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Junior Penetration Tester

One eSecurity • Spain
Full Remote
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AI Summary

Junior Pentester role focused on web application penetration testing and security assessments. Responsibilities include vulnerability analysis, infrastructure testing support, research, and reporting. Requires 2+ years of web pentesting experience, OWASP knowledge, Linux, networking, and scripting skills.

Key Highlights
Junior Pentester role with at least 2 years of web application penetration testing experience
100% remote position
Hands-on experience with OWASP methodologies and common web vulnerabilities
Practical experience with tools such as Burp Suite, Nmap, Metasploit, and similar
Ability to document findings and provide remediation recommendations
Key Responsibilities
Perform security assessments and penetration tests on web applications to identify and validate vulnerabilities.
Analyze authentication mechanisms, access controls, session management and other application security components.
Assess vulnerabilities based on their technical impact and potential business risk.
Support infrastructure and network penetration testing activities, including vulnerability identification and validation.
Collaborate with senior team members on more complex security assessments.
Research emerging vulnerabilities, attack techniques and offensive security tools.
Develop and adapt testing techniques to identify potential security weaknesses.
Contribute to the continuous improvement of internal testing methodologies and tools.
Prepare clear and structured technical reports detailing identified vulnerabilities, exploitation evidence, risk levels and remediation recommendations.
Communicate findings to internal teams and clients, providing practical guidance to improve their security posture.
Collaborate with other cybersecurity professionals to ensure the quality and consistency of security assessments.

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Technical Skills Required
Web Application Penetration Testing Linux Python
Benefits & Perks
100% remote
Exciting professional cybersecurity projects
Top team of highly recognized professionals
Attractive salary

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Nice to Have
Experience performing infrastructure and network penetration testing, including vulnerability assessment of internal and external systems.
Knowledge of Windows environments, Active Directory and common infrastructure vulnerabilities.
Cybersecurity certifications such as eJPT, PNPT, OSCP or similar.

Job Description

Are you passionate about offensive cybersecurity and looking for an opportunity to take your pentesting skills to the next level?

At ONE, we are looking for a Junior Pentester with at least 2 years of hands-on experience in web application penetration testing to join our team in a 100% remote position.

We are looking for someone with a curious and proactive mindset, a passion for ethical hacking, and a strong interest in continuously learning and exploring new attack techniques.

Key Requirements

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Job Overview
Posted Nov 03, 2026
Employment Full-time
Experience Entry level
Location Spain
Category Cyber Security
Company One eSecurity
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