Core End-to-End Test Engineer - MSS & MGW

YOUR ROLE

Location: Dublin, Ireland (Customer Project Site)

The End-to-End Test Engineer is responsible for validating and assuring the quality, performance, and functionality of Nokia Mobile Softswitch (MSS) and Media Gateway (MGW) platforms across customer environments.

The role involves designing, executing, and managing end-to-end test activities covering Circuit Switched (CS) voice services, interconnects, signaling protocols, network migrations, and interoperability scenarios. The engineer will work closely with solution architects, deployment engineers, operations teams, and customers to ensure successful implementation and acceptance of network services.

The ideal candidate possesses strong knowledge of telecom core networks, signaling protocols, voice services, and testing methodologies within 2G, 3G, 4G, and IMS environments.

Key Responsibilities

Test Planning & Design

• Develop End-to-End Test Strategies, Test Plans, and Test Cases for Nokia MSS and MGW platforms.
• Define functional, integration, interoperability, regression, and acceptance test scenarios.
• Review High-Level Design (HLD), Low-Level Design (LLD), and customer requirements to create comprehensive test coverage.
• Prepare test environments and validation procedures.

Test Execution

• Execute End-to-End testing activities for Nokia MSS and MGW solutions.
• Validate voice services, signaling flows, routing configurations, and network integrations.
• Perform acceptance testing during network deployments, upgrades, migrations, and expansions.
• Verify customer-specific requirements are fully met before service acceptance.

Network Validation

• Validate Circuit Switched voice services across:

o 2G GSM

o 3G UMTS

o CS Core Networks

o Interconnect Networks

• Verify call setup, call release, supplementary services, roaming, emergency services, and interworking scenarios.
• Perform interoperability testing with external operators and third-party network elements.

Troubleshooting & Defect Management

• Investigate and analyze failed test cases.
• Perform protocol trace analysis and fault isolation.
• Work with engineering and integration teams to resolve identified defects.
• Maintain detailed defect tracking and resolution reports.
• Support Root Cause Analysis (RCA) activities.

Documentation & Reporting

• Prepare and maintain:

o Test Plans

o Test Cases

o Test Reports

o Acceptance Reports

o Defect Logs

o Validation Documentation

• Provide regular status updates to project stakeholders.
• Ensure documentation complies with customer and project standards.

Customer Acceptance Support

• Support User Acceptance Testing (UAT).
• Participate in customer acceptance activities and technical reviews.
• Provide testing evidence and sign-off documentation.
• Collaborate with operations teams during service launch and transition to production.

YOUR PROFILE

Required Technical Skills

Nokia Core Network Technologies

• Nokia MSS (Mobile Softswitch Server)
• Nokia MGW (Media Gateway)
• Nokia DX200 and ATCA platforms
• Voice Routing and Datafill Configuration

Signaling Protocols

• SS7
• SIGTRAN
• ISUP
• MAP
• SCTP
• M3UA

Voice & Media Protocols

• SIP
• SIP-I
• BICC
• H.248 / MEGACO

Mobile Networks

• GSM
• UMTS
• LTE Fundamentals
• IMS Interworking
• CS Core Architecture

Testing & Validation

• End-to-End Testing
• Functional Testing
• Integration Testing
• Regression Testing
• Acceptance Testing (UAT)
• Interoperability Testing

Troubleshooting Tools

• Wireshark
• Tektronix
• Nokia Iris
• GEO Tools
• Network Trace Analysis

Operating Systems

• Linux
• Unix

Required Experience & Qualifications

• Bachelor's degree in Telecommunications, Electronic Engineering, Computer Science, Information Technology, or a related discipline.
• Minimum 5 years of experience in telecommunications testing, validation, integration, or core network engineering.
• Proven experience with Nokia MSS and MGW platforms.
• Experience performing End-to-End testing in mobile core network environments.
• Strong knowledge of voice services and signaling protocols.
• Experience in troubleshooting complex telecom network issues.
• Experience working in customer-facing project environments.
• English proficiency at C1 level (written and spoken) is mandatory.
• Experience with test documentation and customer acceptance processes.

Preferred Qualifications

• Nokia certifications related to MSS, MGW, or Core Networks.
• Experience supporting Tier-1 Mobile Network Operators.
• Understanding of VoLTE, IMS, and CSFB services.
• Experience in network modernization and migration projects.
• Knowledge of automated testing methodologies is considered an advantage.

Core Competencies

• Analytical Thinking
• Problem Solving
• Attention to Detail
• Customer Focus
• Teamwork
• Communication Skills
• Time Management
• Results Orientation
• Technical Documentation
• Quality Assurance Mindset

Success Measures (KPIs)

• Successful completion of E2E testing activities within project timelines.
• First-pass acceptance rate.
• Defect detection effectiveness.
• Quality of test documentation.
• Customer acceptance and satisfaction.
• Reduced production incidents after deployment.
• Compliance with project quality standards and testing methodologies.

Reports To: Test Manager / Integration Manager / Delivery Manager

Key Interfaces: Customer Engineering Teams, Nokia Technical Support, Project Managers, Operations Teams, Integration Engineers, and Third-Party Vendors. WHAT YOU´LL LOVE ABOUT WORKING HERE

Note: Travel and accommodation expenses will be covered.

Join a multicultural and inclusive team environment.

Enjoy a supportive atmosphere promoting work life balance.

Hybrid work.

Your career growth is central to our mission. Our array of career growth programs and diverse professionals are crafted to support you in exploring a world of opportunities.

Access valuable training and certifications in cutting edge technologies.

Engage in exciting national and international projects.

Health and life insurance.

Referral program with bonuses for talent recommendations.

ABOUT CAPGEMINI

Capgemini is an AI-powered global business and technology transformation partner, delivering tangible business value. We imagine the future of organizations and make it real with AI, technology, and people. With our strong heritage of nearly 60 years, we are a responsible and diverse group of 420,000 team members in more than 50 countries. We deliver end-to-end services and solutions with our deep industry expertise and strong partner ecosystem, leveraging our capabilities across strategy, technology, design, engineering and business operations.