Cosmin-Marian Lavric
Web3 Security Researcher & Smart Contract Auditor
📍 Brasov, Romania
Web3 Security Researcher specializing in Solana (Rust), Move (Sui), and Ethereum (Solidity). Top 3 Cantina finish. Top 5.7% on Sherlock. Built and security-hardened a ZK privacy protocol on Solana with Groth16 on-chain verification and 7 security fixes from Solana Foundation audit. Protects decentralized protocols through manual review, invariant testing, and automated tooling.
Work Preferences
Salary
USD 20,000 – 120,000
Skills
Work Experience
Independent Security Researcher
Cantina / CodeHawks / Sherlock / Code4rena / Cyfrin
Aug 2025 — Present
3rd/723 in Kuru Contracts (Cantina). 23rd/316 in Avon Protocol (Cantina Private). 29th/509 in CurrentFinance (Sherlock) in Move/Sui DeFi. Shadow-audited Aave V4. Top 5 on CodeHawks First Flights with 2 High and 3 Medium severities. 10+ published audit reports.
Cybersecurity Fundamentals Participant
IBM Summer School
Jul 2025 — Jul 2025
Built 2FA (TOTP + QR), SSO/RBAC, threat-modeling. Ran pen testing labs covering DoS, MITM, SQLi, and XSS.
Blockchain Full-Stack Engineer
SkyTrade
Nov 2024 — Feb 2025
Built cNFT minting platform and DEX on Solana using OpenbookDEX protocol.
Web3 Developer & ZK Engineer
Freelance
Jun 2024 — Present
Built and security-hardened PunkZ Vault: Tornado Cash-inspired ZK privacy protocol on Solana with Groth16 verifier, Poseidon hashing, incremental Merkle tree, nullifier tracking. Built Ethereum ZK mixer (PunkZ Contracts) with Noir circuits. Created ZK ECDSA Verifier, CCIP Rebase Token with Chainlink CCIP, and X-Scout automated threat intelligence pipeline (500+ daily data points).
Education
Cyfrin
Assembly and Formal Verification
2025 – 2025
Cyfrin
Smart Contract Security
2025 – 2025
Cornell University
Blockchain Essentials
2024 – 2024
Solana Foundation
Solana Blockchain Developer Program
2024 – 2024
Udemy
Ethereum and Solidity - Complete Developer's Guide
2024 – 2024
IBM
Introduction in Software Engineering
2024 – 2024
University of Transylvania Brasov
BSc · Electrical Engineering and Computer Science, Information Technology
2022 – 2026