Smart Contract Development
Production-grade smart contract engineering on EVM-compatible networks (Solidity) and Solana (Rust/Anchor). Security-first design: threat modeling, test-driven development, static analysis (Slither, Mythril) on every commit, formal verification for critical financial logic. Patterns: upgradeable proxies, multi-signature governance, time-locks, access control hierarchies, emergency pause mechanisms, gas optimization.
Decentralized Application (DApp) Development
Full-stack DApp development: React/Next.js frontend connecting to smart contracts via ethers.js or viem, wallet connection (MetaMask, WalletConnect, Rainbow Kit, Privy), transaction UX design, event listening for real-time UI updates, The Graph Protocol for indexed data queries.
NFT Marketplace Development
Custom NFT marketplace platforms: minting contracts (ERC-721/ERC-1155), marketplace contracts (fixed price, auctions, offers), royalty enforcement (EIP-2981), lazy minting, IPFS/Arweave storage, collection dashboard, creator analytics. Built on Polygon or Ethereum based on use case.
Token Development
ERC-20 utility/governance tokens (custom supply mechanics, vesting, governance integration), asset tokenization (real-world assets with compliance hooks), ERC-721/ERC-1155 for NFTs. Represent real estate, commodities, private equity as on-chain tokens with transfer restrictions (ERC-1400, ERC-3643).
Crypto Wallet Development
Custom crypto wallet applications: custodial wallets (enterprise key management), non-custodial wallets (user-controlled keys with seed phrase, hardware wallet support), multi-signature wallets (M-of-N approval). Mobile in React Native with biometric auth, secure element key storage, WalletConnect integration.
Smart Contract Security Audit
Comprehensive security review: automated analysis (Slither, Mythril, Echidna), manual code review against SWC registry, business logic review, economic attack vector analysis (reentrancy, flash loans, oracle manipulation, sandwich attacks). Written audit report with severity-rated findings and remediation guidance.