012025–26
StayYoung
AI wellness platform
An AI-driven wellness platform — owned end to end, from the member app to the on-site AI coach to the subscription platform behind it.
Next.jsReactTypeScriptSupabase
end to end.
Eldan Galperin — a full-stack product engineer who designs, builds, and ships web apps, AI products, and automations. From the first commit to production.
scroll
01
Selected work
A few products I've taken from idea to production. Fewer, deeper case studies — the work is the proof.
02
About
I'm Eldan Galperin, a full-stack product engineer. I like owning a product from the messy first idea all the way to something real people use — the data model, the API, the interface, and increasingly the AI that sits inside it.
Lately that's meant building AI-powered products: an in-app assistant on Claude, multi-tenant content pipelines, and agents that take real actions. I care about the unglamorous parts too — auth, performance, security, and making things fast on a mid-range phone.
I take on a small number of freelance and consulting engagements where I can do my best work. Let's talk →
Frontend
- React
- Next.js
- TypeScript
- Tailwind
- Framer Motion
Backend
- Node.js
- PostgreSQL
- Supabase
- Edge Functions
- REST
AI / LLM
- Anthropic Claude
- OpenAI
- Function calling
- RAG
- Prompt design
Ship
- Vercel
- CI/CD
- Performance
- Analytics
- Security / RLS
03
Let's work together
Have a product to build or an AI feature to ship? I'm open to a small number of freelance and consulting engagements.