vutharmony

Senior Blockchain Engineer · Smart Contracts & Full Stack D Apps

I'm a blockchain engineer with 6 years of experience writing smart contracts and building the apps around them. I work in Solidity and Rust on Ethereum, Solana, BNB Chain, Polygon, and Sei, and in TypeScript, React, Next.js, and Node.js on the product side.

Right now I'm a Web3 Engineer at Tilted, an AI-powered social gaming platform. I wrote and audited the reward and asset ownership contracts behind its Stream-to-Earn program, which serves 20,000+ early users. I also built Tag-to-Earn, which uses AI to spot in-game moments in live streams and turn them into on-chain rewards. Before that, I built a GameFi app that reached 10,000+ active users in its first month, NFT marketplaces on Polygon and Ethereum, and token sale contracts.

I'm looking for a senior blockchain or full stack Web3 engineering role where I can own both the smart contracts and the product built on them. I'm most interested in DeFi, on-chain gaming, and consumer crypto apps. I'm open to remote full-time or contract work.

Experience: 7 years

Yearly salary: $54,000

Hourly rate: $30

Nationality: 🇻🇳 Vietnam

Residency: 🇻🇳 Vietnam

Experience

Senior Frontend Developer

Kasha

2025 - 2025

Led frontend development of the platform with Next.js, React, and TypeScript. Built real-time dashboards for live market data, transaction history, and risk metrics over REST and WebSocket APIs. Reduced bundle size by 30% through code splitting, lazy loading, and state management with React Query and Zustand. Defined TypeScript-first API contracts with the backend team, cutting runtime errors by 40%. Implemented OAuth 2.0 and JWT authentication with access control for multi-tenant environments. Built a drag-and-drop dashboard and landing page builder with CraftJS, and set up Storybook for the shared component library. Ran A/B tests on key financial workflows that raised engagement by 25%, and mentored junior developers on TypeScript and Next.js.

Full Stack Engineer

Bee Techy

2022 - 2025

Built a GameFi mobile app with NFT assets and play-to-earn mechanics that reached 10,000+ active users in its first month. Led development of an NFT marketplace on Polygon with mobile-first wallet connection and transaction flows. Wrote smart contracts on Ethereum and BNB Chain to add DeFi features to the companyʼs blockchain service offerings. Built cross-platform iOS and Android apps with React Native, TypeScript, and Flutter, including waypoint mapping and offline support. Shipped AI features, including chatbots and image generation, in client applications. Migrated a fishing map web platform from PHP to React/Preact. Improved code review and release workflows, raising team productivity by 25% and shortening release cycles.

Blockchain Developer

DMG Blockchain Solutions

2020 - 2022

Developed and deployed smart contracts in Solidity Ethereum, BNB Chain) and Rust Solana. Built an NFT minting game where players acquire and evolve characters owned on-chain. Built a mobile-first NFT marketplace for uploading, minting, and trading NFT Zombie cards. Wrote and deployed Solidity contracts for token sales ICOs. Built crypto wallet features and integrated them into React Native dApps. Used IPFS for decentralized storage of NFT metadata, files, and digital assets. Tested and deployed contracts with Hardhat, Truffle, Remix, and Ganache.

Skills

blockchain

bnbchain

ci-cd

defi

docker

erc-1155

erc-20

erc-4626

erc-721

ethereum

ethereumjs

evm

firebase

full-stack

golang

graphql

hardhat

kubernetes

mongo

nextjs

nft

node

openzeppelin

polygon

postgres

python

react

react-native

rust

solana

solidity

tokenomics

typescript

web3js

english

Create Profile Hire Solidity Developers