Junior Penetration Tester (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.
Role Overview:
Аre you passionate about cybersecurity and eager to launch your
career in ethical hacking?
A1 Group is looking for a Junior Penetration Tester to join our
dynamic Cybersecurity Incident Management team. This is an exciting
opportunity to work on diverse projects, develop your technical
skills, and help strengthen the security posture of a major
technology organization.
Role insights:
Simulate attacks and assess vulnerabilities in a variety of
environments and technologies.
Test a wide range of devices used in customer solutions across
multiple projects.
Contribute to the study, development, and improvement of
penetration testing tools and processes.
Apply OWASP standards to deliver thorough penetration testing and
security assessment services.
Maintain high standards for service quality in line with SLA and
OLA commitments to both internal and external customers.
Draft clear technical reports with recommendations to address
identified vulnerabilities and estimate operational risks.
Collaborate closely with your manager and team on matters outside
regular standards and procedures.
Work in accordance with A1 Group management systems and ISO
standard requirements.
Be part of company-wide or local security projects, as
assigned.
Escalate complex issues to more experienced colleagues or your
manager when needed.
Support your manager in tasks related to cybersecurity solutions
and services for A1 Group.
Taking initiative to support your team beyond your day-to-day tasks
when appropriate.
Meeting deadlines and maintaining high-quality standards.
Conforming to all A1 Group codes of conduct, anti-corruption and
conflict of interest guidelines, as well as all relevant company
policies and procedures—including those for data protection and
information security.
Protecting company assets and ensuring strict confidentiality of
all information you access.
Following applicable health, safety, and regulatory
requirements.
What makes you unique:
Degree in telecommunications, information or computer
technologies.
Basic understanding of cybersecurity concepts.
Familiarity with network security, operating systems
(Linux/Windows), and web technologies.
Experience with tools such as Kali Linux, Metasploit, Burp Suite,
Nmap, Wireshark, etc.
Knowledge of vulnerabilities (OWASP, CVE databases) and
exploitation methods.
Programming experience with Python, Ruby, PowerShell, or Bash;
understanding of algorithms, data structures, and fundamental OOP
principles.
Basic knowledge of databases (SQL—MySQL/MariaDB, PostgreSQL,
SQLite; and NoSQL—MongoDB).
Our gratitude for the job done will be eternal, but we’ll also
offer you:
Innovative technologies and platforms to work with.
Modern working environment for your comfort.
Friendly, ambitious, and motivated teammates to support each
other.
Thousands of online and in-person learning opportunities for you to
grow.
Challenging assignments and career development opportunities in
multinational environment.
Attractive compensation package.
Hybrid working model.
Numerous additional benefits, including, but not limited to free A1
services.
If you have any questions, please do not hesitate to contact Yana
Mladenova
Cyber Security
Junior Penetration Tester (f/m/d)@ A1 Competence Delivery
Center
Пълен работен ден
Крайна дата: 17.12.2025.
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