Immunity Systems

Immunity Systems is a Polish cybersecurity firm based in Warsaw with 14 years in the market. The company focuses on offensive and defensive security testing across the full technology stack: web applications, thick clients, network layers, system hardening, databases, operating systems, and network devices. The team consists of specialists with over a decade of experience in both offensive and defensive IT security, plus implementation and verification of security levels across deployed systems.

The company's work spans security assessment and incident response. Immunity Systems uses custom methodologies built on globally recognized frameworks, continuously expanding checklists and procedures for specific technologies and domains. They've found critical vulnerabilities in client systems but notably don't publish numbers—the company states on its site that disclosing vulnerability counts would violate client confidentiality and compromise security posture.

Services and capabilities

Immunity Systems conducts security testing and assessment across multiple layers. On the application side, they test web applications and thick clients. For infrastructure, their scope includes network security from the data link layer up, system hardening, database configuration, operating system security, and network device configuration. They also handle incident response and security verification.

The firm develops proprietary methodologies informed by international standards but tailored to specific technologies and client environments. They maintain and update security checklists specific to each domain and technology they encounter.

How they work

The company operates as a direct-engagement model where clients can contact them for security testing, incident handling, and general cybersecurity problem-solving. Immunity Systems emphasizes confidentiality in its communications—they explicitly avoid publishing metrics about vulnerabilities found or client vulnerability counts, treating that data as sensitive client information rather than marketing material.

Team and credentials

Founded in 2010, Immunity Systems employs a small specialist team. The oldest team member has 19 years of cybersecurity experience. The firm actively recruits engineers interested in security testing, exploit development, and system penetration testing. Specific certifications, compliance frameworks, and partner statuses are not mentioned on the public website.