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- Led smart contract development for an on-chain iGaming platform focused on provably fair betting and fully on-chain game mechanics — testnet deployments and pre-launch architecture. - Designed Solidity-based contracts for betting flows, game settlement, payout mechanics, treasury and fee handling, plus reusable modules intended to support a multi-game roadmap. - Integrated Pyth for fairness-critical game outcomes, enabling transparent on-chain verification of randomness, settlement, and payout logic — a core requirement for the provably-fair claim. - Owned contract architecture, testing methodology, security hardening, and deployment workflows through pre-launch — including coordination with product and frontend teams on contract interfaces.

Contract engagement on Belong Net's multichain Web3 platform — NFT ticketing, token-gated access, venue check-ins, referral rewards, and $LONG token utility. - Shipped production Solidity contracts for the EVM platform — ERC-721 AccessToken, ERC-1155 CreditToken, factory deployments, royalties, vesting wallets, escrow, staking, $LONG token logic, signature verification, and Belong CheckIn flows. Contracts live across the platform's supported EVM chains. - Built Belong CheckIn protocol logic end-to-end — venue deposits, customer payments, promoter attribution, ERC-1155 credit accounting, staking-tier fees, escrowed payouts, and $LONG buyback/burn routing. This is the core economic loop of the Belong platform. - Implemented DEX swap infrastructure for $LONG/USD-token flows across Uniswap/Pancake-style routers (V3/V4), including Permit2 approval handling, price-feed-based slippage checks, fork tests, and deployment scripts — enabling $LONG's listing on Binance Alpha, Gate, and MEXC. - Shipped StarkNet/Cairo contracts — NFT factory, NFT minting, royalty receiver, referral logic, SNIP-12 hashing, and signature-based mint authorization — bringing Belong's NFT layer to StarkNet's execution environment. - Built TON/Threaded Solidity contracts for TIP4 NFT collections — factory-based deployment, permit-based static/dynamic minting, TIP3 token payment handling, native TON payments, royalty splitting, referral commissions, and wallet deployment/callback handling — extending Belong's reach into the TON ecosystem. - Wrote Hardhat, Foundry, StarkNet, and Locklift tests, mocks, deployment, upgrade, and verification scripts across EVM, StarkNet, and TON ecosystems — multi-ecosystem coverage maintained from a single contract codebase. - Contracts audited by Hacken (Q4 2024 / Q3 2025 reports) — published at audits.hacken.io/belong-net.

- Lead smart contract architecture for Swarm's EU-regulated RWA platform — tokenized equities, U.S. Treasury products, ETFs, gold-backed assets, OTC settlement, staking, rewards, and vault infrastructure. Shipped dOTC v2 to production — Swarm's open-access decentralized OTC settlement protocol with atomic escrow swaps, Chainlink price feeds, and KYC/AML-gated execution. Passed PeckShield audit; live across Swarm's target mainnets. - Architected and shipped new version of RWA with Chainlink CCIP-based cross-chain synchronization using mint-and-burn flows for metadata, approvals, and compliance-state consistency — one of the few production CCIP integrations for regulated RWA infrastructure. - Built and shipped Nifty Bundles — ERC721/ERC1155-to-ERC20 vault system enabling bundled NFT exposure and fractional ownership. Passed PeckShield audit; remediation also reviewed by Pessimistic. - Own multiple production smart contract product lines, including a single RWA product line with 40+ deployed contracts across the full feature surface (tokenization, compliance, settlement, distribution). - Maintain production deployments across 10 mainnets — Ethereum, Polygon, Base, BSC, Arbitrum, Optimism, Hedera, HyperEVM, Plasma, Mezo — with per-chain configuration, deployment scripts, and upgrade flows. - Set the team's smart contract engineering standards — architecture patterns, testing methodology, security review checklist, audit preparation flow, technical documentation. These are now the default baseline for new contract work and every subsequent external audit engagement. - Review contract code from a small team of engineers and define contract-side interfaces for the frontend, backend, and indexer teams — including event schemas, API expectations, and failure-case handling.

Focused on smart contract security across DeFi, DAOs, marketplaces, and token systems. - Performed smart contract audits across tokens, staking and vesting systems, DAOs, marketplaces, upgradeable contracts, and DeFi protocols on EVM ecosystems — building deep familiarity with common attack surfaces and exploit patterns. - Identified vulnerabilities in access control, reward accounting, upgradeability flows, business logic, and oracle/integration patterns — with a focus on exploit prevention before production deployment. - Through HackenProof — triaged and validated incoming vulnerability reports, reproduced issues, assessed severity and impact for client-facing security workflows. - Applied secure development and gas-efficiency practices using Hardhat, Foundry, Slither, MythX, and OpenZeppelin patterns — toolchain that I now use on the writer side of the table at Swarm and Belong Net.

Joined to build out Swarm's contract layer for the EU-regulated RWA roadmap. - Shipped Permission Manager as the foundational access-control layer for Swarm's RWA platform — first significant production contract I owned end-to-end, and the first mainnet deployment under my name on the protocol. Became the access-control backbone for tokenized equities, treasuries, and subsequent RWA product lines. - Designed and shipped three generations of the OTC settlement protocol — PermissionedDotc, OpenDotc V1, and OpenDotc V2 — iterating on swap mechanics, access patterns, and compliance gating across each version. OpenDotc V2 passed PeckShield audit and became the production OTC layer that ships today as dOTC v2. - Built and integrated Chainlink price feeds into Permission Manager to enforce per-user spending limits in real time — on-chain regulatory control that gates transactions based on USD value relative to each user's compliance tier. Became the foundation for price-dependent compliance flows across Swarm's RWA stack. - Established the team's contract testing and documentation patterns using Hardhat and Foundry — became the audit-readiness baseline for every later engagement (PeckShield, Pessimistic). - Owned remediation across early external audit cycles, converting audit feedback into permanent team checklist items and architectural guardrails carried forward into Lead-level work.