Open to opportunities

Mateusz Bardzik

@mateuszbardzik

Message

Senior blockchain protocol engineer specializing in Solidity and Rust for secure, upgradeable DeFi systems.

Poland

Message

What I'm looking for

I seek remote/global roles focused on protocol-level engineering, secure upgradeable architectures, and DeFi systems where I can lead smart contract design, audits, and gas/storage optimization.

I am a protocol-level engineer with 7+ years building and securing production-grade DeFi systems across EVM and Solana ecosystems. I design and deploy upgradeable architectures, implement ERC-4626 vaults, build Solana programs in Rust, and optimize gas and storage layouts to reduce costs and harden contracts.

I have led staking protocol architecture, conducted 50+ audits identifying critical vulnerabilities, and built security-first testing suites and CPI-based Solana integrations. I bring hands-on experience with exploit simulation, cross-chain liquidity validation, and large-scale on-chain data processing to deliver resilient blockchain infrastructure.

Experience

Work history, roles, and key accomplishments

Current

Senior Blockchain Protocol Engineer

Current

Transit Finance

Jan 2023 - Present (3 years 2 months)

Architected and deployed a full staking protocol and upgradeable UUPS contracts on mainnet, implemented ERC-4626 vaults, and reduced gas costs by 18% through storage/layout optimizations. Built Solana programs in Rust (Anchor) managing mint authority and secure CPI flows while designing cross-chain liquidity and swap validation.

Solidity Rust ERC 4626 Gas Profiling Anchor CPI

Smart Contract Security Engineer

AuditBase

Jan 2021 - Jan 2023 (2 years)

Conducted 50+ Solidity audits identifying reentrancy, privilege escalation, and upgradeability issues; simulated flash loan and oracle-manipulation attacks and delivered exploit PoCs with remediation guidance. Built Foundry testing suites to validate protocol behavior under adversarial conditions.

Smart Contract Auditing Foundry Slither Mythril Upgradability Oracle Manipulation

Blockchain Engineer

Arkham Intelligence

Jan 2018 - Jan 2021 (3 years)

Built Solana programs in Rust using Anchor with PDA-based validation and CPI integrations, and engineered blockchain ingestion pipelines processing 2TB+ monthly to support anomaly detection for token transfer patterns.

Rust Anchor PDA Derivation CPI Data Processing Anomaly Detection