Technology Operation Engineer

Technology Operation Engineer

Host MNO

IT applications (BCRM, Billing, Mediation, Self-Care)

Key Responsibilities

• 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.

OCS Rating, Tariffs, Offers & Promotions

• 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.

PCRF / Policy Control

• 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.

SMSC & A2P Partner Management

• 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.

Signaling (STP) & SBC

• 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.

SIM/eSIM & Voucher Management

• Manage
• SIM/eSIM/OTA platforms
• for profile creation, provisioning, and lifecycle operations.
• Operate the

Voucher Management System

IT Applications 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.

Host MNO Coordination

• 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.

& Experience

• Bachelor's Degree in Telecommunications, Electronics, or Computer Engineering.
• 3 5+ years of hands-on experience with IN/VAS, OCS, PCRF, STP, SBC, SMSC, IVR, SIM/eSIM, and VMS platforms.
• Experience with
• OCS rating/offer/promotion design
• ,
• PCRF policy configuration
• , and
• A2P/SMPP partner integration
• .
• Prior experience coordinating with a Host MNO and integrating with IT systems (BCRM, Billing) is highly desirable.

Technical Skills

• Strong expertise in
• IN architecture, OCS/OFCS, PCRF/PCF, SMSC, STP, SBC, SIM/eSIM, IVR and VMS
• .
• Solid knowledge of
• SS7, SIGTRAN, Diameter (Gx/Gy/Rx/Sy/Sd), SIP, SMPP, MAP, CAP, INAP, RTP
• .
• Hands-on experience with major vendors (Huawei, Ericsson, Nokia, ZTE, Oracle, Ribbon, AudioCodes).
• Proficient in

Linux/Unix

• , shell scripting, and databases (Oracle, MySQL).
• Strong understanding of
• API integration
• (REST, SOAP, Kafka, ESB) with IT systems.
• Familiarity with NFV, cloud-native VAS, and monitoring tools (Zabbix, Grafana, ELK) is a plus.

Soft Skills

• Strong analytical, problem-solving, and stakeholder management skills.
• Customer-focused with attention to detail; able to work under pressure and on-call rotations.

Preferred Qualifications

• Vendor certifications (Huawei, Ericsson, Nokia, Oracle Communications).
• Experience with

5g Ccs/Pcf

Working Conditions