Mahmoud Fathy
Blockchain Engineer
Security-focused Blockchain & Smart Contract Engineer capable of building production-grade full-stack Web3 dapps on EVM and Solana. Specialized for years in adversarial review to ensure correctness, safety and security of well-known protocols.
About Me
I am a Blockchain and Smart Contract Engineer with over four years of focused experience in Web3 space and more than a decade of engineering experience overall. My work centers around designing, implementing, and adversarially reviewing Smart Contracts on-chain, primarily across EVM-based ecosystems, with hands-on exposure to Solana development using Anchor & Pinocchio. I have audited top-tier protocols, analyzed complex exploit patterns with proof of concepts, carry out fuzz testing and formal verification to ensure expected behaviour is persistent accross a wide range of inputs.
Location
Germany
Focus Areas
EVM · Security · DeFi · Solana
Role
Blockchain Security Engineer
Languages
Arabic, English, German, French
Work Experience
Blockchain Security Researcher
Zokyo
- Conducted in-depth security audits for early-stage and high-profile Web3 protocols, delivering structured findings reports.
- Performed manual code review, invariant analysis, unit testing, and fuzz testing to uncover logic flaws, edge-case failures, and exploitable attack surfaces in EVM-based Smart Contracts.
- Contributed adversarial analysis and expanded test coverage for complex protocols including World Liberty Finance (WLFI) and LayerZero, identifying critical vulnerabilities prior to deployment.
- Collaborated directly with client teams to communicate risk clearly, validate fixes, and ensure secure remediation before deployment.
- Authored technical blog posts highlighting interesting audit findings, tools and security best practices to educate teams and the broader Web3 community.
Independent Software Developer
Independent
- Led and delivered end-to-end software systems across blockchain, backend, and frontend stacks, operating as lead and often sole engineer across multiple independent projects.
- Designed and implemented a blockchain-based NFT presale for a game, owning the full smart contract lifecycle including architecture, testing, Web3 frontend , backend workers, distributed storage and database design.
- Contributed to a proof-of-concept distributed ledger architecture for a US-based client, focusing on message-passing patterns which serves as the low layer fabric for their blockchain.
- Built and delivered a cross-platform mobile attendance management application as an independent project alongside full-time employment as a lecturer.
Academic Staff Educator
National Telecommunication Institute
- Delivered hands-on technical training as part of government-sponsored education and upskilling initiatives, teaching recent graduates, fellow academic staff personnels, and technical college students.
- Designed and taught curricula spanning computer networks, cloud infrastructure, programming, and applied systems engineering, balancing students' theoretical foundations with practical implementation.
- Supervised diploma and graduation projects, guiding students through system architecture, implementation, testing, and technical evaluation.
- Participated in certified academy programs aligned with enterprise technologies, including VMware, Cisco, and Huawei, ensuring training reflected real-world industry standards.
- Supervised diploma and graduation projects, guiding students through system architecture, implementation, testing, and technical evaluation.
Projects & Highlights
Audited TVL
$5B+
Value secured across projects audited.
Skills & Expertise
Blockchain
Smart Contracts
Security & Auditing
Backend
Frontend
DevOps & Cloud
Data & AI
Let's Connect
Have a project in mind or want to discuss blockchain solutions? I would love to hear from you.