Senior Penetration Tester

Job Description

Join Us

We are seeking a highly skilled and experienced Senior Penetration Tester to join our cybersecurity team.

We can offer this position as part time job in case of your interest

What you’ll do

• In this role, you will lead and execute advanced penetration testing engagements across a variety of environments, including networks, applications, cloud infrastructures, and physical security systems.
• You will identify vulnerabilities, simulate real-world attacks, and provide actionable recommendations to enhance our clients' security posture.
• This position requires a deep understanding of offensive security techniques, strong analytical skills, and the ability to communicate complex findings to both technical and non-technical stakeholders.
• What makes this role particularly compelling is the opportunity to join our internal offensive cybersecurity team at a formative stage.
• You will help fine-tune key elements such as test environment setup, reporting frameworks, and automation to ensure they are as pentester-friendly and effective as possibl

What skills we need

• High proficiency in penetration testing of web applications and external/internal infrastructure (experience in other areas such as mobile apps, social engineering, red teaming is welcomed)
• Knowledge of Active Directory attacks and post-exploitation techniques
• Strong knowledge of network protocols, operating systems (Windows, Linux), and web application architectures.
• Experience with scripting and automation (Python, Bash, PowerShell).
• Experience with cloud platforms (AWS, Azure, GCP), containers, and CI/CD environments
• Familiarity with industry standards such as OWASP , MITRE ATT&CK, PTES, and NIST.

• Understanding of secure coding practices and common vulnerabilities (OWASP Top 10, SANS CWE Top 25).

Certifications (preferred but not mandatory):

• OSCP, OSCE, OSEP, GPEN, or similar.

Required Competencies:

• Ethical Integrity: Commitment to ethical hacking principles and responsible disclosure practices.
• Growth Mindset: A proactive, always-learning approach to evolving techniques, tools, and industry best practices
• Analytical Thinking: Ability to assess complex systems and identify potential security weaknesses.
• Problem Solving: Creative and methodical approach to bypassing security controls and simulating real-world attack scenarios.
• Communication: Strong written and verbal communication skills for reporting findings and presenting to stakeholders.
• Adaptability: Comfortable working in dynamic environments and staying current with emerging threats and tools.

What we offer

• We currently work in a roughly 3 days from home, 2 days in the office mode,
• Here, we address each other informally and aren’t really bothered about a dress code… It suits us all just fine, and we hope you’ll feel good among us too.
• Annual bonus
• We keep up with the times or even a step ahead, so with us you can enjoy 5 weeks of vacation, 5 personal days
• We also think about parents, with 16 weeks vacations for new parents
• If Vodafone, then full on – you will get a mobile phone and a great unlimited tariff, plus 22 000 benefit points per year which you can use in the cafeteria to buy vacations, educational courses or just to invite your dearest to the cinema.
• We’re located on a metro line – right at the entrance actually – our headquarters are in Stodůlky. You’ll find everything you need in the building and the vicinity for your lunch break or coffee break, and you can even shop in the nearby stores.
• And if you need to shake it off after work, you can grab one of the bikes we rent, or go to our gym located in the building.

At Vodafone, we’re passionate about creating inclusive workplaces where everyone can be themselves and achieve their best. For us, that means supportive teams and strong relationships where everyone’s contribution is valued - across social and cultural backgrounds, ethnicities, age, genders, gender identities, abilities, sexual orientation, and everything that makes us unique. We want the best people to join us and make their difference, so we will always consider requests for flexible working (such as full-time, part-time, home-working).

Who we are

We are a leading international Telco, serving millions of customers. At Vodafone, we believe that connectivity is a force for good. If we use it for the things that really matter, it can improve people's lives and the world around us. Through our technology we empower people, connecting everyone regardless of who they are or where they live and we protect the planet, whilst helping our customers do the same.

Belonging at Vodafone isn't a concept; it's lived, breathed, and cultivated through everything we do. You'll be part of a global and diverse community, with many different minds, abilities, backgrounds and cultures. ;We're committed to increase diversity, ensure equal representation, and make Vodafone a place everyone feels safe, valued and included.

If you require any reasonable adjustments or have an accessibility request as part of your recruitment journey, for example, extended time or breaks in between online assessments, please refer to https://careers.vodafone.com/application-adjustments/ for guidance.

Together we can.