Things I've built for the joy of building them. For the formal stuff, there's LinkedIn.
An app for remembering first times: the first concert, the first trip, the first time you did something with someone. It sends a quiet nudge every year on the anniversary. I built the whole thing: API, iOS, Android, web. My favorite detail: friend codes that read like Hawaiian words instead of random characters.
A private memory companion for the people in your life. You log small moments as they happen: a conversation, a place, a new face. When you need to remember something about someone, you ask in plain language and it finds it. The strictest tier encrypts everything on your device. The server never sees those notes, and neither does the AI.
My curtains came with little radio remotes scattered around the house. I sniffed their signals with a CC1101 module, taught an ESP32 to speak their language, and wired everything into Home Assistant, which also puts them in Apple Home. Now the curtains follow my voice, and the remotes are mostly decoration.
A tiny health diary I built for my girlfriend: a form she filled in whenever something hurt, like knees, wrists, or head. At the exact moment she hit save, an ESP32 with a sensor at home recorded temperature, pressure and humidity, and attached them to the entry. The goal was to find out whether her pain tracked the weather, and a charts page tried to answer that. We never reached a verdict, but building it, and programming the ESP32, was the fun part anyway.