Telephony Developer

3 weeks ago

Pune, India IMR Soft LLC Full time

We are seeking a highly passionate and skilled Core Telephony Developer to join our team in Pune.The ideal candidate will be an immediate joiner eager to build and maintain cutting-edge Real-Time Communication (RTC) systems and voice platforms.You will be instrumental in ensuring the performance, quality, and security of our carrier-grade communication infrastructure.Key Responsibilities : - Design and Development : Architect, develop, test, and maintain robust, scalable, and high-performance RTC systems and core voice platforms.- System Ownership : Take full ownership of key layers, including SIP signaling, media handling (RTP), and session control.- Optimization : Continuously monitor and optimize system performance, focusing on minimizing latency, maximizing call quality, and ensuring reliable service delivery across both cloud and on-premise deployments.- Security & Reliability : Implement and enforce rigorous security measures for communication infrastructure and collaborate closely with Site Reliability Engineering (SRE) and Product teams to achieve carrier-grade reliability and availability.- Collaboration : Work cross-functionally with QA, Product Managers, and other engineering teams to define requirements, troubleshoot issues, and deliver innovative communication features.- Troubleshooting : Act as an escalation point for complex production issues related to telephony core components, ensuring rapid resolution.Required Skills (Must-Have) : - Deep Expertise in SIP : Extensive hands-on experience with the Session Initiation Protocol (SIP), including message flow, various headers, error handling, and related protocols.- FreeSWITCH Mastery : Expert-level knowledge and development experience with FreeSWITCH (or similar platforms like Asterisk), including module development, configuration, dialplan scripting, and application integration.- Node.js Proficiency : Strong development skills in Node.js for building high-concurrency, event-driven back-end applications and microservices that interface with telephony core.- Core Telephony Concepts : Solid understanding of telephony fundamentals, including codecs, QoS, NAT traversal, and security protocols (SRTP/TLS).- Networking : Strong foundation in TCP/IP networking and common routing protocols relevant to real-time communications.Highly Recommended Skills : - Kamailio/OpenSIPS : Proven experience with Kamailio (or OpenSIPS) for high-scale SIP proxying, load balancing, and routing.- RTP Engine : Hands-on experience with RTP Engine (or similar media proxy/relay solutions) for efficient media handling and firewall traversal.- Database : Experience with relational (e.g., PostgreSQL, MySQL) and/or NoSQL databases.Nice to Have : - Additional Languages : Experience with Python and/or Go (Golang) for tooling, scripting, or service development.- Cloud Infrastructure : Familiarity with deploying and managing telephony components on cloud platforms (AWS, Azure, or GCP).- Containerization : Experience with Docker and Kubernetes.Education and Experience : - Experience : 5 to 8 years of dedicated experience in developing and deploying core telephony or real-time communication systems.- Education : Bachelors or Masters degree in Computer Science, Engineering, or a related field, or equivalent practical experience (ref:hirist.tech)

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