Information Technology Operations Engineer

Department: Technology Operation / IN&VAS Engineering

Reports To: Senior Technology Operations Manager

The Technology Operation Engineer is responsible for the design, deployment, operation, and maintenance of Intelligent Network (IN) and Value-Added Services (VAS) platforms, including OCS, PCRF, STP, SBC, SMSC, SIM/eSIM management, and Voucher Management Systems (VMS). The role ensures high availability, charging accuracy, and seamless integration with the Host MNO
, A2P SMS partners
, and IT applications (BCRM, Billing, Mediation, Self‑Care), while ensuring full regulatory compliance and timely customer complaint resolution.

• Operate, monitor, and maintain IN/VAS, OCS, PCRF, STP, SBC, SMSC, IVR, SIM/eSIM, and VMS platforms.
• Perform health checks, preventive maintenance, backups, and incident resolution within SLA.
• Manage alarms, traces, and logs to proactively detect service‑impacting issues.
• Plan and execute system upgrades, patches, and security fixes in close coordination with vendor system support teams
  , ensuring proper testing, rollback plans, and minimal service impact during maintenance windows.

• Operate and configure the Online Charging System for real‑time prepaid/converged charging.
• Define rating logic, tariff plans, rate tables, and zone/time‑based charges for voice, SMS, data, and roaming.
• Design and manage offers, bundles, add‑ons, promotions, loyalty rewards, and recharge bonuses
  .
• Configure service classes, accumulators, counters, and Diameter Gy/Gx/Rx interfaces.
• Ensure charging accuracy and zero revenue leakage
  ; support CDR/EDR analysis and dispute resolution.

• Configure and maintain PCRF/PCF policies for QoS, FUP, throttling, and service‑based control.
• Manage Gx, Gy, Rx, Sy, Sd interfaces with PGW, OCS, and IMS.
• Implement use cases such as zero‑rated services, sponsored data, and dynamic QoS.

• Operate and maintain the SMSC for P2P, A2P, and MO/MT messaging.
• Onboard and manage A2P partners and aggregators via SMPP (binds, throttling, routing, whitelisting).
• Implement SMS firewall policies to block grey routes, spam, and smishing.
• Ensure A2P revenue protection, partner SLA compliance, and SMS KPI monitoring.

• Operate the STP system for SS7/SIGTRAN routing; manage point codes, linksets, and GTT.
• Operate SBC platforms for SIP/VoLTE/IMS security, codec handling, fraud prevention, and call quality.
• Coordinate signaling and SIP interconnection with the host MNO and external partners.

• Manage SIM/eSIM/OTA platforms for profile creation, provisioning, and lifecycle operations.
• Operate the Voucher Management System for voucher generation, distribution, redemption, and reconciliation, including e‑Top‑Up integration.

• Integrate IN/VAS/OCS/PCRF/SMSC/SIM/VMS platforms with BCRM, Billing, Mediation, ERP, Self‑Care
  .
• Maintain real time triggers and file export to external systems like Notifiation application and and mediation systems ensuring data consistency and transaction integrity.

• Act as the technical focal point with the Host MNO for all IN/VAS, signaling, charging, SMS, and IMS matters.
• Coordinate integration, testing, change management, and joint troubleshooting.
• Manage technical SLAs, interface agreements, and operational reviews with the host operator.

• Participate in upgrades, migrations, capacity expansions, and new node integrations.
• Prepare MOPs, perform impact analysis, and execute changes during maintenance windows.
• Conduct end-to-end testing and acceptance of new services.

• Investigate and resolve customer complaints related to charging, offers, data policy, SMS, voice quality, SIM/eSIM, and vouchers within defined SLAs.
• Perform RCA, implement permanent fixes, and coordinate with customer care, IT, and the host MNO.

• Ensure full compliance with regulatory requirements covering charging accuracy, SIM KYC, A2P SMS, lawful interception, and data privacy.
• Submit timely regulatory reports and support…