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The journal

Notes from the build.

Essays and field notes on Lumora Sleep, The Uplift Project, SEVORA, AI experiments, and building things at 16 in San Antonio.

Rehan Raj pitching Lumora Sleep to Geekdom's CEO, mentors and entrepreneurs in San Antonio
FEATURED · JUL 1, 2026 · ABOUT · 4 MIN Who is Rehan Raj? The full story: a 16-year-old founder building Lumora Sleep and SEVORA, a Smithsonian-featured designer, and the lead of a $15,931 campaign against blood cancer. READ →
TOP READ · JUL 2, 2026 · UPLIFT · 3 MIN Six months of silence How The Uplift Project got on San Antonio's biggest news station: two pitch emails a week, months of nothing, and one six-word reply. READ → JUL 1, 2026 · LIFE · 2 MIN 1,433 days of Duolingo I haven't missed a day of Spanish practice in almost four years. Here's what a streak proves, and what it doesn't. READ → JUN 28, 2026 · AI · 2 MIN I built my own JARVIS I grew up on Iron Man, so I built a JARVIS that briefs me every morning and once stopped me from pushing credentials to a repo. READ → JUN 24, 2026 · LUMORA · 2 MIN The quiet months at Lumora After months of quiet building at Lumora, the first prototype is in the mail and the waitlist is open. READ → JUN 15, 2026 · AI · 2 MIN What I built at Fired Fest I spent two days at Gauntlet AI's Fired Fest building a harness that stops an AI from inventing discounts for Lumora Sleep. READ → JUN 5, 2026 · SEVORA · 2 MIN Offline is the spec Why we built SEVORA, a $49 grain sensor, to work with no internet, no smartphone, and no subscription. READ → MAY 30, 2026 · IMPACT · 2 MIN Logistics are the love language I do outreach for the Best Day Ever Foundation, which means a lot of phone calls and a lot of people saying no. READ → MAY 22, 2026 · ESSAY · 2 MIN Sleep is an engineering problem I picked sleep because it's a problem everyone has and nobody respects, and because the inputs that decide it are all controllable. READ → MAY 8, 2026 · DESIGN · 2 MIN The river is mostly scenery My floating pod design for the San Antonio River Walk was recognized by Cooper Hewitt's national high school design competition. READ → APR 18, 2026 · ESSAY · 3 MIN The pitch got shorter every time One win, one loss, and why the same pitch kept getting shorter every time I gave it. READ → APR 3, 2026 · ROAD · 2 MIN A few days in Austin I spent a few days in Austin during SXSW, usually as the youngest person in the room, and mostly I listened. READ → MAR 28, 2026 · ESSAY · 2 MIN What raising $15,931 actually took Most asks got ignored, and the flashiest thing we did was answer phones on live TV, so here's what actually raised the $15,931. READ → MAR 20, 2026 · UPLIFT · 2 MIN The final number is $15,931 The Uplift Project closed at $15,931 for families facing blood cancer. Here's what a team of high schoolers in San Antonio actually did. READ → FEB 17, 2026 · UPLIFT · 2 MIN The studio is colder than it looks I went live on Good Morning San Antonio to talk about The Uplift Project, and learned that live TV gives you exactly one take. READ → FEB 2, 2026 · ESSAY · 2 MIN Courses gave me vocabulary, shipping gave me judgment I've done the Harvard coursework and shipped rough projects to strangers since I was 12, and one of those taught me much faster. READ → JAN 25, 2026 · ESSAY · 2 MIN A city that says yes Nobody in San Antonio told me to come back when I'm older, and for a first company that kind of yes beats a bigger city's money. READ → JAN 16, 2026 · UPLIFT · 2 MIN It started with Miguel The Uplift Project launched January 16, and it exists because of my friend Miguel, who beat leukemia. READ → DEC 18, 2025 · UPLIFT · 2 MIN I stopped waiting until I'm older A friend from school beat leukemia, and watching what his family went through is why The Uplift Project launches January 16. READ → NOV 14, 2025 · LUMORA · 2 MIN The first time strangers said yes Our first public pitch for Lumora won first place at Geekdom's Pitch It To Win It, and 40,000 strangers watched the video. READ →
Rehan Raj · San Antonio, TX
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