Job Title: Network Operations Center (NOC) Engineer Messaging & SMS Infrastructure

Department: Telecom Network Operations / CPaaS Infrastructure

Employment Type: Full time (24/7 Rotational Shifts)

Qualifications & Experience

Education: Bachelors Degree in Telecommunications, Computer Science, or Electronics Engineering.

Experience: 4-8 years of dedicated hands-on experience inside a telecom NOC, CPaaS provider, SMS aggregator hub, or mobile operator gateway.

Role Summary:

The Messaging NOC Operations Engineer monitors, supports, and optimizes high-volume, international A2P (Application-to-Person), P2P (Person-to-Person), and A2A (Application-to-Application) SMS routing platforms. You will handle real-time traffic analysis, troubleshoot interconnect issues across SMSCs using SMPP and SS7/SIGTRAN protocols, manage global telecom vendor SLAs, and mitigate message delivery anomalies or telecom fraud.

Key Responsibilities

1. Infrastructure & Traffic Monitoring

Real-Time Surveillance: Monitor global text traffic, network stability, and critical delivery alerts using advanced SMS hub monitoring tools.

KPI Tracking: Analyze performance indicators like Delivery Receipt (DLR) ratios, message latency, throughput (SMS/sec), and delivery failure rates.

Traffic Classification: Supervise complex data flows across A2P (e.g., OTPs, alerts), P2P (inter-subscriber), and A2A message structures.

2. Protocol Maintenance & Troubleshooting

SMPP Session Control: Provision, manage, and audit direct SMPP (v3.4/v5) binds (Transmitter, Receiver, Transceiver) with aggregators and enterprise customers.

Signaling & SS7 Layer: Diagnose core signaling layer traffic including SS7/SIGTRAN (M3UA, SCCP, TCAP,



MAP) for Mobile Terminated (MT) and Mobile Originated (MO) message flows.

Packet Analysis: Run packet captures via Wireshark and tcpdump to identify connection drops, malformed Protocol Data Units (PDUs), and network response errors.

3. Routing Optimization & Vendor Relations

LCR Optimization: Modify SMSC configuration scripts to enforce Least Cost Routing (LCR) strategies alongside optimal quality paths based on MCC/MNC codes.

Incident & SLA Governance: Open, manage, and escalate Trouble Tickets (TT) with Mobile Network Operators (MNOs) and clearinghouses during service disruptions.

Fraud & Anti-Spam Control: Detect and block artificial inflation of traffic (AIT), bypass grey-routing, phishing runs, and illegal SMS spam signatures.

Required Technical Skills

SMS Protocols: Advanced proficiency in SMPP 3.4/5.0, GSM MAP, and HTTP/REST SMS Gateway APIs.

Telecom Signaling: Solid grasp of SS7, SIGTRAN, SCTP, and HLR lookup mechanisms.

Networking Foundations: Comprehensive understanding of IP routing, TCP/IP sequencing, VPN tunnels, and DNS mapping.

Operating Systems: Comfortable working within Linux/Unix command-line interfaces for log parsing (grep, awk, sed).

Data Encodings: Familiarity with telecom payload types (GSM 03.38, UCS-2 binary SMS, and multi-part concatenated messaging).

Do Share your updated profile with the below details ASAP.

24/7 rotational shift 5 Days WFO Hyderabad

Experiences in: VAS / SMS / SMSC / SMPP / P2P/ P2A/ A2P/ SIP / NOC / SIP/ SS7:

CTC:

Exp CTC:

Notice Period :

Current Location:

Relocation to Hyderabad :

LWD:

Offer in Hand:

Thanks & Regards,

Rajesh |

eMail: [email protected]

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