Hi, entrepreneurs,

JanessaTech(Juan Zhao in Chinese name) is a Senior Full-Stack Engineer with 10+ years of experience at IBM & Huawei etc and a Master degree in CS from Xi'an Jiaotong University. Specializing in Web3 & DeFi for the past three years, she has deep expertise in building decentralized applications from 0→1 — from smart contract integration to frontend optimization.

Uniswap V3 DEX (Core Project): Independently integrated Swap, Liquidity Management, and Fee Collection. Designed a backend data middleware layer using The Graph polling + WebSocket push to solve frontend real-time data bottlenecks. Deployed and running stably on testnet.

• Youtube: https://www.youtube.com/watch?v=gzZp0TNLECo
• Demo: https://app.bestdex-by-janessatech.com/
• Github: https://github.com/JanessaTech/BestDex

NFT Marketplace: Full-stack development covering NFT display, listing, purchase, and on-chain transfer (~30k lines of code). Deep understanding of ERC721/1155 standards and trading logic.

• Intro: https://www.youtube.com/watch?v=UCe7ilfKP8o
• Front-end: https://github.com/JanessaTech/best-second-hand-market
• Backend: https://github.com/JanessaTech/best-second-hand-market-backend

• Backend Distributed Systems at IBM, Huawei (cloud computing platforms, anomaly detection)
• Microservice & DevOps & Remote Collaboration at Alstela: built CI/CD from scratch (AWS/Docker/GitHub Actions), Cloudflare Zero Trust integration
• Full-Stack Development at ZTE, Alstela as an independent developer

Blockchain/Web3: AMM · Uniswap V3 · ERC20/721/1155 · Smart Contract Security . SIWE(Sign-In with Ethereum) . Solidity . Hardhat · The Graph · Wagmi · Viem . Foundry · Tenderly
Backend/Distributed Systems:Node.js · Express · MongoDB · MySQL · RESTful API · WebSocket · Redis · RabbitMQ · Microservices Architecture · Distributed System Design
Frontend: Next.js · TypeScript · React(Hooks) · Tailwind CSS · Shadcn · RainbowKit · Ethers.js
Database: MongoDB, MySQL, Schema Design, Query Optimization DevOps Tools & CI/CD: Git · Docker · AWS(EC2, IAM,RDS) · GitLab · GitHub Actions · Linux Shell
Testing &Others: Integration testing · Unit testing(Mocha, chai) · Agile · Jira

• Gmail : [email protected]
• Team id: [email protected]
• Linkedin: https://www.linkedin.com/in/janessatech/
• Medium: https://medium.com/@JanessaTech