Sr. VOIP Developer – VoIP & Telephony Engineering
Location: Remote
Employment Type: Full-Time
Shift: Flexible / As per business requirement
About the Role
We are looking for a highly skilled Sr. VOIP Developer with strong hands-on experience in Asterisk, FreeSWITCH, SIP-based telephony systems, and open-source dialer ecosystems. The ideal candidate will be responsible for the configuration, customization, deployment, troubleshooting, and optimization of VoIP infrastructure and communication platforms.
This role requires deep technical expertise in PBX systems, dialplan/XML programming, IVR design, call center solutions, and SIP server technologies such as Kamailio and OpenSIPS.
Key Responsibilities
- Configure, deploy, maintain, and troubleshoot Asterisk / FreeSWITCH based VoIP systems
- Perform Asterisk / FreePBX data migration, upgrades, and system optimization
- Develop and manage Dialplans, XML-based call flows, and telephony logic
- Design and implement IVR / IVRS solutions, auto-reminder systems, and voice broadcasting setups
- Build and support call center environments, conference bridges, inbound/outbound calling systems, and routing logic
- Work on AGI scripting and telephony automation to improve system efficiency
- Configure and manage SIP trunking, call routing, failover, and voice quality optimization
- Deploy, maintain, and troubleshoot open-source dialer platforms such as VicidialNow and OSDial
- Support and optimize Kamailio / OpenSIPS based SIP routing and proxy environments
- Work with WebRTC, voice logger systems, and real-time communication solutions
- Monitor VoIP infrastructure performance and proactively resolve service issues
- Collaborate with development and operations teams for integrations, deployments, and enhancements
- Manage Linux-based servers and support backend telephony applications
- Maintain system security, uptime, backups, and documentation
Required Skills & Technical Expertise
Core VoIP / Telephony
Strong hands-on experience with:
Asterisk | FreeSWITCH | SIP / VoIP | Dialplan Programming | XML Programming | AGI Scripting | IVRS / IVR Design | Call Center Setup |
Conference Systems | Voice Broadcasting | Auto Reminder Systems | Voice Logger | SIP Proxy / Routing
Working knowledge of:
Kamailio | OpenSIPS | Dialer / Open Source Support
Experience with:
VicidialNow | OSDial | ASTPP Billing Software | Development / Scripting |
Familiarity with:
Lua | Perl | PHP | Node.js | Erlang | CURL | memcache | Infrastructure / Systems
Strong understanding of:
Linux System Administration | LAMP Stack | WebRTC | RabbitMQ | Database Administration
Database experience preferred:
Oracle / OCP Certified is an added advantage
Why Adit?
We are a fast-paced organization in a phase of sustained, strategic scale and expansion.
We offer remote opportunities with Flexible work schedules for better work-life balance.
Group of 700+ Agile, Smart, and Dynamic IT Professionals.
Supportive and collaborative work environment.
Great working and learning environment
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