Device Testing 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?

Dimitar Dimitrov is looking for a new team member.

Your daily routine would include:

• Performing functional, performance, and compatibility testing on smartphones and mobile devices.
• Validating device behavior and performance across mobile networks (4G, 5G, VoLTE, VoWiFi, etc.).
• Executing test plans, documenting results, and identifying issues early in the development or launch cycle.
• Conducting both field and laboratory testing using specialized tools and testing equipment.
• Investigating system logs and debugging issues with vendor-provided diagnostic tools.
• Collaborating with device manufacturers and internal teams to share findings and drive issue resolution.
• Supporting device certification processes, software updates, and technical troubleshooting activities.
• Staying up to date with the latest smartphone technologies, operating system updates, and hardware innovations.

We’ll know you can succeed in this role if you have:

• A Bachelor’s degree in Telecommunications, Electronics, Computer Science, or a related technical field.
• Hands-on experience in testing smartphones, mobile devices, or telecommunications equipment.
• Solid understanding of mobile communication standards such as GSM, UMTS, LTE, and 5G NR.
• Knowledge of Session Initiation Protocol (SIP).
• Familiarity with Android and iOS platforms.
• Experience working with testing and network analysis tools (e.g., Wireshark, QXDM, MTK Catcher).
• Strong ability to analyze logs, troubleshoot technical issues, and recommend solutions.
• Well-developed documentation and reporting skills.
• Analytical mindset with a structured approach to problem solving.

Nice-to-Have:

• Experience with device certification or interoperability testing.
• Knowledge of IMS services (VoLTE, VoWiFi, RCS).
• Understanding of RF testing or network KPIs.

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.