Andrei Visoiu
Founder of MaaSec (ACM). Building secure, scalable cloud systems.
MaaSec: Netherlands' only active ACM Student Chapter focused on security. Cross-university events with TU Delft, Twente, Radboud, and VU Amsterdam.
OneTicket: Processed 2,100+ tickets across 85+ events on hardened AWS serverless infrastructure.
CTF: Assistant to captain. Achieved #3 national ranking in 6 months. Trained beginners into competitive team members.
About Me
Building secure systems at scale
I'm Andrei Visoiu, a third-year CS student focused on applied security and cloud systems. I founded MaaSec (ACM Student Chapter at Maastricht University), built OneTicket (serverless ticketing platform), and competed at #3 nationally in CTF.
Current work: Cloud security and supply chain guardrails. Policy-as-code for IaC, SBOM/attestation in CI/CD, deploy-time controls for serverless.
Certifications: CNSS, eJPT, Google IT Support. Rankings: HackTheBox top 0.01%, TryHackMe top 1%.
Open to summer 2026 internships and research opportunities.
Technical Skills
Featured Work
Projects
OneTicket
oneticket.one →Built serverless ticketing platform on AWS. 2,100+ tickets, 85+ events, zero downtime.
React frontend, AWS serverless backend (API Gateway, Lambda, DynamoDB), CloudFront CDN, S3/SES. Terraform IaC with staging/production isolation. Payment processing, admin panels, real-time scanner (20ms avg, multi-scanner support).
Handled 300+ ticket events with zero errors. Automated CI/CD pipelines.
Least-privilege IAM, JWT/HMAC rotation, rate limiting, input validation. HMAC webhook verification with replay protection. Structured logging, alerting, automated backup testing.
MaaSec
maasec.com →Founded the Netherlands' only ACM Student chapter. 0 to 90+ members in 10 months.
Built and trained CTF team as assistant to captain. #3 nationally in 6 months. Most members started with no security background.
Led participation in HALON 2025, SURF Quantum-Safe Cryptography Hackathon, WiCCON 2025, BSides Amsterdam 2025, and OZON 2025.
Contributed to CSLab infrastructure serving 1,700+ students. Directed Brightlands prize sponsorship.
Personally hosted Microsoft Security and DARPA AIxCC winner from Georgia Tech. Coordinated cross-university attendance (TU Delft, Twente, Radboud, VU Amsterdam).
UM Student Award 2025 finalist (6 finalists).
Featured in official university interview.
Guest on the Observant Podcast episode 8: exploring digital boundaries and capturing the virtual flag.
Secured €4k faculty budget for activities.
Security Consulting for Startups
Pro BonoLed 4-person team delivering security consulting to hardware startup. Client implemented all recommendations.
Led team selection, client interviews, and requirements scoping. Coordinated deliverable production and presented final security brief to stakeholders.
Security assessment report with architecture recommendations, threat model, infrastructure security guidance, and compliance overview.
Cloud Guardrails
Thesis DirectionIaC policy enforcement, SBOM/attestation in CI, deploy-time controls for serverless workloads.
Practical patterns that reduce misconfig and dependency risk for small teams.
Get in Touch
Let's Connect
Summer 2026 internships/research
Limited consulting and talks during term