HLAhub

Inspiration

So here's the thing. Organ donation is amazing — but it's also kind of messy behind the scenes. Matching the right donor to the right recipient? Yeah, not as easy as it sounds. Add in privacy, trust issues, and manual processes… and we’ve got a problem.

I asked myself — what if we could fix that using tech we already have? Like, why can't we use blockchain for transparency, AI for smart matching, and maybe even celebrate these unsung heroes online?

So yeah, HLAhub was born. It's part healthtech, part social impact, and just the right amount of “Whoa, that’s cool.”

What it does

HLAhub is a decentralized healthtech platform that:

Matches organ donors and recipients using real HLA (Human Leukocyte Antigen) data.

Uses Algorand blockchain to record matches immutably (so no funny business).

Lets users sign digital consent using wallets like Pera/MyAlgo.

Pays donors or books tests using smart contracts.

Mints NFTs of Honor for donors who change someone’s life.

And then? Posts the whole celebration on Reddit using Devvit micro-interactions. 🎉

How we built it

So here’s the tea on how I built HLAhub (yes, snacks and a lot of coffee were harmed in the making). First stop? Bolt.new — because I’m not trying to write HTML for 12 hours straight. It’s like Canva for full-stack apps, and honestly, it delivered.

But then, I got ChatGPT into the team (unpaid intern vibes, but smarter). It helped shape the concept, fix bugs I created at 3 AM, and even threw in some surprisingly good ideas. I was like: “Who needs sleep when AI’s got your back?”

For the backend, I wasn’t about to spin up my own servers — Supabase came in clutch. Auth, database, storage? Boom. All there. No tears.

Now, the blockchain bit? Oh yeah. I flirted with a few chains, but Algorand was the real one — low fees, fast transactions, and not out here boiling the planet. Perfect match.

I also plugged in MyAlgo and Pera Wallet to let users connect like pros. Log in, sign stuff, verify consent — all on-chain. Felt futuristic.

And the cherry on top? Reddit Devvit SDK. Because saving lives is cool, but shouting out your donor with a Reddit celebration post? Iconic. 🎉

So yeah, imagine Web2 and Web3 had a weekend getaway, brought AI and Reddit along, and everyone somehow built a healthtech app that could change lives. That’s HLAhub 😎

Challenges we ran into

Getting Devvit + Reddit integration to play nicely with blockchain logic (Reddit wasn’t ready for this level of tech 😅),Then Wallet authentication flows were… not super fun & Making sure health data stays private while still being transparent on-chain. NFT minting errors and transaction limits on Algorand testnet (but we fixed them! )