Application & AI Security Engineer

AdTech Holding is an Innovation hub based in Cyprus, which creates vibrant startup ecosystems and technologies for AdTech & MarTech projects.

Since 2011, AdTech Holding has been a starting point for an array of industry-leading advertising and digital marketing companies (PropellerAds, Zeydoo etc). Holding brings the most daring ideas to the market and creates cutting-edge solutions to deliver technology globally.

We are looking for an Application and AI Security Engineer for our Security Department!

Responsibilities:

• Run security reviews of services, integrations and public APIs before they go to production, including manual review of critical code.
• Do threat modeling for new features with product teams at the design stage.
• Own security checks in the development lifecycle (static analysis, dependency scanning, secret detection), covering coverage, rules and triage of findings with teams.
• Build a unified vulnerability management process, including the vulnerability register, prioritization, SLAs, retesting and bug bounty.
• Secure AI integrations and define access policies for service and AI agent accounts.
• Run penetration tests and audits: scope them, accept the results and follow findings through to systemic fixes.
• Develop and maintain standards and practices for developers, including secure development requirements, guidelines and team training.

Requirements:

• 3+ years of experience in application security, covering code and architecture reviews, SAST, DAST, SCA and OWASP.
• Strong manual testing skills and hands-on experience with static analysis, including writing your own custom rules.
• A solid understanding of how authorization works in practice: OAuth, OIDC, JWT, token scopes and delegated permissions.
• Ability to read PHP, Go and JavaScript code and to automate tasks in Python or Bash.
• Ability to drive results with teams you don’t manage directly, including through security champions.
• Interest in LLM application security, such as prompt injection and AI agents’ access to data.
• Working proficiency in Russian and English.

What you should know

• Manual testing with Burp Suite or ZAP
• Static analysis
• Dependency scanning
• Secret detection in code
• Vulnerability management
• OWASP Top 10
• OWASP API Security Top 10
• OWASP Top 10 for LLM Applications
• ASVS

Our stack:

• Languages: PHP (Symfony), Go, JavaScript/TypeScript, Python
• Data: PostgreSQL, MySQL, ClickHouse
• CI/CD: Docker, GitLab/GitHub, TeamCity
• Security: SonarQube, Nessus
• OS: Linux

Nice to have:

• Experience in AdTech or other high-load environments
• DevSecOps experience
• Experience testing LLM applications
• Bug bounty or CTF experience
• OSWE or GWEB certification

We offer freedom of choice: with us, you'd have a cafeteria benefits system where you can choose which benefits would fit your individual needs.
And, of course, a standard pack of benefits as well: health insurance, fully covered 10 working days of sick leave per year, 5 additional day-offs per year, English and other languages compensation, quarterly, and annual bonuses, corporate events, gifts, gym at the office, also food (yummy!) - you can find snacks in our worldwide working spaces and breakfasts & lunches in the offices!

Please note, that by applying to this position, you confirm your consent to the processing of your personal data for recruitment purposes