4
top cybersecurity certifications
+150
penetration testing projects
+20
years experience
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Penetration Testing
We simulate real-world cyberattacks on your systems, networks, and applications to uncover vulnerabilities before malicious actors do — delivering a clear picture of your true risk exposure.
Our assessments cover cloud environments, internal networks, mobile apps (Android & iOS), IoT, and OT infrastructure — validating the strength of your defenses across every attack surface.
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Smart Contracts Audits & DeFi Security
Blockchain and DeFi protocols introduce unique security challenges that traditional testing methods miss. A single vulnerability in a smart contract can result in irreversible financial loss.
We perform in-depth audits of your smart contracts, DeFi protocols, and deployment infrastructure — identifying critical flaws before they can be exploited on-chain.
Because most Web3 exploits target Web2 components like frontends and DNS, we go beyond the contract — validating your entire ecosystem end-to-end.
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AI Audits – GenAI Red Team
As organizations rush to adopt generative AI, new attack surfaces emerge. Our AI Audits and GenAI Red Teaming services identify vulnerabilities in AI pipelines, LLM integrations, and agentic systems before adversaries exploit them.
We deliver actionable risk assessments aligned with OWASP GenAI Top 10, concrete remediation guidance, and compliance support — so your AI initiatives are both innovative and secure.
Cybersecurity Excellence
Ethical Hacking involves simulated cyberattacks on a system, network, or application to identify vulnerabilities and weaknesses that malicious hackers could exploit. It helps assess the effectiveness of existing security measures.
Having worked as a consultant and penetration tester for top tier banks, the European Central Bank, pharmaceutical and automotive companies across several regions and continents. We have a vast experience in all types of companies and projects.
Our Team
Extensive experience tailored for your needs
Jacobo Avariento
Security Lead
Jacobo is a Certified Ethical Hacker, smart contracts auditor and lead security engineer with over 20 years of experience in cybersecurity, particularly within the banking and finance industries
Client Testimonials
United
We have been impressed with this persistence in finding bugs, his ability to explain his findings and Mr. Avariento is welcome and respected contributor to our Bounty program and we look forward to any additional submissions he provides
Airbus
Mr. Avariento was entrusted with the Technical Management of the Security Testing project team at the European Central Bank. He always fulfilled his tasks to our absolute satisfaction. He was extremely skilled employee and always served our customers very courteously and professionally
HP Enterprise
Hewlett Packard Enterprise would like to thank Jacobo Avariento working with Defensahacker for reporting CVE-2017-12544
Contact Info
Let’s Chat
Get in touch with us to discuss your needs.