The Role
Develop and maintain enterprise VoIP and telecom applications using FreeSWITCH, Asterisk, OpenSIPS, Kamailio, and FusionPBX. Build SIP call routing, IVR, conferencing, recording, and telephony solutions; integrate platforms with CRM systems and APIs; troubleshoot signaling, codec, RTP, and networking issues; and optimize scalability, performance, and availability. Collaborate with Product, QA, DevOps, and Support teams on testing, code reviews, documentation, and feature delivery.
Summary Generated by Built In
Company: Elision Technologies Pvt. Ltd.
Job Title: VoIP Developer
Location: Ahmedabad, Gujarat
Experience: 5+ Years
Employment Type: Full-Time
Department: Engineering / Product Development
About the RoleElision Technologies Pvt. Ltd. is looking for an experienced VoIP Developer to develop, customize, and maintain enterprise-grade telecom and unified communication solutions. The ideal candidate should have strong expertise in FreeSWITCH, OpenSIPS, Asterisk, Kamailio, and FusionPBX, along with a solid understanding of SIP-based communication systems and VoIP technologies.
You will work closely with Product, QA, DevOps, and Support teams to build scalable, secure, and high-performance telecom applications for global customers.
Key Responsibilities- Design, develop, and maintain VoIP and telecom applications.
- Configure, customize, and optimize FreeSWITCH, Asterisk, OpenSIPS, Kamailio, and FusionPBX.
- Develop SIP-based call routing, IVR, conferencing, recording, and telephony solutions.
- Integrate VoIP platforms with CRM systems, REST APIs, and third-party applications.
- Troubleshoot SIP, RTP, codec, NAT, and signalling issues.
- Optimize system performance, scalability, and high availability.
- Perform debugging, testing, and code reviews.
- Collaborate with cross-functional teams to deliver new features and product enhancements.
- Prepare technical documentation and follow development best practices.
- Bachelor's degree in Computer Engineering, Information Technology, or a related field.
- 5+ years of experience in VoIP or Telecom Software Development.
- Strong programming skills in C, C++, Python, PHP, or Java.
- Hands-on experience with Linux environments and networking concepts.
- Good understanding of REST APIs, SQL databases, and system integration.
- FreeSWITCH
- OpenSIPS
- Asterisk
- Kamailio
- FusionPBX
- SIP & RTP Protocols
- VoIP & IP Telephony
- WebRTC
- Linux Administration
- REST APIs
- MySQL / PostgreSQL
- TCP/IP & Networking
- Experience with Contact Center Solutions, Predictive Dialers, and Auto Dialers.
- Knowledge of Cloud Telephony, Unified Communications (UC), and IP PBX.
- Experience with Docker, Kubernetes, or cloud platforms.
- Familiarity with AI-powered Voice Bots and speech technologies is an added advantage.
- FreeSWITCH
- OpenSIPS
- Asterisk
- Kamailio
- FusionPBX
- SIP & VoIP
- Work on innovative VoIP, Contact Center, and AI-powered communication products.
- Opportunity to build scalable telecom solutions for global enterprises.
- Collaborative, technology-driven work culture.
- Continuous learning and career growth opportunities.
- Competitive salary and performance-based incentives.
Skills Required
- Bachelor's degree in Computer Engineering, Information Technology, or a related field
- 5+ years of experience in VoIP or telecom software development
- Strong programming skills in C, C++, Python, PHP, or Java
- Hands-on experience with Linux environments and networking concepts
- Understanding of REST APIs, SQL databases, and system integration
- Experience with contact center solutions, predictive dialers, and auto dialers
- Knowledge of cloud telephony, unified communications, and IP PBX
- Experience with Docker, Kubernetes, or cloud platforms
- Familiarity with AI-powered voice bots and speech technologies
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The Company
What We Do
Elision Technologies provides unified telecommunications and omnichannel communication solutions for businesses and government organizations. Its software brings inbound and outbound interactions—including voice, email, chat, WhatsApp, and social media—into a single interface, with tools for contact-center operations, workflow automation, CRM integrations, and AI-based quality monitoring. The company also offers VoIP, PBX, dialer, and telecom implementation and support services, serving customers across multiple industries.
