Application Security Engineer (relocation to Barcelona)

Commit; Warszawa; On-site; PLN 60,000 - 90,000; Full time

Job summary

Commit in Warsaw is on the lookout for a talented security researcher specializing in offensive security. In this hands-on role, you will work with a team of experts conducting penetration testing, developing innovative security tools, and addressing vulnerabilities in products. You will be integral to shaping the security posture of the company.

The position requires strong technical skills across multiple domains, including web and cloud technologies. Ideal candidates will have 4+ years of experience in security testing and be familiar with modern architectures.

Qualifications

• 4+ years of experience in research and penetration testing.
• Deep technical understanding of web, API, cloud-native, and backend technologies.
• Ability to report technical findings effectively.

Responsibilities

• Help to reshape JFrog Product Security.
• Plan and execute advanced penetration testing campaigns.
• Develop tools and frameworks for scalable security testing.

Skills

Research and penetration testing

Strong coding skills

Experience with penetration testing tools

Knowledge of AI and LLM penetration testing

Understanding of secure software architecture

Experience with CI/CD pipelines

Tools

Burp Suite

Metasploit

Job description

We’re running the software that runs the world – and we want you along for the ride. The company is a special place with a unique combination of brilliance, spirit, and great people. Here, if you’re willing to do more, your career can take off. And since software plays a central role in everyone’s lives, you’ll be part of a critical mission.

In this role, you will work with a team of researchers and ethical hackers focused on offensive security testing, automated exploit discovery, and advanced application security research. Your work will directly influence the security posture of the company's products and help scale secure-by-design principles.

This is a hands‑on technical role with a strong emphasis on offensive security, code exploitation, automation, and innovation.

Responsibilities

• Help to reshape JFrog Product Security
• Plan and execute advanced penetration testing campaigns.
• Develop tools and frameworks for scalable security testing and fuzzing.
• Lead Security innovation by building and managing penetration testing tools \ AI Agents
• Analyze vulnerabilities, perform root cause analysis, and develop proofs of concept.
• Identify systemic product weaknesses and help define long‑term mitigations.
• Collaborate with engineering teams to reproduce, triage, and fix vulnerabilities.
• Contribute to security research publications, CVE submissions, and industry knowledge sharing.
• Continuously evolve internal testing capabilities using modern tooling and AI‑assisted approaches.

Requirements

• 4+ year experience in Research and penetration testing.
• Strong coding skills and deep technical understanding of web, API, cloud‑native, and backend technologies.
• AI and LLM penetration testing knowledge and experience.
• Experience with penetration testing tools (Burp Suite, Metasploit, etc.) and custom security tools development.
• Familiarity with modern architectures (e.g., Cloud, microservices, containers, Kubernetes).
• Familiarity with secure software architecture and typical attack vectors.
• Demonstrated ability to do security testing engagements and report technical findings effectively.
• Experience building or integrating automated PT or fuzzing pipelines is a strong advantage.
• Knowledge and hands‑on experience with SSDLC tools and CI/CD pipelines.