial
  • Scripting in PHP & AGI
  • Understanding of:
    • TCP/IP ports
    • Telecom application architecture
    • SQL replication
    • Database management

➕ Nice to Have

  • Advanced Java knowledge
  • Cloud deployment experience
  • Large-scale system architecture exposure

🌟 Why Join Phonon?

  • Work on enterprise-grade telecom systems
  • Exposure to AI-powered customer interaction automation
  • Opportunity to solve real-world telecom scaling challenges
  • Work with major Indian enterprises in banking, airlines, hospitality, and fintech
  • Innovative, fast-paced environment

🏦 Clients Include

Phonon serves leading organizations such as:

  • Citibank
  • HDFC Bank
  • Axis Bank
  • Yes Bank
  • American Express
  • Air India
  • IndiGo
  • ITC Hotels

…and many more across banking, aviation, travel, and hospitality sectors.

🚀 Ideal Candidate

You are:

  • Passionate about telecom technology
  • Curious about how VoIP systems work under the hood
  • Comfortable debugging SIP sessions and IVR flows
  • Persistent, creative, and solution-driven
  • Excited to take telecom infrastructure to the cloud