5+ years
Lead-level contract engineering with zero exploits in shipped code.
$whoami
Lead Smart Contract Engineer
I help Web3 teams ship smart contracts that survive production — and audits. 5+ years building protocols, plus two years on the other side of the table as an auditor, across regulated DeFi, RWA tokenization, OTC settlement, and cross-chain systems on EVM, StarkNet, and TON.
Solidity
Cairo
TON
Regulated DeFi
RWA
Cross-chain
Protocol Security
$cat ~/.profile
Profile
Day job: leading smart contract architecture at Swarm, an EU-regulated tokenized asset platform — tokenized equities, U.S. Treasury products, ETFs, gold-backed assets, OTC settlement, staking, rewards, and vault infrastructure. Built dOTC v2, Nifty Bundles, and Chainlink CCIP-based cross-chain RWA synchronization, all audited by PeckShield and Pessimistic, live across 10+ mainnets.
Before that, two years auditing at Hacken across DeFi, DAOs, marketplaces, and token systems — which is why teams call me both before they deploy and after something has already gone wrong on-chain. Zero exploits in code I've shipped.
$cat ~/metrics.log
2 years
Security reviews across DeFi, DAOs, marketplaces, tokens, and upgradeable systems.
10+ mainnets
Ethereum, Polygon, Base, BSC, Arbitrum, Optimism, Hedera, HyperEVM, Plasma, Mezo.
3 ecosystems
One contract codebase spanning Solidity, Cairo, and Threaded Solidity.
40+ contracts
Tokenization, compliance, settlement, and distribution across the full surface.
audited
Production protocols passed external audits; remediation owned end-to-end.
$ls ~/experience/
swarm — lead-sc-engineer
Lead architecture for an EU-regulated RWA platform. Shipped dOTC v2, Nifty Bundles, and CCIP cross-chain sync; set the team's engineering, testing, and audit-prep standards.
swarm — sc-engineer
Built the Permission Manager access-control backbone and three generations of the OTC protocol; Chainlink price-feed-based per-user compliance gating.
belong-net — multichain
EVM, StarkNet (Cairo), and TON contracts — NFT ticketing, token-gated access, check-in economy, and the $LONG token with DEX infra. Audited by Hacken.
m0narch — sc-lead
On-chain provably-fair iGaming — betting, settlement, payout, and treasury contracts with Pyth-based randomness through pre-launch architecture.
hacken — auditor
Audited tokens, staking/vesting, DAOs, marketplaces, upgradeable contracts, and DeFi protocols; triaged bug-bounty reports via HackenProof.
nethermind — research intern
Cross-Chain & Emerging Ecosystems program — interoperability primitives and secure design that later informed CCIP work.
$cat ~/skills.txt
Skills
- Languages: Solidity, Cairo (StarkNet), Threaded Solidity (TON)
- Standards: ERC-20, ERC-721, ERC-1155, ERC-4626
- Frameworks: Foundry, Hardhat, Locklift, OpenZeppelin, Solady
- Integrations: Chainlink CCIP, Chainlink Price Feeds, Pyth, Permit2, Uniswap/Pancake V3/V4
- Security: threat modeling, audit prep & remediation, Slither, MythX, invariant/fork testing
- Domains: regulated DeFi, RWA tokenization, OTC settlement, staking, rewards, vaults, NFT ticketing
- Other: TypeScript, Python, English C1, Certified Bitcoin Professional, Certified Ethereum Professional
$ls ~/projects/
dotc-v2
Open-access decentralized OTC — atomic escrow swaps, Chainlink pricing, KYC/AML-gated execution. PeckShield-audited; live on production mainnets.
ccip-rwa-sync
Chainlink CCIP mint-and-burn synchronization of metadata, approvals, and compliance state — a rare production CCIP integration for regulated RWA.
nifty-bundles
ERC721/ERC1155 → ERC20 vaults for bundled NFT exposure and fractional ownership. PeckShield-audited, Pessimistic-reviewed.
permission-manager
Foundational on-chain access layer with price-feed-based per-user spending limits across the RWA stack — first contract I owned end-to-end.
belong-checkin
Venue deposits, promoter attribution, ERC-1155 credit accounting, staking-tier fees, and $LONG buyback/burn — the platform's core economic loop.
long-token
$LONG logic plus Uniswap/Pancake V3/V4 routing, Permit2, and slippage checks — enabling listings on Binance Alpha, Gate, and MEXC.
$cat ~/credentials.txt
Education & Recognition
- PhD (in progress), MSc, and BSc in Electronics & Communications Engineering — National Technical University of Ukraine "KPI", Kyiv
- Certified Bitcoin Professional (CBP) and Certified Ethereum Professional (CEP) — CryptoCurrency Certification Consortium (C4)
- Springer book chapter — Blockchain-Based Electricity Settlement in Smart Grid Systems (2025)
- Vacuum Deep Tech startup winner; Aragon bounty winner and hackathon placements at Kyiv Tech Summit
- Languages: Ukrainian (native), English (C1)
$cat ~/.contact
Contact
Direct contact details are kept off this page on purpose. Open to Lead, Senior, and Architect roles in protocols, DeFi, RWA, and security — remote, EU hours. Introductions and identity verification are handled privately through trusted channels.
$echo "ready"
ready for private collaboration