{"id":1227531,"url":"https://alion.io/job/the-seo-byte-telephony-engineer","title":"Telephony Engineer","company":{"id":3800305,"name":"The Seo Byte","domain":"theseobyte.in","url":"https://alion.io/company/the-seo-byte","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"middle","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Gurgaon, India"],"countries":["IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":15000,"max_usd":31000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":10},"experience_years_min":4,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"CentOS Stream","optional":false},{"name":"CI/CD","optional":false},{"name":"GCP","optional":false},{"name":"JavaScript","optional":false},{"name":"Linux","optional":false},{"name":"Lua","optional":false},{"name":"MySQL","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Python","optional":false},{"name":"Rest API","optional":false},{"name":"Speech Recognition","optional":false},{"name":"SQL","optional":false},{"name":"Tcpdump","optional":false},{"name":"Text-to-Speech","optional":false},{"name":"Ubuntu","optional":false},{"name":"WebRTC","optional":false},{"name":"WebSockets","optional":false}],"status":"live","first_seen_at":"2026-09-24T05:01:18Z","employer_posted_date":null,"last_verified_at":"2026-09-24T05:01:18Z","board_verified":false,"closed_at":null,"days_open":12,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":12},"description":"Roles & Responsibilities:\n\nWe are looking for a FreeSWITCH Implementation Engineer who will be responsible for designing, deploying, configuring, integrating, and maintaining FreeSWITCH-based VoIP platforms. The role involves working closely with SIP, RTP, WebRTC, IVR, conferencing, call routing, and external integrations in a production environment.\n\nKey Responsibilities:\n\nFreeSWITCH Core Responsibilities:\n\n- Install, configure, and maintain FreeSWITCH in production environments from the scratch.\n\n- Design and implement call flows, dialplans, IVRs, conferencing, and call routing with complete ownership.\n\n- Configure SIP profiles (internal/external), gateways, trunks, and extensions.\n\n- Implement multi-tenant and high-availability FreeSWITCH architectures.\n\nSIP, RTP & Networking:\n\n- Strong understanding of SIP signaling, RTP media, and SDP negotiation.\n\n- Troubleshoot one-way audio, no-audio, call drops, registration failures.\n\n- Configure NAT traversal, firewall rules, and RTP port ranges.\n\n- Analyze SIP logs and traces (siptrace, sngrep, tcpdump).\n\nDialplan & Scripting:\n\n- Develop dialplans using XML and Lua / JavaScript / Python.\n\n- Implement logic for call queues, time-based routing, skill-based routing, and failover/fallback handling.\n\nIntegrations & APIs:\n\n- Integrate FreeSWITCH with CRM/ERP systems, billing platforms, AI voice bots (ASR/TTS), and external WebSocket or REST services.\n\n- Use Event Socket Library (ESL) for inbound/outbound real-time call control and monitoring.\n\nWebRTC & Media:\n\n- Configure WebRTC support (DTLS-SRTP, ICE, OPUS), mod_verto, and SIP over WSS.\n\n- Implement browser-based calling solutions.\n\nMonitoring & Debugging:\n\n- Monitor system performance, call quality, logs, and CDRs.\n\n- Optimize codec usage and RTP performance.\n\n- Handle live production incidents and RCA.\n\nDeployment & Operations:\n\n- Deploy FreeSWITCH on Linux (CentOS / Ubuntu) and cloud platforms (AWS / GCP / Azure).\n\n- Configure HA, load balancing, and scaling.\n\n- Work with DevOps teams for CI/CD, backups, and automation.\n\nIdeal Candidate:\n\n- 4+ years of experience, with at least 3+ years of hands-on experience implementing, configuring, and supporting FreeSWITCH in production.\n\n- Strong hands-on knowledge of VoIP technologies (SIP, RTP, RTCP, SDP, WebRTC).\n\n- Proficiency in Linux administration, SQL (MySQL/PostgreSQL), and debugging tools (fs_cli, sngrep, tcpdump).\n\n- Immediate joiners or those available within 15 days are highly preferred.\n\nSkills\nFreeSWITCH, VoIP, SIP, RTP, WebRTC, Linux, IP Telephony","description_format":"text","description_chars":2541,"description_truncated":false,"requirements":{"experience_years_min":4,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-09-25T13:06:44Z"}],"visa":[],"liveness":{"score":71,"band":"hot","label":"Hiring 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