Senior Vulnerability Tester @

3 days ago

Warszawa, Mazovia, Czech Republic Devire Full time

  • Strong Linux expertise – including privilege escalation, process & memory management, and shell scripting.


  • Dev + Security profile – proven ability to read, understand, and assess large codebases, especially in C++ and Python (Java and other languages a plus).


  • Experience in source code review and secure coding practices.


  • Proven skills in assessment of distributed systems, infrastructure, and networking protocols.


  • Ability to recommend implementation changes to developers in real time.


  • Solid understanding of networking protocols, infrastructure security, and web services (REST, SOAP).


  • Experience with Linux-level and infrastructure penetration testing in a white-box context.


  • Knowledge of cryptographic concepts, authentication mechanisms, and secure architecture design.


  • Excellent communication skills in English (min. B2).


  • BSc in Computer Science, Cybersecurity, or related field – strong academic foundation preferred.

Devire IT Outsourcing is looking for an experienced Vulnerability Tester to join an international project in the financial sector. This is a unique opportunity for professionals passionate about building security into applications from the ground up, working directly with development teams during the early stages of the software lifecycle.

Our client operates in the banking and financial services industry, delivering advanced security advisory and technology solutions across highly distributed systems. You will work as part of the development team — not testing after release, but reviewing source code, architecture, and implementation in progress to ensure compliance with strict security requirements. The focus is on white-box security engineering, deep Linux-level analysis, and proactive risk elimination before production.

  • Salary based on B2B contract (via Devire) 175-210 pln/h net+vat
  • Long-term employment
  • Private HealthCare
  • Sports card 
  • Life insurance
  • Working for a leading corporation with a stable market position
  • Working in the international environment
  • 3 days a week office work with supportive and positive environment
Requirements: Linux, Shell, Security, C++, Python, Java, Networking, Protocols, Web services, SOAP, Testing, Communication skills, Cybersecurity

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