Cybersecurity Engineer
Job Description
We are looking for a full-time Cybersecurity Engineer to join K3Y Ltd, a fast-growing SME with presence in Bulgaria and Greece. K3Y Ltd is one of the most dynamic and vibrant technology companies in Bulgaria, Greece and Europe, dealing with deep tech topics like cybersecurity, data privacy, artificial intelligence, 6th generation of cellular networks and next generation Internet of Things. K3Y Ltd invests in innovative and sustainable software solutions and tools, while delivering professional services and consulting worldwide. Participating in more than 32+ illustrious EU-funded projects (H2020, Horizon Europe, Erasmus+ and more), K3Y Ltd is to emerge as a leading technology and service provider by materialising innovation into business and market solutions in the Balkans, Eastern Europe, across Europe and worldwide.
We are seeking for a Cybersecurity Engineer specialising in penetration testing and cybersecurity assessment & development to join our team. You will conduct risk & security assessments on network infrastructures, applications, and emerging applications & technologies (5G, IoT, SDN/NFV), contributing directly to EU-funded R&D or/and commercial projects. Your findings will shape the development of next-generation cybersecurity tools, including agentic penetration testing suites, intrusion detection systems, threat mitigation tools, and security datasets used across multinational research consortia. If needed, you will represent the company in consortium meetings, workshops, and EU project reviews, while participating in internal and plenary meetings, demonstration meetings, workshops and conferences, where appropriate.
Responsibilities
- Plan and execute penetration tests on network infrastructures, virtualised environments, and emerging tech platforms.
- Develop and maintain custom security tools, scripts, and attack/defence emulators.
- Contribute to the creation and curation of security datasets for ML-based threat detection research.
- Perform vulnerability assessments and risk analysis, by translating findings into actionable recommendations.
- Author and deliver high-quality technical and non-technical reports, research deliverables, and scientific papers.
- Collaborate with internal engineers and international consortium partners on cybersecurity R&D workstreams.
- Participate in technical and consortium review meetings, representing the company.
- Stay current with the latest attack techniques, CVEs, and cybersecurity research trends.
Basic Qualifications
- BSc or/and MSc in Computer Science, Engineering, ICT or related fields.
- Proven hands-on experience in penetration testing (network, web application, and/or infrastructure).
- Proficiency in Python for exploit scripting, automation and tooling.
- Familiarity with vulnerability assessment methodologies (CVE analysis, CVSS scoring, threat modelling).
- Strong problem-solving, documentation, and communication skills across technical and non-technical contexts.
- Self-motivated, with the ability to work independently and collaborate across international teams.
Preferred Qualifications
- Doctor of Philosophy (PhD) in scientific or engineering field, preferably in computer science, electrical engineering or ICT.
- Experience in working with EU-funded projects.
- Certifications such as OSCP, CEH, GPEN, CISSP, or CCNA Security.
- Experience with containerised environments (Docker, Kubernetes) and their security implications.
- Knowledge of red team / blue team methodologies and adversarial simulation frameworks (e.g., MITRE ATT&CK).
- Exposure to EU R&D projects (Horizon 2020 / Horizon Europe) is a strong plus.
Benefits
- Friendly, motivated, and inclusive team with a strong European and International network.
- Competitive remuneration package based on qualifications and experience.
- Exposure to multinational and multicultural environments.
- Diversity of challenges, experience and working teams.
- Opportunity to enrich your skills and experience by working with experienced and talented professionals.
- Flexible working hours.
- Career progression opportunities.
Selection Process
- Interested applications will be invited for a remote or on-site interview.
- Only short-listed applications will be invited to the selections process.
- For more information about the Job Offer, you can contact: [email protected]
Equal Opportunities
K3Y Ltd is proud to be an equal opportunity workplace. We are committed to equal employment opportunity without unlawful regard to race, colour, ancestry, religion, gender, national origin, sexual orientation, age, citizenship, marital status, disability, veteran status, or other local legally protected characteristics.
Preferred Starting Date
No fixed starting date. We are looking forward to filling the job position as soon as possible.
To apply, K3Y Ltd invites applicants to send a detailed CV to the following email address: [email protected] with the title "Application for the position of the Cybersecurity Engineer" in the subject.