Chad
Lengefeld

Hi I'm Chad, a Full Stack Developer and Geographer. I have a B.A. in Environmental Science (Water Resource) and a background in GIS. I work with responsive UI/UX, JS, React, Solidity, Web3, Ruby, and a variety of other technologies and languages. I'm currently focused on smart contract, Web3, and Full Stack Development.

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Coding Projects

Web3 Crypto App


A React App utilizing Web3, Metamask, Solidity to connect smart contract data to UI. Deployed on the Ropsten Testnet.

Stack
  • React
  • TailwindCSS
  • Hardhat
  • Web3
  • Metamask

Confluence Exchange and Token (FLOW)


In depth blockchain project. Writing / testing Solidity smart contracts with Ganache / Truffle. Interacting with Metamask / UI / Redux, deployed on Ropsten Testnet.

Stack
  • React
  • Web3
  • Redux
  • Solidity

Be Like Water NFT Drop


Utilizing a Bruce Lee painting I did, generated a 25 NFT collection, deployed on Rinkeby

Stack
  • NFT
  • Web3
  • Javascript

FreeCodeCamp Data Visualization Project


Project learning to use d3.js to arrange data graphically, with a mouseOver tool that displays data for the relative pointer location on the bar chart.

Stack
  • Javascript
  • D3.js
  • CSS

Random Quote Machine


A FreeCodeCamp project using jQuery, Ajax calls, to provide inspirational quotes from famous people via a button, with a built in redirect to tweet the quote.

Stack
  • Javascript
  • jQuery
  • CSS
  • Ajax

HTML5 Audio Player


Browser based Audio player with a playlist.

Stack
  • HTML5
  • Node
  • jQuery

DNA Count App


Python App using Streamlit, deployed to Heroku

Stack
  • Python
  • Streamlit
  • Heroku

Navigation App


Navigation App built using XCode, Swift, Mapbox SDK.

Stack
  • XCode
  • Swift
  • Mapbox SDK

CAFO Drought Project


Capstone Water Resource Project. Analysis of the top Concentrated Animal Feed Operations (CAFO's) in TX, with the most recent drought period index overlaid. Within the work I address the concept of 'Virtual Water Movement' via the Trans-Pacific Partnership (TPP).

Stack
  • GIS
  • Spatial Analysis
  • SQL
  • Python

Global Natural Hazards App


Built on Codepen with JS, MapboxGL, and utilizing API calls for JSON / GeoJSON data. Added a CSS zooming feature. The App displays the top 11 hazards at the current time.

Stack
  • Javascript
  • CodePen
  • MapboxGL
  • API

Crypto Ticker


Cryptocurrency price app that I built using Axios to make API calls. Data was sourced from Cryptocompare.com.

Stack
  • React
  • JavaScript
  • NPM
  • Axios
  • API

Geomorphology of Bryce Canyon


Capstone project defining the geomorphology of Bryce Canyon, located in the Colorado Plateau in Utah

Stack
  • GIS
  • Remote Sensing
  • Water Resource

FCC Survey Form


FreeCodeCamp project involving forms and various inputs, utilizing HTML5 validation checks.

Stack
  • Codepen
  • HTML5
  • CSS

FCC Technical Doc


FreeCodeCamp project building a basic technical documentation for Aquaponic Gardening. A simple build learning to integrate a Nav bar.

Stack
  • Codepen
  • HTML5
  • CSS

Personal Finance App


Ruby App using sessions for login and some simple math to extrapolate future expenses.

Stack
  • Ruby
  • Sinatra

Enchanted Rock Viewer


GIS Map Viewer built in Codepen, using Mapbox API and utilizing GeoJSON data.

Stack
  • Codepen
  • API
  • Mapbox

Skybox Scenes


Working with Skybox in 3js. Created revolving viewpoint that can zoom in or out, and start or stop auto rotation of the image.

Stack
  • HTML
  • CSS

Fibonacci Spiral


Utilizing compass CSS3 and keyframes.

Stack
  • Haml
  • SCSS
  • compass CSS3

Nintendo Animation


A Mario animation utilizing keyframes, layering, and timing.

Stack
  • HTML
  • CSS3

JQuery Animations


Experimenting with various Jquery animations and effects.

Stack
  • Javascript
  • jQuery
  • CSS

Sunset Animation


Experimenting with mixins and keyframes to create this visualization.

Stack
  • Javascript
  • mixins
  • keyframes
  • CSS

Javascript Animation / Rendering


Experimenting with mixins, keyframes, terrain rendering visualization and animation timing to create this project.

Stack
  • Javascript
  • CSS
  • mixins
  • keyframes

Videos

  • Ruby Finance App


  • Natural Hazards API

Technologies

  • Front-End and Languages

    Experience with Javascript / React.js / Next.js / Ruby / Ruby on Rails / Sinatra / Angular.js / d3.js / API

  • UI/UX

    HTML5 / CSS3 / Animations and Transitions / Blender / Adobe Illustrator

  • Back-End

    Experience with Node.js / Ruby on Rails / Docker / SQLite3 / MySQL / Python / Relational Database / Metadata

  • Blockchain and Equities

    MetaMask and Web3 / Solidity / Ganache / Truffle / HardhatJS / Remix(Ethereum IDE)


    Currently experimenting with ChainLINK, Ethereum, Polygon(matic), XYO smart contracts / API's, with interests in several other projects as well. Experience testing in locally, Kovan, Ropstein, Mumbai(Polygon) networks. Experienced investor/trader in U.S Equities and Cryptocurrency.

  • Geographic Information Systems (GIS)

    OpenMaps / ARCGis / Proprietary Mapping Systems (AppleMaps) / GeoJSON


    Academically trained as a Geographer (Water Resource) with a minor in Geology and certification in GIS. I have a high level understanding of mapping, metadata and databases. Experience with SQL and Python as well as UI/UX principles, project architecture, story creation.

  • Hardware

    I have built and programmed various cryptocurrency mining rigs from the ground up, utilizing Python as well as writing batch scripts for miners. I have also worked with Raspberry Pi controllers.

About Me

Personal Accomplishments

B.A in Water Resource with a minor in Geology

Multiple GIS Certifications, Remote Sensing

A.A. Liberal Arts

LEED's Green Associate

Responsive Web Design Certification

First Aid Certification

15+

Open Source Projects