/// @title

Eylül Balcılar

/// @notice Blockchain Developer

Work

  1. 2026 UProof 1st place, FIRSTBLOCK-ATHON Field verification system built in two days for a UNICEF field-work problem statement. Field workers independently attest to the same event and a confidence score comes from the overlap. I built the contract and cryptography layer in a team of four: on-chain proof registry, WebCrypto device-bound keys, an offline queue for low connectivity and a relayer for gasless submission. Solidity · Foundry · Base Sepolia · WebCrypto API · TypeScript · React
  2. 2026 Holdfast Uniswap Hook Incubator capstone Uniswap v4 hook for volatile pools. Risk-weighted liquidity provider scoring with partial impermanent-loss compensation, funded by fees the hook captures and supplies to Aave V3 for yield. Deployed and verified on Base Sepolia. Solidity · Foundry · Uniswap v4 · Aave V3 · React · TypeScript · Tailwind CSS · wagmi · viem
  3. 2026 Borgen RWA-backed lending protocol Owners of real-world assets borrow against them on-chain. A verified appraiser signs the asset's valuation on Neuro, the signed agreement is relayed to Base Sepolia as a collateral token, and the owner borrows up to 50% of its value from a shared lending pool. Positions above 80% debt or past due can be liquidated by anyone. Solidity · Foundry · Base Sepolia · Neuro · Express · MongoDB · Next.js · wagmi · viem · RainbowKit
  4. 2026 Runsten Proof of existence registry Proves that a document existed at a given time without putting the document on-chain. The file is hashed in the browser and only the digest is stored, with the sender and block timestamp. Anyone holding the same file can verify it for free. Solidity · Foundry · Base Sepolia · React · TypeScript · Tailwind CSS
  5. 2026 PixelVault Full-stack CRUD application Web3-themed NFT gallery: create, edit and delete listings, a live price ticker and MetaMask address display. Full CRUD REST API over MongoDB, with NFT metadata from the Alchemy API. Frontend and backend both deployed. React · Vite · Node.js · Express · MongoDB · Mongoose · Alchemy API

Stack

Languages
Solidity · TypeScript · JavaScript · HTML · CSS
Smart contracts
Foundry · EVM · Base · Uniswap v4 Hooks · Aave V3
Chain clients
wagmi · viem · RainbowKit · WebCrypto API · Alchemy API
Frontend
React · Next.js · Vite · Tailwind CSS
Backend
Node.js · Express · MongoDB · Mongoose · REST API
Practices
Contract deployment · responsive and mobile-first design · web accessibility · component-based development · Git-based collaboration

Contact