ATHEX Group, certified as a Great Place to Work®, is a member of Euronext Group; Euronext is the leading European capital market infrastructure, covering the entire capital markets value chain, from listing, trading, clearing, settlement and custody to solutions for issuers and investors.

ATHEX Group is seeking a Junior Information Security Engineer to join its Information Security Division, with a primary focus on Cyber Security Operations.

This is an excellent opportunity for candidates at the early stages of their cyber security career who are eager to gain hands-on exposure to enterprise-grade security platforms and participation in real-life incident response and security testing activities, while gaining experience in a regulated Fintech environment with high security standards, with structured on-the-job training and continuous mentoring from senior security professionals.

The role will involve close collaboration with the rest of the members of the Information Security Team and will report to the Chief Information Security Officer/Head of the Division.

Key Accountabilities

Security Operations (Blue Team)

· Support the operation, monitoring, and basic configuration of security platforms such as SIEM, EDR, PAM, WAF, DLP, AV, Email Security, VA Scanners, IAM/Directory Services

· Monitor security alerts and events, perform first-level triage, and escalate incidents when required

· Assist in cyber security incident response activities, including investigation, containment, and recovery

· Support log collection, validation, and forwarding from IT and business systems to central security platforms

· Assist in maintaining detection rules, dashboards, and reporting.

Security Testing & Red Team Support

· Assist in vulnerability assessments, OWASP testing, internal penetration tests, and system hardening reviews

· Support external penetration testers and auditors during security assessments

· Participate in Purple Team activities, helping improve detection and response based on testing results.

Security Engineering & Integration

· Support IT teams (DEV, OPS, ADM) in integrating applications and infrastructure with security controls

· Assist in documenting and maintaining security configurations and data flows.

Awareness, Threat Intelligence & Exercises

· Support threat intelligence tracking and vulnerability follow-up

· Participate in cyber security exercises, simulations, and drills

· Contribute to security awareness activities and internal knowledge sharing.

Knowledge and experience

• Bachelor’s degree in Computer Science, Computer Engineering, Information Systems, or related field

• Master’s degree in information security / cyber security is a plus

• 0–2 years of experience in Information Security, IT Security, SOC, or related field.

Skills & Competences

• Basic understanding of:

  • Networking (TCP/IP, DNS, HTTP/S),

  • Operating systems (Windows, Linux),

  • Core security concepts (threats, vulnerabilities, logging, malware),

• Familiarity with ISO/IEC 27001, NIS2, DORA, GDPR is a plus

• Strong analytical and troubleshooting skills

• Eagerness to learn and adapt to new technologies and methodologies

• Excellent communication skills in Greek and English

• Proactive, motivated, and a strong team player

• Fulfilled military obligations (for men).

What we offer

At Athens Exchange Group, we highly value our employees and provide them with a work environment that fosters creativity and personal growth. Our compensation and benefits scheme is designed to support our employees and their families, and it includes:

• Hybrid working model

• Competitive base salary

• Annual bonus based on company and individual performance

• Retirement savings plan, according to company policy

• Private health & life insurance with free inclusion of family members

• Family benefits (Kindergarten and summer camp allowance, Christmas gifts, increased parental leave, etc.)

• Subsidized meals in company restaurant

• Access to online training platforms such as LinkedIn Learning, Udemy, Pluralsight & continuous learning opportunities

• 24/7 employee assistance program

• Participation in company sports activities (e.g. soccer, basketball, beach volleyball, pilates).

ATHEXGROUP is committed to providing equal employment opportunities and positively encourages applications from suitably qualified candidates regardless of gender, age, disability, religion, race, nationality or origin, gender identity and/or expression, sexual orientation, or any other status protected by applicable law.