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CommIT

Application Security Research Engineer

CommIT Barcelona, Catalonia, Spain

Software Development · 501-1,000 employees

Aug 10
security Senior (5-10 yrs) Full-time Spain
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About the role

You will lead advanced penetration testing campaigns and develop automated tools for vulnerability discovery and exploit development. Additionally, you will collaborate with engineering teams to perform root cause analysis and implement long-term security mitigations.

What they look for

Offensive Security Penetration Testing Vulnerability Analysis Fuzzing Exploit Development AI Agents LLM Security Burp Suite Metasploit Cloud Security Kubernetes Microservices SSDLC CI/CD Pipelines Root Cause Analysis API Security

Requirements

Candidates must have at least 5 years of experience in security research and penetration testing with strong coding skills. Proficiency in modern web, API, cloud-native technologies, and AI-assisted security testing is required.

Full description

We are looking for an Application Security Research Engineer in Barcelona. 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 company 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 the company's 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

Requirements:

  • 5+ 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 knowldge 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 lead 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,
  • Publications or open-source contributions in the security domain are a plus.

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