Open to opportunities

Tea Celikik

@teacelikik

Message

I build and harden Python web applications, remediating OWASP vulnerabilities and securing multi-tenant systems.

North Macedonia

Message

What I'm looking for

I'm looking to contribute to secure software development and application security work, including vulnerability remediation, secure authentication, cloud security, and hands-on security testing.

At BeyondMachines, I developed secure Django enrollment modules for a cybersecurity education platform, including bulk email import, DNS record validation, domain allow-listing, deduplication, and SHA-256 plus pepper hashing for data-at-rest protection. I also built asynchronous AWS Lambda and SES email pipelines with enumeration-safe errors and automatic personal-data purging after delivery.

I've hardened multi-tenant Django applications against IDOR exposure, performed exploitation and remediation across 15+ OWASP vulnerability classes, and built a centralized Flask login-code service with pytest and unittest.mock coverage. My hands-on security work also includes Nmap scanning, vulnerability enumeration, SELinux policy enforcement, Drupal assessment, Metasploitable credential testing, and Java-based distributed system monitoring.

Experience

Work history, roles, and key accomplishments

Cybersecurity Intern

BeyondMachines

Jun 2026 - Sep 2026 (3 months)

Developed secure user-enrollment modules in Django for a cybersecurity education platform, including bulk email import with DNS validation and SHA-256 hashing. Eliminated IDOR vulnerabilities and hardened multi-tenant isolation by enforcing organization-scoped queries and composite constraints.