Mobile 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?

Georgi Kodjaivanov is looking for a new team member.

Your daily routine would include:

• Designing, developing, and maintaining automated test frameworks for EPC and 5G Core network elements.
• Validating end-to-end data services, signaling flows, and policy control scenarios.
• Executing functional, regression, performance, load, and stress testing activities.
• Automating test cases using Python or similar scripting languages.
• Analyzing signaling protocols such as GTPv2, Diameter, PFCP, HTTP/2, SBI, and NGAP.
• Troubleshooting and analyzing protocol traces using tools like Wireshark, tcpdump, or similar.
• Integrating automated testing processes into CI/CD pipelines.
• Preparing clear and structured test documentation, reports, and KPI analysis.
• Supporting continuous integration and delivery processes related to network function testing.
• Collaborating with vendors and internal engineering teams to investigate and resolve technical issues.
• Aligning testing scope and priorities with business stakeholders and partner organizations.

We’ll know you can make it if you have:

• Bachelor’s degree in Telecommunications, Computer Science, or a related technical field.
• At least 2 years of hands-on experience in Packet Core environments (EPC and/or 5G Core).
• Solid understanding of 4G EPC nodes (MME, SGW, PGW, PCRF) and/or 5G Core functions (AMF, SMF, UPF, PCF).
• Good knowledge of 3GPP standards and mobile core network architecture.
• Strong analytical thinking, problem-solving, and troubleshooting skills.
• English language proficiency at B2 level 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.
Sounds good? Apply now!
Only shortlisted candidates will be contacted.