Joel Grayson's Portfolio

Edit Time

Desktop app that enables users to change files' date creation properties, which was previously impossible without the terminal.

Impact: 11,000 installs and $5,000 in revenue

Tech: Swift/SwiftUI, StoreKit, Bash

Buseroo

Website and mobile app for students and teachers to find which school bus leads to any address. Allows schools to sign up and manage their bus route data in admin page. Example use cases: finding a bus to doctor's appointment, aunt's house, or museum.

Impact: 2,000 searches

Tech: TypeScript, Next.js/React, Prisma, Swift/SwiftUI, GCP, OAuthTry on Web

Homework Checker

Helps students keep track of completed assignments, so they don't miss any.

Impact: 8,000 weekly users

Tech: TypeScript, OOP, Gulp, HTML/JS/SASSAdd to ChromeView code

Focus

Helps users enter the flow while writing in Google Docs.

Impact: 1,000 weekly users

Tech: TypeScript, HTML/JS/CSS, Perl, BashAdd to ChromeView code

MorseBench

Interactive Morse code trainer—key Morse with your keyboard, tap, or microphone, and hear/see it decoded in real time. Also includes encoding and practice drills.Try on Web

Venderoo

Designed & built vending machine that sold over 100 snacks. Used Arduino, 8 DC motors, LCD display, keypad, bill acceptor, wood, plexiglass, and C++.View code

Self-Driving Car

In 36 hours, turned a 2018 Honda into a partially self-driving car with team at TreeHacks (Stanford's Hackathon), winning 1st Place in the NVIDIA Track (Edge AI).View on Devpost

FPGA Piano

Wrote Verilog for an FPGA to read in raw signals coming from a PS/2 keyboard so you can play it like a piano and show text and sinusoid waveform of the note on an HDMI monitor.View code