Software Developer

Job Title: UCaaS / Software Developer

Role: UCaaS Software Developer

Specialization: VoIP, Unified Communications, SIP, WebRTC, Real-Time Communications

Job Summary: We are seeking an experienced VoIP / UCaaS Software Developer to design, develop, integrate, and maintain scalable Unified Communications as a Service (UCaaS) and real-time communication solutions.

The ideal candidate will have strong hands-on experience with FreeSWITCH, Asterisk, SIP, RTP, WebRTC, Kamailio, OpenSIPS, PJSIP, SBCs, and SIP Trunking, along with programming expertise in Python and/or Node.js. Strong knowledge of Linux, VoIP architecture, SIP signaling, call routing, and real-time communication systems is essential.

Key Responsibilities

● Design, develop, and maintain scalable VoIP and UCaaS solutions.

● Develop and customize telephony applications using FreeSWITCH and Asterisk.

● Implement and troubleshoot SIP, RTP, SDP, WebRTC, and PJSIP technologies.

● Configure and manage SIP routing using Kamailio and OpenSIPS.

● Develop and integrate SBC, softswitch, and SIP trunking solutions.

● Build backend services, APIs, and automation using Python and Node.js.

● Develop and integrate WebRTC-based real-time communication solutions.

● Design call flows, SIP routing, failover, load balancing, and high-availability architectures.

● Troubleshoot SIP signaling, RTP/media, call quality, registration, NAT, and interoperability issues.

● Integrate SIP trunks, telecom carriers, third-party APIs, and communication platforms.

● Deploy, configure, and optimize Linux-based VoIP infrastructure.

● Monitor system performance, reliability, scalability, and security.

● Collaborate with engineering and product teams to deliver new UCaaS and VoIP features.

Required Skills

● Strong hands-on experience with FreeSWITCH and/or Asterisk.

● Strong understanding of SIP, RTP, SDP, and VoIP protocols.

● Practical experience with WebRTC and real-time communications.

● Experience with Kamailio and/or OpenSIPS.

● Knowledge of PJSIP, SIP Trunking, SBCs, and Softswitches.

● Proficiency in Python and/or Node.js.

● Strong knowledge of Linux systems and networking.

● Experience with SIP call routing, signaling, media flows, and troubleshooting.

● Understanding of NAT, firewalls, codecs, SIP registration, and VoIP security.

● Experience building or maintaining scalable and reliable VoIP/UCaaS platforms.

Preferred candidates required

● Experience in UCaaS, CPaaS, cloud telephony, or real-time communication platforms.

● Experience with SIP proxy, registrar, and routing architectures.

● Knowledge of VoIP monitoring, logging, and troubleshooting tools.

● Experience with REST APIs and third-party communication integrations.

● Familiarity with cloud platforms, containers, and distributed systems.

● Understanding of high-availability and carrier-grade VoIP architectures.

Ideal candidates :

We are looking for a technically strong UCaaS / VoIP Software Developer with practical experience in building and supporting real-time communication platforms. The candidate should have a strong understanding of telephony protocols, SIP infrastructure, media handling, VoIP development, and Linux-based systems, with the ability to develop scalable and reliable UCaaS solutions