David Kei


I'm a

About


Full stack Developer & Senior Blockchain Developer

Hello! This is David Kei, have 8+ years of experience in web and blockchain development. Experienced full stack developer with a strong background in developing award-winning applications for a diverse clientele. 8+ years of industry experience includes programming, debugging, and wireframes.

- As a full stack developer with a strong background in technologies such as React/Next, Vue/Nuxt, Node/Nest, PHP/Laravel, Python/Django, Solidity, Ethers.js, AWS/GCP, and more, I have demonstrated proficiency in building Web & Blockchain Apps that interact with backend APIs for service provisioning.
- My experience includes developing reusable components and testing them with Jest, building NPM modules, integrating socket.io, Pusher for real-time tracking on Google Maps, and working extensively with blockchain technologies such as EVM.
- I am passionate about creating efficient and scalable solutions that meet the needs of my clients while ensuring optimal user experiences.

Professional Experience

Senior Software Engineer

May 2023 - Dec 2024

goAptive

  • Developed Web app interacting with backend APIs to provide pest control service to hundreds of thousands of customers across USA.
  • Integrated socket.io to implement the real-time tracking on google map.
  • Created the custom calendar and its reputation logic, scheduling functions to provide service.
  • Integrated backend and third party APIs to implement aptive service.
  • Developed reusable component using react Storybook, test using Jest and published npm package.
  • Adjusted conflicts and document to navigate npm package to other team.
  • React Typescript webpack Storybook Jest Tailwind ES6+ Socket.io google map Okta PHP Laravel

Blockchain Full-stack Engineer

Feb 2021 - Oct 2021

Looksrare

  • Built a front-end application for minting and staking NFTs using React and Web3.js.
  • Contributed to a contract for NFT registration and redemption with Solidity.
  • Created a POC Vue.js front-end platform for an NFT gallery using Moralis and Vue.
  • Worked on the token distribution and migration from BSC to Polygon network using BscScan, PolygonScan API, and Solidity.
  • Technologies: Blockchain, Web3.js, Solidity, Ethers.js, Moralis, React, Vue.js, JavaScript

Full Stack Blockchain Engineer

Feb 2022 - Apr 2023

Admire

  • Utilized Vue.js, Nuxt.js, and Quasar frameworks to build the frontend of the NFTmarketplace.
  • Implemented the backend using Nest.js, a TypeScript-based Node.js framework.
  • Designed and developed RESTful APIs and implemented various endpoints for features like user registration, login, NFT listing, bidding, and purchasing.
  • Utilized PostgreSQL as the relational database to store NFTs, user information, transaction history, and other relevant data.
  • Connected apis and functionalities with BeaconWallet in tezos network and developed indexer to sync DB and tezos network with Python.

Node Nest PostgreSQL Vue/Pinia Nuxt Quasar AWS RESTful APIs SQL Typescript ES6+ Tezos Beacon Objkt Python Gitlab

Full Stack Blockchain Developer

Oct 2019 - Nov 2021

Looksrare

  • Built a front-end application for minting and staking NFTs using React and Web3.js.
  • Contributed to a contract for NFT registration and redemption with Solidity.
  • Created a POC Vue.js front-end platform for an NFT gallery using Moralis and Vue.
  • Worked on the token distribution and migration from BSC to Polygon network using BscScan, PolygonScan API, and Solidity.
  • Blockchain Ethereum Web3.js Solidity Ethers.js Moralis AWS React Vue.js JavaScript Typescript

Front end Developer

May 2015 - Sep 2019

Holidu

  • Integrated Redux and MobX on a number of React-based front-end projects for the better state management of React components.
  • Implemented a GraphQL-and-Apollo server for a React-and-Vue.js front-end data query.
  • Created a new customized chart library using D3.js and Plotly.js.
  • Embedded a Google tag manager and Google Analytics for the website conversion tracking and the user event tracking.

Technologies: PHP Wordpress Laravel Mysql React Vue Responsive Git Test JavaScript ES6 Material UI jQuery CSS AWS


Education & Language

National University of Laos

2011 - 2015

B.E. Software Engineering

Language

English

Japanese

Skills

HTML / CSS / SCSS 100%
JavaScript / Typescript100%
React/Vue/Angular100%
Next/Nuxt/Gatsby95%
WordPress/Shopify95%
Node.js/ASP.NET100%
Python/Ruby/PHP90%
PostgreSQL/MySQL/MongoDB95%
AWS/GCP/Azure90%
Web3.js/Ether.js95%
Solidity/Rust 100%
Hardhat/Truffle 100%
Infura/Moralis95%
Eth/BSC/Polygon/Avalanche/Solana95%

Portfolio

  • All
  • Web
  • NFT
  • Defi

Services

Web Development

Modern and mobile-ready website that will help you reach all of your marketing.

Blockchian Development

Ethereum, Binance Smart Chain, Avalanche, Polygon, DEX, Staking, Vesting.

Game Development

Developing 2D & 3D web and mobile games by using Unity3D and HTML5.

Chat Solution

XMPP based chat solution will be provided for your own chat system.

Contact



Teams:

live:.cid.abecc0e8069e6d36

Telegram:

https://t.me/codemania

Linkedin:

linkedin.com/in/david-kei-023292242/

Github:

https://github.com/goldoneen

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