Application Security Engineer - Pentester

Veeam is the Data and AI Trust Company, specializing in helping organizations ensure their data and AI are fully understood, secured, and resilient to enable the acceleration of safe AI at scale. As the market leader in both data resilience and data security posture management, Veeam is built for the convergence of identity, data, security, and AI risk. Headquartered in Seattle with offices in more than 30 countries, Veeam protects over 550,000 customers worldwide, who trust Veeam to keep their businesses running. Join us as we go fearlessly forward together, growing, learning, and making a real impact for some of the world’s biggest brands. About the Role As an Application Security Engineer (Offensive Testing) , you will lead and perform penetration testing and DAST for Veeam Data Cloud products. You’ll use Burp Suite and modern web/API testing techniques to find real, exploitable issues, help prioritize risk, and work with engineering teams to drive fixes to completion. You will also improve testing tools and processes, make testing more repeatable, and help teams prevent recurring vulnerabilities—especially around authentication, authorization, session management, and tenant isolation. What You’ll Do Own offensive testing: plan what to test, how deep to go, and how often; create clear, consistent reports and reusable playbooks Perform manual pentesting (main focus): test web apps and APIs, especially authentication/authorization, multi-tenant boundaries, and critical workflows; chain issues into realistic attack paths Use Burp Suite daily: validate and reproduce findings with advanced Burp features; build and maintain repeatable scopes, macros, and authenticated flows Run and improve DAST: execute and tune authenticated scans, reduce false positives, and work with CI/platform teams to scale scanning and manage credentials Drive remediation: deliver high-quality write-ups, partner with engineers to fix and retest, and help prevent regressions; ensure findings are tracked with the right severity and SLAs Improve security long-term: spot recurring patterns and help teams prevent them through standards, libraries, platform controls, and input to threat modeling/design reviews What You’ll Bring Strong web and API pentesting experience, especially in authorization (IDOR/BOLA, privilege escalation, role/tenant boundaries), authentication/session flows (tokens, identity integrations), and common vulnerabilities (injection, SSRF, deserialization, misconfigurations) with practical exploitation skills Advanced Burp Suite skills: manual validation, targeted fuzzing, authenticated testing, and workflow automation (extensions/macros) Experience writing Semgrep rules to detect insecure patterns and improve secure-by-default development DAST experience at scale: running or supporting authenticated scans, tuning coverage, and reducing false positives Clear written communication: concise PoCs and actionable remediation guidance for engineers Bonus Skills SaaS multi-tenant security testing experience; OAuth2/OIDC/SAML depth; bug bounty triage; writing custom tooling or Burp extensions What You’ll Get 26 paid days off annually, plus 4 extra global VeeaMe Days for self-care and 24 paid volunteer hours annually through Veeam Cares Paid parental, maternity, and paternity leave Fully covered family medical plan, dental, rehab, and vaccinations Life, critical illness, and disability insurance Employer pension contribution via PPK Monthly Edenred allowance of 450 PLN for meals MultiSport card fully covered by Veeam, giving access to sports facilities nationwide Up to 12 free therapy sessions annually, plus legal and financial advice Opportunities to learn and grow through on-demand libraries (LinkedIn Learning, O’Reilly), mentoring, workshops and learning events like our annual Global Day of Learning Please note: If the applicant is permanently present outside of Poland, Veeam reserves the right to refuse to consider ... (truncated, view full listing at source)