I'm Sammed S B
Web3 Frontend Developer building DeFi applications where decentralized finance meets polished user experiences.
I bridge intuitive frontend experiences with decentralized technologies. Crafting production-ready dApps using TypeScript, Next.js, and Ethers.js, powered by Solidity smart contracts on the backend.
Skills
- Solidity
- Ethers.js
- Web3.js
- DeFi
- Account Abstraction
- Subgraph
- Uniswap V4 Hooks
- Fhenix
- RainbowKit
- ShadCN
- TypeScript
- JavaScript
- React
- Next.js
- Node.js
- Tailwind CSS
- Zustand
- Redux
- GraphQL
- Express
- MongoDB
- PostgreSQL
- Git
- Framer Motion
Experience
Built the Earn dashboard with cross-chain YieldCoin balance tracking, APY calculations, and portfolio analytics for Bitcoin, Monero, and Ethereum. Developed YieldCoin deposit and withdraw flows, abstracting complex yield logic into a simple user experience. Implemented multi-chain balance fetching using Ethers.js, fallback RPCs, and Zustand, improving performance and reliability. Collaborated with protocol engineers on Safe App integration and frontend support for future CCIP/CRE-based yield optimization. Built a protocol subgraph to index on-chain events, improving data consistency and enabling fast, query-driven frontend state updates. Implemented Account Abstraction (ERC-4337) for gasless transactions, smart account management, and improved onboarding for non-crypto-native users.
Contributed to FerrySwap, a decentralized exchange on Serai Layer 1, enabling cross-chain swaps between Bitcoin, Monero, and Ethereum. Designed and implemented a multi-chain UI for keystore-based wallets (Monero, Bitcoin, Ethereum) and EVM-compatible connections. Refactored and optimized core UI components using TailwindCSS and ShadCN, aligning with the Figma design system. Integrated RainbowKit for wallet connections and custom keystore authentication for non-EVM chains. Collaborated with design and backend teams on frontend logic, smart contract interactions, event listeners, and on-chain data fetching. Enhanced maintainability with ESLint standards, logical import grouping, and improved code quality.
Completed the Uniswap Hook Incubator cohort, building Uniswap V4 hooks and capstone projects. Built TrunkGuard — a confidential swap protocol on Fhenix using Fully Homomorphic Encryption for private on-chain swaps.
Redesigned the entire application UX, fixed critical blockchain data bugs using Ethers.js and GraphQL, improved performance rating from 40 to 70, and built subgraph integrations for new smart contracts.
Frontend Developer @ Girnar Sales
Remote (Freelance)
Developed a bespoke internal tool with login, customer management, and sales features. Designed user-friendly interfaces with REST API integration.
CSE Graduate
Hubli, Karnataka
Graduated from KLE Institute of Technology with a degree in Computer Science and Engineering.
Projects
Judge Finance – Earn Dashboard
Full-stack DeFi dashboard with cross-chain YieldCoin balance tracking, APY calculations, and portfolio analytics. Built deposit/withdraw flows, multi-chain balance fetching (Ethers.js, fallback RPCs, Zustand), protocol subgraph for on-chain event indexing, and Account Abstraction (ERC-4337) for gasless transactions and smart accounts.
FerrySwap DEX
Decentralized exchange on Serai Layer 1 enabling cross-chain swaps between Bitcoin, Monero, and Ethereum. Multi-chain UI with keystore-based wallets, RainbowKit integration, and custom non-EVM authentication. Built with TailwindCSS and ShadCN.
TrunkSwap Dapp
Developed TrunkSwap, a DEX using Uniswap V2 fork on Arbitrum Sepolia. Built responsive frontend with Next.js, integrated Ethers.js for blockchain interactions, RainbowKit wallets, Chainlink Oracle pricing, and Zustand state management.
Get in Touch
Contact me directly at sammed2110@gmail.com or through this form.