Technology Operation Engineer

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Technology Operation Engineer

IN&VAS Engineering

Department:Technology Operation/IN&VAS Engineering
Reports To:Senior Technology Operations Manager

Job Summary

TheTechnology OperationEngineeris 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 theHost MNOA2P SMS partners andIT applications (BCRM Billing Mediation Self-Care) while ensuring full regulatory compliance and timely customer complaint resolution.

Key Responsibilities

Operations & Maintenance

• Operate monitor and maintain IN/VAS OCS PCRF STP SBC SMSCIVRSIM/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 executesystem upgrades patches and security fixesin close coordination withvendor system support teams ensuring proper testing rollback plans and minimal service impact during maintenance windows.

OCS Rating Tariffs Offers & Promotions

• Operate and configure theOnline Charging Systemfor real-time prepaid/converged charging.

• Definerating logic tariff plans rate tables and zone/time-based chargesfor voice SMS data and roaming.

• Design and manageoffers bundles add-ons promotions loyalty rewards and recharge bonuses.

• Configure service classes accumulators counters and Diameter Gy/Gx/Rxinterfaces.

• Ensurecharging accuracy and zero revenue leakage; support CDR/EDR analysis and dispute resolution.

PCRF / Policy Control

• Configure and maintainPCRF/PCFpolicies for QoS FUP throttling and service-based control.

• ManageGx Gy Rx Sy Sdinterfaces 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 theSMSCfor P2P A2P and MO/MT messaging.

• Onboard and manageA2P partners and aggregatorsvia SMPP (binds throttling routing whitelisting).

• ImplementSMS firewallpolicies to block grey routes spam and smishing.

• Ensure A2P revenue protection partner SLA compliance and SMS KPI monitoring.

Signaling (STP) & SBC

• Operate theSTPsystem for SS7/SIGTRAN routing; manage point codes linksets and GTT.

• OperateSBCplatforms 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

• ManageSIM/eSIM/OTAplatformsfor profile creation provisioning and lifecycle operations.

• Operate theVoucher Management Systemfor voucher generation distribution redemption and reconciliation including e-Top-Up integration.

IT Applications Integration

• Integrate IN/VAS/OCS/PCRF/SMSC/SIM/VMS platforms withBCRM Billing Mediation ERP Self-Care.

• Maintainreal time triggers and file export to external systems like Notifiation application and and mediation systemsensuring data consistency and transaction integrity.

Host MNO Coordination

• Act as thetechnical focal point with the Host MNOfor 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.

Project & Change Management

• 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.

Customer Complaint Resolution

• Investigate and resolvecustomer complaintsrelated 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.

Regulatory & Compliance

• Ensure full compliance withregulatory requirementscovering charging accuracy SIM KYC A2P SMS lawful interception and data privacy.

• Submit timely regulatory reports and support internal/external audits.

• Implement mandated regulatory changes promptly.

Performance Documentation & Support

• Monitor KPIs (charging accuracy policy enforcement SMS delivery call quality SIM activation voucher redemption).

• Maintain network documentation configuration records tariff/offer catalogs and RCAs.
• Provide L2/L3 support to NOC customer care IT and revenue assurance teams; collaborate with vendors for escalations.

Qualifications

Education & Experience

• Bachelors Degree in Telecommunications Electronics or Computer Engineering.

• 35 years of hands-on experience with IN/VAS OCS PCRF STP SBC SMSCIVRSIM/eSIM and VMS platforms.

• Experience withOCS rating/offer/promotion designPCRF policy configuration andA2P/SMPP partner integration.

• Prior experience coordinating with a Host MNO and integrating with IT systems (BCRM Billing) is highly desirable.

Technical Skills

• Strong expertise inIN architecture OCS/OFCS PCRF/PCF SMSC STP SBC SIM/eSIMIVRand VMS.

• Solid knowledge ofSS7 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 inLinux/Unix shell scripting and databases (Oracle MySQL).

• Strong understanding ofAPI 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 with5G CCS/PCF GSMA eSIM/RSP SMS firewall and automation (Python DevOps).

Working Conditions

Office-based with data center visits 24/7 on-call rotation and flexibility for maintenance windows.

Key Performance Indicators (KPIs)

• Platform availability 99.9% and SLA compliance for incidents and complaints.

• Timely launch of tariffs offers and promotions with full charging accuracy.

• PCRF policy enforcement success and data session quality.

• SMS delivery success and A2P partner SLA compliance.

• Successful SIM/eSIM activation voucher redemption and VoLTE call quality (MOS ASR NER).

• Full regulatory compliance and effective host MNO/IT integration.

What we offer:

• Rapid learning opportunities - we enable learning through flexible career paths exposure to challenging & meaningful work that will help build and strengthen your expertise.
• Hybrid work environment - flexibility to work from home 2 days a week in our UAE & Pakistan offices.
• Healthcare and other local benefits offered in market.

By submitting your application you acknowledge and consent to the use of Greenhouse & BrightHire during the recruitment process. This may include the storage and processing of your data on servers located outside your country of residence. For further information please contact us at