mnusurov

As a core contributor at Arkis - a DeFi Prime Broker, I led development of the smart contract framework powering under-collateralized leverage trading. The system integrated with major DeFi protocols including Uniswap, Aave, Morpho, ConvexFi, CurveFi, 1inch, and Pendle, built on the upgradeable Diamond pattern (ERC-2535) for efficient modularity and upgradeability. I owned the full technical lifecycle: architecture and implementation in Solidity, E2E testing with Hardhat and Forge on Anvil forks, unit testing with Foundry, and zero-to-upgrade deployment scripts via Hardhat Deploy and Tenderly. I also authored comprehensive NatSpec documentation across all contract interfaces, with HTML docs auto-deployed via GitHub Actions, and built DefiLlama adapters for protocol discoverability alongside Dune dashboards covering margin accounts, agreements, and vaults. The protocol underwent multiple independent security reviews: Quantstamp (2023), Trail of Bits (December 2024), Cantina (May 2025), and Spearbit (July & September 2025).

As a core contributor at Arkis - a DeFi Prime Broker, I led development of the smart contract framework powering under-collateralized leverage trading. The system integrated with major DeFi protocols including Uniswap, Aave, Morpho, ConvexFi, CurveFi, 1inch, and Pendle, built on the upgradeable Diamond pattern (ERC-2535) for efficient modularity and upgradeability. I owned the full technical lifecycle: architecture and implementation in Solidity, E2E testing with Hardhat and Forge on Anvil forks, unit testing with Foundry, and zero-to-upgrade deployment scripts via Hardhat Deploy and Tenderly. I also authored comprehensive NatSpec documentation across all contract interfaces, with HTML docs auto-deployed via GitHub Actions, and built DefiLlama adapters for protocol discoverability alongside Dune dashboards covering margin accounts, agreements, and vaults. The protocol underwent multiple independent security reviews: Quantstamp (2023), Trail of Bits (December 2024), Cantina (May 2025), and Spearbit (July & September 2025).

At Merehead I led smart contract development for two projects while simultaneously onboarding developers from non-blockchain backgrounds. For the BigFan platform I built NFT collectible and marketplace contracts (ERC-721 / ERC-1155). For the reBaked ecosystem I developed the core smart contracts and auxiliary libraries. Both projects were built with full OpenSea marketplace compatibility - including proxy account whitelisting for gas-free listings, contractURI for collection metadata, and structured metadata JSON schema for traits and attributes. A notable contribution was a pair of Solidity and JavaScript libraries for IPFS CID v1 / uint256 conversion, enabling on-chain IPFS metadata URI generation for token contracts - a non-trivial problem at the intersection of smart contract design and decentralized storage.

My entry point into professional smart contract development. I built and tested the full smart contract suite for the DefiStarter platform: DFS ERC-20 token, token presale contract, and the SPO (Safe Pool Offering) mechanism. Deployed all contracts to Ethereum mainnet and successfully completed a security audit with MixBytes.

At HodlTree I designed, tested, and deployed a full suite of DeFi primitives from scratch: a Lend & Borrow protocol, Flash Loans 2.0, Stable Swaps built on top of Flash Loans, Elastic Hedge Modules, a multi-protocol Arbitrage Kit capable of composing multiple operations in a single transaction, and HodlSwap — a Uniswap v2 fork with significant gas optimizations. I also developed Create3Factory with EIP-3171 emulation for vanity address deployments, and built a vanity address generator in both C++/OpenCL (GPU-accelerated) and multithreaded Node.js. I installed and maintained a full Ethereum node (Geth) and successfully guided the Flash Loans 2.0 contracts through a Certik security audit. This role deepened my expertise in inline assembly, delegatecall patterns, upgradeable proxies, and oracle integrations across protocols like Aave, Balancer, Curve, Uniswap v3, and Chainlink.