Open to engagements

Aristofanis
Chionis Koufakos

Offensive security professional specializing in penetration testing and red team operations for financial institutions. BlackHat Europe speaker. Founder of IMIZI Cyber in Kigali, Rwanda.

50+
Pentest engagements
8
Countries
400+
Professionals trained
4+
Years in security
OSCP+ OSCP PNPT PJPT

Experience

— now

Founder & Lead Pentester

IMIZI Cyber — Kigali, Rwanda

Offensive security consultancy serving BNR-regulated financial institutions across East Africa. Penetration testing, red team operations, and cybersecurity compliance assessments.

PentestingRed TeamBNR ComplianceEast Africa
—

Senior Cyber Security Consultant

Yinkozi Middle East — Dubai, UAE

Lead penetration tester handling all client engagements end-to-end. Delivered web, mobile, API, and infrastructure assessments for Tier-1 African banks across multiple countries. Engineered a mobile security SDK for a major South African fintech.

Web PentestMobile PentestAPI SecuritySDK Engineering
—

Internal Red Team & Penetration Tester

Danske Bank — Copenhagen, Denmark

Red team member at Denmark's largest bank. Adversary simulation, penetration testing, and security assessments on critical banking infrastructure. Designed and ran CTF events training 400+ employees across the entire organization.

Red TeamActive DirectoryBankingCTF
—

FullStack Developer & Software Engineer

CERN · Nordea · Freelance

Web application development at CERN (Slides tool, open-sourced and still in use). Developer at Nordea (Nordic financial services). Three years of full-stack development before transitioning to offensive security.

JavaScriptReactNode.jsPython

Featured Work

Honeyscanner

Open-source vulnerability analyzer for honeypots. MSc thesis at DTU, built during Google Summer of Code 2023. Presented at BlackHat Europe Arsenal.

IMIZI Cyber

Offensive security consultancy for financial institutions in East Africa. Pentesting, red team, and BNR compliance from Kigali.

CERN Slides

Web-based presentation tool developed at CERN. Open-sourced and still actively used within the organization.

Speaking & Open Source

BLACKHAT EUROPE 2023 — ARSENAL

Honeyscanner: A Vulnerability Analyzer for Honeypots

Presented a tool for detecting vulnerabilities in honeypot deployments. Built as MSc research at DTU, refined during Google Summer of Code 2023.

GOOGLE SUMMER OF CODE 2023 & 2024

The Honeynet Project

GSoC 2023 contributor developing Honeyscanner. Returned as mentor in 2024 to guide new contributors on honeypot security research.

What I Do

Web Application Pentesting
Mobile Security (Android & iOS)
API Security Assessment
Network & Infrastructure Pentesting
Red Team & Adversary Simulation
Security Engineering & SDK Dev
Compliance (BNR, NIST, OWASP)
Security Training & CTF Design
Engagements delivered across: Rwanda, South Africa, Kenya, Uganda, Mozambique, Seychelles, Denmark, and the UAE.

Education

MSc Computer Security
Technical University of Denmark (DTU)
—
BSc Computer Science
University of Athens (NKUA)
—
Erasmus Exchange
Ulster University, Northern Ireland

Work With Me

Hire IMIZI Cyber

Professional penetration testing and security consulting for financial institutions across East Africa.

Visit IMIZI Cyber →

Get in Touch Directly

For freelance engagements, speaking opportunities, collaborations, or recruitment inquiries.

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