Eric Peterson

A progressive web app for shuttle van riders to buy passes and catch a ride to local breweries. This app includes a full SaaS platform for managers of a shuttle van or bus to sell tours, edit routes, and manage drivers.

I was the sole developer and wrote the rider UI (installable as an app), as well as the manager portal, payment processing integration, QR code passes emailed to riders, and driver app to scan QR passes and provide real-time bus location.

The link shows the rider app with a real-time shuttle location and a link to buy tickets. The UI is very simple and if I had more time to spend on it, it would have been even simpler.

This is a data/map visualization project to view all US traffic fatalities (since 2001) using public data. I used a Jamstack architecture so this does not need a back end. The data is compiled by the US government and pre-processed by me into static files loaded by the UI.

ABAP Logger is a library I open-sourced back when I was doing enterprise application development on SAP's platform. It's now the third most-starred ABAP project on GitHub.

An interactive pop-cryptography app that allows a user to encode and decode a short message into and from a deck of cards.

Technologies: D3.js, Webpack, HTML, Sass, Jest (for unit testing), originally CircleCI for continuous integration and deployment to GitHub Pages, now Netlify for CI and hosting.

The code is available at GitHub.com/epeterson320/codeck.

A small web application that was written in React to solve a triangle based on incomplete data and display the shape of the triangle to the user.

Technologies I used: React, Webpack, Redux, Sass, Jest (for unit testing) originally CircleCI for continuous integration and deployment, now Netlify for CI and hosting.

The code is available at GitHub.com/epeterson320/triangle-calculator.

This project serves as an excellent, concise illustration of defining a library class in JavaScript, codeck.js. The encoding and decoding processes are compartmentalized into different files, while the user interface code is housed in separate, dedicated data. A singular, compact class facilitates the interaction between these two components. This class delineates the internal contract between them, streamlining their interaction.

A representative sample of my work that exemplifies the public interface's definition for encoding and decoding text strings to and from a permutation of an ordered set, represented as an array, is available in the GitHub link mentioned above.

Deliberately not much to look at, I wanted to try out a CI workflow for Android, where as soon as I push code to source control, it's automatically tested against a suite of unit and integration tests.

I wanted to do this with a small app since for this project I was more concerned with process than results. The app itself is what I ended up naming "the simplest possible flashlight."

These are a family of Android apps that help doctors and hospitals make good decisions at the point of care. They're content-heavy and contain interactive features and tools that aren't possible in an eBook format.

Work done:
• Rolled all of the apps into one codebase with shared core features.
• Corrected concurrency errors, bringing app launch from three seconds to 0.2 seconds.
• Optimized a slow SQLite, full-text search query to be blazing fast.
• Added additional features requested by customers.