Mobile Voice Core Expert (f/m/d) @ A1 Competence Delivery Center

Strength. Care. Growth

A1 Competence Delivery Center is a vital component of A1’s telecommunications business. Acting as an expertise hub, CDC is dedicated to delivering a full range of high-quality IT, network, financial and other services to support A1’s operations across all OpCos, independent of location.

Using the power of being OneGroup and leveraging synergies, CDC enables transparency of resources, key skills and knowledge expansion and personal career growth opportunities’ enhancement, paired with job stability.

You will know we are the right place for you, if you are driven by:

• Opportunities to learn and build your career.
• Meaningful work in a stable and fast-paced company.
• Diversity of people, projects, and platforms.
• A supportive, fun, and inspiring place to work.

Job Overview:

The Mobile Voice Core Engineer is responsible for the operation, maintenance, integration, and development of core telecommunications network elements supporting voice services. The role includes network performance monitoring, capacity planning, implementation of new technologies and services, troubleshooting, and collaboration with internal teams and external vendors to ensure service availability, quality, and reliability.

Role insights:

• Operating, maintaining, and supporting mobile voice core network elements and related services.
• Ensuring the technical readiness, testing, acceptance, and commissioning of core network equipment and services.
• Monitoring network performance and troubleshooting voice core-related infrastructure and services.
• Working closely with equipment vendors and service providers to ensure effective support and maintenance and compliance with support and maintenance agreements.
• Contributing ideas and recommendations for network and process optimization.
• Supporting incident management activities and participating in on-call support when required.
• Working with internal teams and external partners to investigate and resolve technical issues.
• Supporting the implementation of new technologies and services within the mobile voice core environment.
• Contributing to network availability, reliability, and performance improvements.
• Supporting capacity planning activities related to voice core services.
• Participating in planned maintenance activities and technical initiatives related to the voice core environment.

What makes you unique: 

• Bachelor’s or Master’s degree in Telecommunications, Computer Engineering, Information Technology, or a related technical field.
• At least 1 year of experience in telecommunications, network engineering, or a related technical role.
• Good understanding of telecommunications core network architecture and functionality.
• Knowledge of telecom standards, signaling protocols, and technologies.
• Familiarity with GSM, UMTS, LTE, and VoLTE/IMS environments.
• Experience with Linux and Windows operating systems.
• Strong analytical and problem-solving skills.
• Ability to work effectively in a dynamic and fast-paced environment.
• Team-oriented mindset with excellent communication skills.
• Adaptability and willingness to learn new technologies.
• High level of responsibility, reliability, and integrity.
• Customer and service-oriented attitude.
• Ability to work independently and manage multiple priorities.
• Fluent written and spoken English.

Nice to Have:

• Experience with mobile core networks and voice service platforms.

Our gratitude for the job done will be eternal, but we’ll also offer you:

• Innovative technologies and platforms to “play” with.
• Modern working environment for your comfort.
• Friendly, ambitious, and motivated teammates to support each other.
• Thousands of online and in-person learning opportunities to grow;
• Challenging assignments and career development opportunities in multinational environment.
• Attractive remuneration package.
• Flexible working schedule and opportunity for home office.
• Numerous additional goodies, including, but not limited to free A1 services, discounts, health insurance and services, sports center, childcare, team and family events, etc.

If you have any questions,  please do not hesitate to contact Mariya Ivanova.