Fintech · RWA · Asset Managers

DEFENSAHACKER

Boutique cybersecurity for fintechs, tokenization companies, real-world-asset platforms, and asset managers. Penetration testing, smart contract audits, and custody reviews.

Start a Conversation Our Services
defensahacker ~ recon

$ whoami

CEH · OSCP · CSCA · 20+ years

$ scope --target fintech,rwa,tokenization

Penetration testing · Smart contract audits · Custody reviews

$ status

Ready for engagement

Defensahacker Labs is a boutique cybersecurity consulting firm offering expert penetration testing, smart contract audits, and AI red teaming. Founded by a Certified Ethical Hacker (CEH) and Offensive Security Certified Professional (OSCP) with over two decades of hands-on experience — we help banks, fintechs, DeFi protocols, and enterprises identify and remediate critical vulnerabilities before attackers do.

20+
Years Experience
CEH
Certified Ethical Hacker
OSCP
Offensive Security
CSCA
Smart Contract Auditor
Services

What we do

01
⚔

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.

Web AppNetworkAPICloud
02
⛓

Smart Contract Audit

Blockchain and DeFi protocols introduce unique security challenges that traditional testing misses. A single vulnerability in a smart contract can result in irreversible financial loss. We go beyond the contract — auditing your entire ecosystem end-to-end.

SolidityDeFiRWATokenization
03
🤖

GenAI Red Teaming

LLM-powered applications introduce attack surfaces traditional tools do not cover. We test against prompt injection, jailbreaking, data exfiltration, and agentic privilege escalation.

Prompt InjectionAgent SecurityData Leak
About

Built on real experience

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 vast experience with all types of companies and engagements.

Founded by Jacobo Avariento, a Certified Ethical Hacker (CEH) and Offensive Security Certified Professional (OSCP) with over two decades of hands-on experience in cybersecurity.

CEHCertified Ethical Hacker
OSCPOffensive Security Certified Professional
CSCACertified Smart Contract Auditor
20+Years Experience
Why Us

Why Defensahacker

Senior-led

No junior analysts. Every engagement is led by a senior engineer with real attacker experience.

Business impact

Findings are written for CISOs and risk committees — attack narrative, proof, and remediation path.

Retest included

All critical and high findings are retested at no extra charge after remediation.

Fintech focused

Specialized in banks, fintechs, RWA platforms, tokenization, and asset managers.

Team

The team

JA
Jacobo Avariento
Founder & Security Lead

Certified Ethical Hacker, smart-contract auditor and lead security engineer with more than two decades in cybersecurity, concentrated in banking and finance.

FAQ

Frequently asked questions

What is penetration testing and why does my company need it?
A penetration test is a controlled simulation of a cyberattack against your systems, applications, or network. Fintechs and asset managers use it to satisfy PCI-DSS, ISO 27001, and SOC 2, and to find paths into client assets, issuance admin, and custody operations.
How is a smart contract audit different from a traditional security audit?
Token contracts are immutable once deployed, so a flaw in issuance, redemption, or share accounting is a balance-sheet problem. A smart contract audit combines manual review with fuzzing and invariant testing, and covers the off-chain systems — frontends, APIs, allowlists, and admin keys — where tokenized-asset losses usually start.
What is GenAI Red Teaming and does my AI product need it?
GenAI red teaming tests LLM-powered applications against prompt injection, jailbreaking, data exfiltration, and agentic privilege escalation. Fintech and asset platforms that use a model for support, onboarding, research, or operations have an attack surface traditional tools do not cover.
What does security look like for an RWA or tokenization company?
Issuance, custody, and redemption are one system. We review the token contracts with fuzzing and invariant testing, the MPC or multisig signing path, and the operator procedures around keys, allowlists, and reserve movements. Asset managers get the same review of the portal, admin roles, and integrations that can move client assets.
How long does a penetration test take?
Scope determines timeline. A web application pentest typically runs 3–5 days. A full internal network assessment spans 1–2 weeks. Smart contract audits for a medium-complexity protocol take 5–10 days. We include a retest of all critical findings at no extra charge.
Contact

Start a conversation

Ready to discuss your security needs? Reach out and we will get back to you shortly.

Email: contact@defensahacker.com