Subscriber Data Management (SDM) Engineer / Senior Consultant

Job Summary

We are seeking an experienced Subscriber Data Management (SDM) Professional with strong expertise in telecom core network subscriber databases and identity management solutions. The candidate will be responsible for the design, implementation, integration, administration, and support of Nokia SDM platforms, ensuring reliable subscriber authentication, authorization, provisioning, and data consistency across 4G/5G networks.

The ideal candidate should possess deep knowledge of Nokia SDM architecture including HLR, HSS, UDM, AAA, subscriber provisioning systems, and 5G Core subscriber data management functions. Key Responsibilities

Subscriber Data Management Operations

Manage and support Nokia SDM solutions serving as the centralized repository for subscriber information.

Administer subscriber identity data including IMSI, MSISDN, External IDs, and related provisioning records.

Ensure data consistency, synchronization, and integrity across multiple network domains and applications.

Perform subscriber data lifecycle management including creation, modification, migration, and deletion.

Authentication & Authorization

Support subscriber authentication and authorization processes across 4G LTE, 5G, Wi-Fi, and other access networks.

Manage authentication credentials, security profiles, and access permissions.

Troubleshoot authentication failures and service access issues.

Service Provisioning & Integration

Configure and maintain subscriber service profiles, QoS parameters, usage limits, and service entitlements.

Support service activation, modification, suspension, and deactivation activities.

Integrate SDM platforms with network functions such as:

HLR

HSS

UDM

AUSF

AAA

PCRF/PCF





OSS/BSS systems

4G/5G Core Network Support

Support LTE EPC and 5G Core subscriber management functions.

Understand and manage UDM-related subscriber data operations in cloud-native 5G environments.

Participate in migration projects from legacy HLR/HSS architectures to virtualized and cloud-native SDM solutions.

System Administration & Troubleshooting

Monitor platform health, performance, availability, and capacity.

Perform software upgrades, patches, backups, and disaster recovery activities.

Conduct root cause analysis (RCA) for service-affecting incidents.

Ensure high availability and scalability of the SDM environment.

Security & Compliance

Implement security controls for subscriber data access and management.

Ensure compliance with data privacy regulations and operator security policies.

Support audits and regulatory compliance requirements.

Documentation & Support

Prepare operational procedures, implementation guides, and technical documentation.

Collaborate with cross-functional teams including Core Network, OSS/BSS, Provisioning, Security, and Vendor Support teams.

Provide L2/L3 support for SDM-related issues.

Required Technical

Skills

Nokia Platform Expertise

Nokia Subscriber Data Management (SDM)

Nokia HLR/HSS

Nokia UDM

Nokia AAA Solutions

Subscriber Provisioning Platforms

Telecom Domain Knowledge

LTE EPC

5G Core Architecture

IMS

VoLTE





VoWiFi

Subscriber Lifecycle Management

Identity Management

Protocols & Interfaces

Diameter

HTTP/2

REST APIs

LDAP

SOAP/XML

DNS

SIGTRAN (preferred)

Cloud & Virtualization

Virtualized Network Functions (VNF)

Cloud Native Functions (CNF)

Kubernetes (preferred)

OpenStack

VMware

Database & Linux

Linux/Unix Administration

Oracle / PostgreSQL Databases

SQL Queries

Shell Scripting Required Experience

5+ years of experience in Telecom Core Network environments.

3+ years of hands-on experience with Nokia SDM, HSS, HLR, or UDM platforms.

Experience supporting Tier-1 telecom operators is preferred.

Experience in 4G LTE and 5G Core deployments.

Experience with subscriber provisioning and authentication solutions.

Preferred

Qualifications

Bachelor's Degree in Telecommunications, Electronics, Computer Science, or related field.

Nokia SDM/HSS/UDM certifications preferred.

Knowledge of cloud-native telecom applications and microservices architecture.

Familiarity with DevOps, CI/CD, and automation tools. Key Competencies

Strong troubleshooting and analytical skills.

Telecom Core Network expertise.

Customer-focused approach.

Incident and problem management.

Cross-functional collaboration.

Effective written and verbal communication.

Ability to work in 24x7 support and critical production environments. Nice to Have

Experience in 5G UDM, UDR, AUSF implementations.

Exposure to IoT subscriber management platforms.

Knowledge of policy management solutions (PCRF/PCF).

Automation using Python, Shell, or Ansible.

Location: NOIDA

Employment Type: Full time

Experience: 5-7 Years

Domain: Telecom Core Network | Subscriber Data Management

📌 Subscriber Data Management (SDM) Engineer (Bengaluru)
🏢 Capgemini Engineering
📍 Bengaluru