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Sr. Information Security Administrator

Turkey, Istanbul · Job Posted February 02, 2026
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Job Description

Get ready to take your place on n11, an open market platform has made valuable contributions to the e-commerce sector since its establishment by bringing more than 330 thousand registered business partners to customers. We are looking for "Sr. Information Security Administrator & ” to join our team in Technology Department.

Job Responsibility

  • Perform manual and automated penetration testing on applications to identify and exploit vulnerabilities
  • Integrate and automate application security testing tools (SAST, DAST, SCA,IaC, Network Scans)
  • Devise, implement, and monitor vulnerability response processes to efficiently remediate critical and zero-day vulnerabilities
  • Assess potential security vulnerabilities within our applications, and work with development teams to ensure remediation in our established SLAs
  • Provide training to development teams on secure coding practices and awareness of emerging security threats
  • Stay abreast of emerging application security trends and threats, researching new attack vectors to update vulnerability management strategies accordingly
  • Utilize scripting languages (Python, Ruby, Bash, etc.) to build automation tools as needed
  • Manage DLP, SIEM, PAM, EDR, IAM, DAM , SCC , Mail Gateway Security Tools
  • Improve General Security of Networks , Cloud and Systems
  • Provide Single Point of Contract for the General information Security

Requirements

  • Bachelor's degree in Computer Science, Information Security, or a related field
  • Minimum 4 years of experience in application security, vulnerability management and information security
  • Experience with SAST, DAST, SCA, IAST, IaC, SBOMs and Secret Management
  • Expertise in utilizing various security tools such as Burp Suite, OWASP ZAP, Acunetix, Fortify, and Checkmarx, along with vulnerability scanners
  • Experience with security requirements for APIs. (SOAP, REST, GraphQL etc.)
  • Experience with Manuel Source Code Analysis and Penetration Testing of Mobile and Web Applications
  • Experience with container security, such as Docker and Kubernetes
  • Familiarity with “secure by design” and “shift left” security principles
  • Strong knowledge of software security risks and threats (OWASP top 10)
  • Solid understanding of web-based application technologies, web services/APIs, web-based authentication/single sign-on protocol and technologies
  • Participating in the setup, configuration, and maintenance of security tools on CI/CD infrastructure within the DevSecOps framework
  • Experience building prototypes of tools and exploits, as well as conducting vulnerability and penetration tests
  • Strong communication & interpersonal skills, and experience working cross-functionally with various teams
  • Experienced on Google Cloud
  • Experienced in PCI-DSS, ISO 27001, ITIL Processes

Nice to have

Experience with Bug Bounty (Hackerone, Intigriti, Bugcrowd etc.) a plus

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