Senior NOC Engineer

ADIT; Ahmedabad District; On-site; INR 1,500,000 - 2,700,000; Full time

Job summary

ADIT is seeking a Senior NOC Engineer to join our 24/7 Network Operations Center. You will lead real-time monitoring, incident triage, and runbook remediation for a high-concurrency VoIP PBX platform in Google Cloud.

You will manage Kamailio edge proxies, FreeSWITCH media engines, and PostgreSQL databases, coordinating Tier-3 escalations as needed. The role emphasizes hands-on troubleshooting, proactive health checks, and robust communication with engineering and customer-facing teams.

Qualifications

• 6–8 years in a 24x7 technical operations center with VoIP focus.
• Hands-on config/log analysis of Kamailio/OpenSIPS and FreeSWITCH/Asterisk.
• Strong SIP signaling, RFCs, SDP, RTP/RTCP understanding.
• GCP Compute Engine, VPC, firewall, L4 Load Balancers, static IPs.
• PostgreSQL (Cloud SQL) performance and connection management (PgBouncer).
• Observability tools: Homer, Wireshark, sngrep, Prometheus, Grafana.
• Experience with PagerDuty, Opsgenie, Jira, Slack integrations.
• Calm under pressure; strong communication; mentoring.

Responsibilities

• 24/7 Eyes-on-Glass Monitoring: monitor health dashboards across Grafana, GCP Cloud Monitoring, Homer.
• Incident Triage & Response: Tier 2 responder; classify incidents from P1 to P5.
• Runbook Execution & Remediation: execute runbooks to resolve VoIP faults.
• VoIP Media Quality Analysis: troubleshoot jitter, packet loss, MOS degradation.
• Carrier Interconnect Monitoring: manage static IP carrier trunks; troubleshoot SIP 401/403 or 503.
• Escalation & Collaboration: gather traces and context to escalate to Tier 3 teams.
• Leadership & Mentorship: shift lead; mentor junior NOC operators.

Skills

VoIP & SIP expertise

GCP Cloud Infra

PostgreSQL / Cloud SQL

Incident management

Network monitoring

Leadership & mentorship

Strong communication

Tools

Kamailio/OpenSIPS

FreeSWITCH/Asterisk

Homer SIPcapture

Grafana

Prometheus

Wireshark

sngrep

PgBouncer

PostgreSQL (Cloud SQL)

Job description

We are looking for a highly skilled Senior NOC Engineer with 6 to 8 years of experience to join our 24/7 Network Operations Center. In this role, you will be the second-line anchor for a high-concurrency production VoIP PBX platform.

You will be responsible for real-time proactive monitoring, incident triage, and runbook remediation of our real-time communication (RTC) stack. This includes managing Kamailio edge proxies, FreeSWITCH media engines, and PostgreSQL databases, all running on Google Cloud Platform (GCP) Compute Engine VMs with dedicated static IP carrier trunks. You will manage P1/P2 alerting flows, coordinate tier-3 engineering escalations, and protect core telephony uptime.

• 24/7 Eyes-on-Glass Monitoring: Proactively monitor platform health dashboards across Grafana, GCP Cloud Monitoring, and Homer (SIPcapture) to detect signaling drops, media quality degradation, or infrastructure bottlenecks.
• Incident Triage & Response: Act as the Tier 2 technical first responder for platform alerts. Accurately classify incidents vs. outages according to business logic (P1 to P5 matrix).
• Runbook Execution & Remediation: Execute specialized technical runbooks to resolve complex VoIP faults (e.g., clearing stuck SIP registrations, flushing PgBouncer connection pools, safely draining/bypassing misbehaving FreeSWITCH instances).
• VoIP Media Quality Analysis: Troubleshoot voice quality spikes (Jitter >50ms, Packet Loss >2%) and analyze Mean Opinion Score (MOS) degradation using Homer SIP ladder diagrams.
• Carrier Interconnect Monitoring: Manage links tied to static public IP carrier trunks. Monitor SIP OPTIONS pings and immediately troubleshoot authentication issues (SIP 401/403) or error loops (SIP 503).
• Escalation & Collaboration: Gather raw packet traces (sngrep / Wireshark) and technical context during major incidents to smoothly elevate unresolved issues to Tier 3 DevOps, VoIP Core, or Database Engineers.
• Leadership & Mentorship: Act as the Shift Lead during critical hours, mentoring junior NOC operators, managing incident communication channels, and refining technical runbooks.

Technical Requirements & Qualifications

• Experience: 6 to 8 years in a 24x7 technical operations center environment, with a heavy emphasis on VoIP, SIP Signaling, and Cloud Infrastructure.
• VoIP Stack Expertise: Direct, hands-on experience troubleshooting and managing Kamailio (or OpenSIPS) and FreeSWITCH (or Asterisk) configurations and logs.
• Protocol Proficiency: Deep understanding of SIP signaling, RFC standards, SDP negotiation, and RTP/RTCP media streaming behaviors.
• Cloud Platform Skills: Strong proficiency with Google Cloud Platform (GCP) core services, specifically Compute Engine Virtual Machines (VMs), VPC Networking, Cloud Firewall, Layer 4 Network Load Balancers, and Static External IP architectures.
• Database Foundations: Competence working with PostgreSQL (specifically Cloud SQL environments); ability to analyze active connection volumes, understand PgBouncer states, and identify query blockages during high call volume.
• Observability Tools: Hands-on experience navigating Homer (SIPcapture), Wireshark, sngrep, Prometheus, and Grafana alert configurations.
• Tooling: Familiarity with Incident Management systems such as PagerDuty, Opsgenie, Jira Service Desk, and Slack integrations.
• Calm Under Pressure: Proven ability to handle live, high-stress P1 Critical Outage scenarios with structure and focus.
• Clear Communicator: Strong verbal and written English communication skills to act as a bridge between technical engineering pods and customer-facing support teams.
• Problem Solver: Analytical mindset capable of isolating a network hop failure vs. a software application core dump.