mathsec
Blockchain Risk Analyst | Forensic Auditor (Ex Big 4)
A Security Researcher and Smart Contract Auditor in training, leveraging a 7-year background in Corporate Risk & Audit (Big 4 Alumni - EY/Deloitte).
Open to Internships and Junior roles in Security, QA, or Risk Analysis.
I combine the discipline of financial auditing with technical skills in Solidity and Python; understanding the financial impact of vulnerabilities.
Current Focus:
Completing the Cyfrin Updraft Security & Auditing curriculum.
Building a portfolio of audits and Python-based analysis tools.
Stack: Solidity, Python (Pandas/Web3.py), Foundry, Linux.
Experience: 1 year
Yearly salary: $30,000
Hourly rate: $20
Nationality: 🇧🇷 Brazil
Residency: 🇦🇪 United Arab Emirates
Experience
QA Engineer & Tech Support
Spark+ Technologies 2025 - 2026
Working daily with the development team in India to support clients in Qatar. I act as the bridge between the technical team and the business users to solve issues. Running technical demos and QA testing for the SOLO platform (EdTech). I report bugs and test fixes directly with the engineers to ensure the system is ready for local schools (like GSI). Using Python and API testing to analyze data and help the tech team improve system stability.
STEM Educator & Coding Club Lead (Volunteer)
International Programs School (IPS) 2025 - 2025
Coding Club Leadership: Created a student club focused on Python. Taught real-world skills using VS Code, Jupyter Notebooks, and GitHub. EdTech Integration: Updated Physics lab sessions using digital simulations (PhET) to help students visualize complex concepts. Mentorship: Helped Grade 10 students improve their grades and interest in STEM.
Private STEM Tutor (Math, Physics, Chemistry)
Self-Employed 2024 - 2026
Adaptive Learning: Created customized study plans for students with different learning needs. Results: Helped students improve their grades significantly during critical academic years.
Insurance Specialist
Atento 2023 - 2023
Analyzed insurance policies and customer data to ensure compliance and quality.
Portfolio Manager & Primary Caregiver
Family Estate & Care Management 2014 - 2022
Asset Management: Managed the family portfolio and real estate assets ensuring financial stability during a critical period. Financial & Legal: Handled all medical bureaucracy, insurance claims, and tax compliance (compliance is key here). Context: Career sabbatical to serve as the primary caregiver and administrator following a severe family accident. Successfully restructured the family's operations before returning to the corporate market.
Professor of International Accounting (Part-time)
Facisa BH 2012 - 2013
Subject Matter Expertise: Taught advanced courses on International Accounting and IFRS compliance, reinforcing technical knowledge applied daily at EY. Communication & Mentorship: Translated complex regulatory frameworks into practical, real-world case studies for undergraduate students. High Performance: Successfully balanced academic responsibilities with a full-time Senior Consultant role at a Big 4 firm.
Senior Risk Consultant (Audit)
EY (Ernst & Young) 2010 - 2014
Implemented COSO Risk Frameworks. Led audit teams to identify control weaknesses and financial anomalies. This experience gave me a deep understanding of compliance and vector attack analysis in financial systems.
External Auditor
Deloitte 2008 - 2010
Conducted external audits for big clients in manufacturing and construction. Tested internal controls and financial statements to ensure compliance with IFRS. Analyzed revenue, costs, and inventory data to find errors.
Skills
defi
python
smart-contract
solidity
web3-py
security
english
portuguese