David is a Full-stack Developer with tech background in industry including FinTech, Education, Medical & Healthcare, E-commerce, Blockchain and Real Estate.
He focuses on Full-stack Web Development and Mobile App Development, whereas he has been usually involved in project design, architect as well as other stages of the software development process.
Gatsby.js / Next.js
NodeJs / PM2
Express.js / Koa.js
Mongodb / Redis / MySQL / PostgreSQL
Async generator flow / async / await / promises
Git / Github / BitBucket
Agile / Scrum
React / React Native / Redux
Typescript / Angular
Vue.js / Vuex
Material UI / Semantic / Bootstrap / Bulma
Dart / Flutter
Apollo / GraphQL, TypeORM
AWS Serverless programming & Architect
Python: Django / Flask
PyUnit / Jest / Mocha Unit testing
Project Management and Operation Management
Planning, Process and Change Management
Front-end Development(React, Angular, Vue.js)
Static Site Development and Server Side Rendering (Gatsby.js, Next.js )
Cross-platform App Development(Flutter/Dart, React Native)
E-commerce specialist (Shopify, WooCommerce)
CMS(Wordpress, Webflow, Drupal, Strapi, Contentful)
Web Scraping & Automation (Python Selenium, puppeteer, beautiful soup, scrapy)
Strong back-end engineering ( Python Django/Flask, Node.js, Ruby on Rails )
Database architect ( MySQL, PostgreSQL, MongoDB )
Node.js/Python development working with various blockchain daemons: Bitcoin, Ethereum, etc.
API development using Express.js, Koa.js and async/await library for readable and intuitive code.
Server management of various blockchain node types: Bitcoin, Litecoin, Ethereum, Omni, etc.
React / ReactNative / Redux, Typescript / Angular UI development of features including Chart.js, D3.js implementations of candlestick and market depth data.
Built out custom unit testing frameworks and patterns using mocha to help ensure the protection of
production/staging environment databases.
Developed entire frontend and backend modules using Django framework.
Developed views and templates with Django’s view controller and templating language to create a user-friendly website interface
Creating the automation scripts using Python framework for testing various applications as well as the integration of these applications (API’s & UI’s) based on REST calls using Selenium and Python, phrasing the JSON responses.
Designed, architected and wrote the front-end of our eCommerce application using ReactJS with 14,000 reusable components.
Achieved a Lighthouse score of 100/100 on our frontend
Researched and documented needs of 150 external partners and built an API abstraction layer for seamless integration without breaking
Modernized our legacy Vendor management app originally built on Angular 2.0 to React.js
Improved legacy front end by replacing it with ReactJS, Gatsby and Angular. Resulted into 50% faster loading times for our data heavy GIS application.
Built CI/CD pipelines using BitBucket, Docker, Kubernetes and custom scripts - helping teams deploy more than 30 times in a day
Optimized service layers, request queues and MongoDB data model to handle request load of 74,000-96,000/sec during flash sales