They attack
we protect
3.5M+
Number of websites compromised globally in 2024
75%
of attacks in 2025 can be prevented by penetration testing.
1 in 3
businesses will experience a cyberattack in 2025.
Every 39 seconds, a hacker breaks into a system somewhere in the world.
In the last 5 years alone, cyber attacks have risen by nearly 50% across industries.
Don’t wait until you’re the next victim. Start with a basic security test today.
We’ll show you where your system is strong, and where hackers see an open door.
OUR SERVICES
& EXPERTISE
Web Application Pentesting (Manual & Tool-Assisted)
We simulate real-world attacks on your web application to uncover vulnerabilities before attackers do. Our approach combines automated tools with deep manual testing to detect issues scanners typically miss.
API Security Assessments
We assess the security of your REST, GraphQL, or other APIs by identifying flaws in authentication, authorization, and data handling. Our testing covers real-world risks such as IDOR, rate-limiting bypass, and sensitive data exposure.
Infrastructure & Network Security Testing
We analyze your network and server infrastructure to identify open services, misconfigurations, and potential entry points. Tests can be performed from both external and internal perspectives, mimicking real attack scenarios.
Secure Code Reviews
We manually review your source code to detect security flaws that may not appear during runtime testing. This includes issues like unsafe input validation, insecure authentication logic, and misuse of security libraries.
Vulnerability Analysis & Remediation Guidance
We help you analyze vulnerability scan reports (e.g. from Nessus or Qualys) and guide you in prioritizing and resolving issues effectively. Our goal is to translate technical findings into clear, actionable steps.
Purple Team Assessments
A collaborative exercise where offensive (Red Team) and defensive (Blue Team) techniques are combined. This helps assess not only your technical exposure, but also how well your detection and response systems work under pressure.
WHO ARE WE?
HackerClass is a team of offensive security professionals focused on deep manual testing, the kind that finds what scanners can’t.
With real-world experience across fintech, SaaS, healthcare, e-commerce, enterprise software, cloud infrastructure, government systems, and startups and certifications like OSWE, OSCP,CNSS, CDP, eJPT, and others -> we bring clarity, precision, and discretion to every engagement.
In today’s environment, overlooking even one vulnerability can lead to massive financial and reputational damage. That’s why our clients choose us to get ahead of attackers, avoid costly breaches, and meet the highest standards of security.
If you need more than just a report – if you want results that matter, we’re ready!
WHY US?
500+ Projects
Over 500 security projects delivered across all types of clients and systems. We've seen it all, solved it all, and we bring that experience to every engagement.
100% Success
We’ve delivered a 100% success rate in every engagement, identifying real security risks, providing actionable solutions, and helping clients fix what matters. No noise. No guesswork. Just results.
Certified, Tested, Proven
Our team holds certifications including OSWE, OSCP, eJPT, CDP, CNSS, and more - proving deep expertise in web exploitation, DevSecOps, and real-world offensive security.
Quick, Flexible, Impactful
We pride ourselves on quick response times and flexible engagement models, adapting to your schedule and priorities to deliver effective security testing without disrupting your workflow.
Complete Discretion and Confidentiality
We ensure full confidentiality in every engagement, handling your sensitive information with the highest level of professionalism and trust.
Manual Penetration Testing
Our experts perform thorough, hands-on testing to uncover vulnerabilities that automated tools often miss, ensuring the most accurate and actionable results.
PROVEN WORK
REAL RESULTS
We’ve delivered high-impact security assessments across the most demanding and high-value sectors, including fintech, e-commerce, SaaS, healthcare, government, legal tech, blockchain, insurance, DevOps infrastructure, enterprise cloud platforms, and more.
These are the industries where security failures are costly, and where our clients trust us to find what others miss. All of our projects are led by Milan Veljkovic, our Lead Consultant and head of operations.
With deep technical expertise, hands-on leadership, and a proven ability to manage complex environments, Milan ensures that every engagement is handled with focus, clarity, and full accountability.
Our team has helped protect
GET IN TOUCH
Book a 30-minute call with our lead security consultant.
We’ll review your current situation, identify key risks, and outline how we can help – clearly, efficiently, and without the fluff.
Whether you already have security in place or you’re starting from scratch, this call will give you direction.
Limited availability -> schedule now to reserve your spot.