Telephony Engineer (FreeSWITCH, VoIP ) at Staffnixcom · Gurugram · 4 - 10 years · ₹17L - ₹25L / yr · Bootstrapped · Posted 3 Aug 2026
Strong FreeSWITCH Implementation Engineer Profiles
2
Mandatory (Experience 1) – Must have minimum 4+ years experience, with at least 3+ years of hands-on experience implementing, configuring, and supporting FreeSWITCH in production environments.
3
Mandatory (Experience 2) – Must have strong experience in designing and implementing FreeSWITCH call flows, including dialplans, IVRs, call routing, conferencing, SIP profiles, gateways, trunks, and extensions with end-to-end ownership.
4
Mandatory (Experience 3) – Must have strong hands-on knowledge of VoIP technologies, including SIP, RTP, RTCP, SDP, WebRTC, and should be capable of troubleshooting call drops, one-way audio, registration failures, NAT traversal, and SIP/RTP-related issues.
5
Mandatory (Experience 4) – Must have hands-on experience developing FreeSWITCH dialplans using XML and at least one scripting language such as Lua, JavaScript, or Python, including implementation of call queues, time-based routing, skill-based routing, and failover logic.
6
Mandatory (Experience 5) – Must have experience integrating FreeSWITCH with CRM/ERP systems, REST APIs, WebSockets, AI Voice Bots (ASR/TTS), or Billing Platforms, along with hands-on experience using Event Socket Library (ESL) for real-time call control.
7
Mandatory (Experience 6) – Must have strong Linux administration experience and should be comfortable deploying and managing FreeSWITCH on Ubuntu/CentOS, along with debugging using fs_cli, sngrep, tcpdump, and working with SQL (MySQL/PostgreSQL) for CDRs and reporting.
8
Mandatory (Notice Period) – Immediate Joiners or candidates who can join within 15 days will be highly preferred.
9
Mandatory (Location) - Mandatory (Location) – Candidate must be currently based in Delhi NCR only
10
Preferred (Experience 1) – Experience with AWS, Azure, or GCP, High Availability (HA), Load Balancing, CI/CD pipelines, automation, backups, and scalable FreeSWITCH deployments.
11
Preferred (Experience 2) – Experience implementing WebRTC-based calling solutions, including mod_verto, SIP over WSS, DTLS-SRTP, ICE, and OPUS codec configuration.
Shubham Vishwakarma
Full Stack Developer - Averlon
About Staffnixcom
About
Company social profiles
Similar jobs (2)
The recruiter has not been active on this job recently. You may apply but please expect a delayed response.
WE ARE HIRING | PROJECT MANAGER – VOIP TECHNOLOGIES
Position: Project Manager
Industry: IT Services / VoIP Technologies
Experience: 6–12 Years
Location: Ahmedabad | Work from Office
We are looking for a Technical Project Manager with a strong hands-on technical background in VoIP Development
.
KEY RESPONSIBILITIES
• Manage end-to-end VoIP implementation projects from initiation through deployment and post-implementation support.
• Gather business and technical requirements and translate them into actionable project plans.
• Prepare project schedules, milestones and resource allocation plans.
• Coordinate with Development, QA, DevOps, Support and Infrastructure teams.
• Track project progress and ensure timely delivery.
• Conduct project kickoffs, status meetings and client review meetings.
• Identify project risks and develop mitigation strategies.
• Manage scope changes and maintain project documentation, reports and dashboards.
• Coordinate UAT and production rollout.
• Manage timelines, budgets and resource utilisation.
• Communicate project status to clients and internal stakeholders.
• Support pre-sales through effort estimation and project planning.
MANDATORY TECHNICAL EXPERIENCE
Hands-on experience in VoIP/Telecom with strong knowledge of:
• FreeSWITCH
• Asterisk
• Kamailio
• OpenSIPS
• SIP
• RTP
• WebRTC
• SBC
• IP Telephony
• Linux
• TCP/IP, NAT, Firewalls and Networking
ADDITIONAL SKILLS
• Agile / Scrum methodologies
• Project planning and scheduling
• Risk and resource management
• Client and stakeholder management
• UAT and production deployment
• Vendor coordination
• International client handling
• AWS / Azure / GCP exposure is an advantage
• REST API integration knowledge is an advantage
• PMP / PRINCE2 / CSM certification preferred
The recruiter has not been active on this job recently. You may apply but please expect a delayed response.
Python
NodeJS (Node.js)
Go Programming (Golang)We’re building a powerful, AI-driven communication platform — a next-generation alternative to RingCentral or 8x8 — powered by OpenAI, LangChain, and SIP/WebRTC. We're looking for a Full-Stack Software Developer who’s passionate about building real-time, AI-enabled voice infrastructure and who’s excited to work in a fast-moving, founder-led environment.
This is an opportunity to build from scratch, take ownership of core systems, and innovate on the edge of VoIP + AI.
What You’ll Do
- Design and build AI-driven voice and messaging features (e.g. smart IVRs, call transcription, virtual agents)
- Develop backend services using Python, Node.js, or Golang
- Integrate OpenAI, Whisper, and LangChain with real-time VoIP systems like Twilio, SIP, or WebRTC
- Create scalable APIs, handle call logic, and build AI pipelines
- Collaborate with the founder and early team on product strategy and infrastructure
- Participate in occasional in-person strategy meetings (Delhi, Bangalore, or nearby)
Must-Have Skills
- Strong programming experience in Python, Node.js, or Go
- Hands-on experience with VoIP/SIP, WebRTC, or tools like Twilio, Asterisk, Plivo
- Experience integrating with LLM APIs, OpenAI, or speech-to-text models
- Solid understanding of backend design, Docker, Redis, PostgreSQL
- Ability to work independently and deliver production-grade code
Nice to Have
- Familiarity with LangChain or agent-based AI systems
- Knowledge of call routing logic, STUN/TURN, or media servers (e.g. FreeSWITCH)
- Interest in building scalable cloud-first SaaS products
Work Setup
- 🏠 Remote work
- 🕐 Full-time role
- 💼 Direct collaboration with founder (technical)
- 🧘♂️ Flexible hours, strong ownership culture
Follow CutshortShubham Vishwakarma
Full Stack Developer - Averlon