Onsite in Ahmedabad, with UK overlap hours. Join one of the UK's most awarded and fastest-growing next-gen VoIP providers, serving a large and rapidly growing base of UK business customers, as they build their new Ahmedabad team.

This is a pure hands-on senior L2 / L3 technical support engineer role, (no software development, DevOps or SRE). It's ideal for experienced VoIP support or voice NOC engineers who troubleshoot SIP/RTP hands-on in Linux and want to be the go-to escalation point.

As the Senior VoIP Support Engineer, you'll own the stability and quality of the company's customers real-time communication platforms. You'll be the escalation point (L2/L3) for complex SIP, media and platform issues, working with customers, NOC and engineering teams to diagnose problems quickly, restore service and prevent repeat incidents.

Required Skills and Experience

- 4+ years in VoIP/telecom support or operations.
- Strong understanding of SIP, SDP, RTP/RTCP, and related protocols and call flows.
- Hands-on experience with at least one of Kamailio, FreeSWITCH, or Asterisk.
- Proficiency with packet analysis tools (Wireshark, sngrep, tcpdump).
- Solid Linux administration skills (CentOS/Debian/Ubuntu), including shell, logs, networking, and services.
- Understanding of NAT, firewalls, TCP/UDP, DNS, and VPN/IPsec in VoIP environments.
- Working knowledge of MySQL/PostgreSQL and basic querying for CDR analysis.
- Experience with monitoring and ticketing tools (Zabbix, Grafana, Prometheus, Nagios, Jira, or Zendesk).
- Strong English, both written and verbal communication, with the ability to handle customer escalations calmly.





Key Responsibilities

- Act as L2/L3 escalation point for VoIP incidents, including call failures, one-way audio, registration problems, poor call quality, and routing issues.
- Troubleshoot SIP signalling and RTP media using packet captures and call tracing (Wireshark, sngrep, tcpdump, HOMER).
- Support and maintain softswitch, SBC, and proxy platforms (Kamailio, OpenSIPS, FreeSWITCH, Asterisk, or similar).
- Monitor platform health and call quality (ASR, ACD, PDD, jitter, packet loss, MOS) and act on alerts proactively.
- Work with carriers and interconnect partners to resolve routing, codec, and signalling issues.
- Own incidents through to closure, including explicit customer updates, RCA reports, and corrective action plans.
- Handle configuration work: trunks, dial plans, number routing, codecs, NAT traversal, and security policies.
- Apply security practices such as fraud detection, rate limiting, ACLs, and TLS/SRTP, and help mitigate toll fraud and SIP attacks.
- Write and maintain runbooks, knowledge-base articles, and SOPs.
- Mentor junior support engineers and review their escalations.
- Give structured feedback to engineering on recurring defects and improvements.
- Available to attend periodic maintenance windows during off-peak hours.

If you bring the skills and experience listed above, we're excited to see your application.

Due to high application volumes, only shortlisted candidates will be contacted - but we genuinely review, appreciate and value every application and wish you the very best in your search. Please follow us for future roles.

📌 Senior VoIP Technical Support Engineer Asterisk / FreeSWITCH Ahmedabad - UK Overlap
🏢 Talent-Hunters
📍 Ahmedabad