Моbile Packet Core Engineer

Strength. Care. Growth

Did you know that A1 Bulgaria is working on international projects as well?

Our wide portfolio has long past the telecom services, and we are now offering digital solutions to millions of corporate, public, and private customers.

State-of-the-art technology, the latest innovations, and extremely talented professionals in various areas help us deliver the best-in-class products, services, and customer experience. 

You’ll know A1 Bulgaria is 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.

Would you like to join us?

Petar Deliiliev is looking for a new team member.

Your Daily Routine Would Include:

• Keeping our Mobile Packet Core network and services highly available, efficient, and evolving;
• Using cloud-native and virtualized EPC/5GC technologies to boost network performance;
• Running configurations, tests, and maintenance to ensure reliable, top-quality service;
• Tracking KPIs and acting on insights to optimize performance and customer experience;
• Working with teams across countries and functions to drive joint projects;
• Partnering with NOC, RAN, Core, Planning, Roaming, and Marketing to align operations with business goals.

We’Ll Know You Can Make It If You Have:

• 2+ years of hands-on experience with Mobile Packet or IP/MPLS Core Networks;
• University degree in IT, Telecommunications, or a related field;
• Solid understanding of Mobile Packet Core EPC/5GC architecture and functions (e.g., SGW, PGW);
• Practical experience in operations, configuration management, system health checks, and KPI performance analysis;
• Good knowledge of 3GPP protocols and message flows in Mobile Data Networks (e.g., S1AP/NAS, GTP, S6a, AAA, Diameter, SIP, DNS);
• Strong grasp of IP networking principles, troubleshooting, and routing protocols (e.g., TCP/IP, BGP, HTTP/2);
• Working knowledge of Linux environments;
• Willingness to take part in a 24/7 on-call rotation;
• English level B2 (upper-intermediate) or higher.

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.
• Not sure yet? See us in action in our A1 Blog.
• Any questions? Contact Simeon Kostov
• Sounds good? Apply now!
• Deadline for application: 05.11.2025
• Only shortlisted candidates will be contacted.