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September 2026

Cyber Security Pentester (m/f/d)

Remote Full-Time German 70.000€ - 85.000€

We are looking for a highly skilled and passionate Cyber Security Pentester (m/f/d) to strengthen our security team at ECSO CLOUD. In this role, you will simulate real-world cyberattacks against our systems, networks, and cloud infrastructure to identify vulnerabilities before malicious actors can exploit them, helping us maintain the highest security standards.

About us

At ECSO CLOUD, we've built our reputation on flexible, secure and highly available cloud hosting for growing businesses. Our success comes down to three things: innovation, reliability, and genuine teamwork. As part of our team, spread across multiple locations, you'll work in a dynamic environment where your ideas actually matter. We're looking for someone driven, communicative and goal-oriented who wants to help us deliver fair, transparent service, and grow their own career while doing it.

Responsibilities

  • Conducting comprehensive penetration tests on web applications, APIs, network infrastructure, and cloud environments.
  • Performing vulnerability assessments and threat modeling to identify potential security risks.
  • Developing and executing customized exploit scripts and testing methodologies.
  • Documenting technical findings and writing detailed, actionable security reports for both technical and non-technical stakeholders.
  • Providing clear remediation guidance and collaborating with development and IT teams to fix identified vulnerabilities.
  • Staying up to date with the latest threat landscape, hacking techniques, and security research.

Qualifications

  • Degree in Cyber Security, Computer Science, or a related field (or equivalent practical experience and proven track record).
  • Relevant industry certifications such as OSCP, CEH, CISSP, eWPT, or equivalent.
  • Strong knowledge of network protocols, operating systems, web application security, and cloud architectures (AWS, Azure, or GCP).
  • Proficiency in scripting languages (e.g., Python, Bash, PowerShell) for automation and exploit development.
  • Deep familiarity with standard security tools like Burp Suite, Metasploit, Nmap, and Wireshark.
  • Analytical mindset with strong communication skills in English.

Benefits

A few of the things that come with working here.

Insight into modern IT environments and cloud technologies
Practical experience in a dynamic team
Personal mentoring and the opportunity to actively contribute your own knowledge
Flexible working hours
A company-issued laptop (Mac)
Free snacks and drinks, provided you are working on-site.
Lieferando Flat for all on-site employees.
Free access to a fitness center of your choice (we'll cover the costs).
Private Retirement Savings
Pets are also allowed at the workplace (and are actually very popular).
Additional vacation days on company holidays / when things are slow.
(After a certain length of service) Company car leasing at Hanko (BMW)
Exclusive employee discounts on ECSO CLOUD products.
Reimbursement for travel expenses (e.g., for a trip to a data center).
Regular team activities (including those abroad) with all costs covered.
Additional family benefits (extended paternity leave, extra vacation days for family activities, etc.).

Apply for this position

Takes about 3 minutes. You'll need your CV and a short cover letter.

Please always state your gross annual salary.

PDF, DOC, DOCX or ODT, max. 10 MB per file.

A real person on our team reviews every application.
Apply now