Senior Software Engineer & Tech Lead with 10+ years building backend systems, APIs and microservices (Java, Spring Boot, Python, React). I also build and sell production-ready Next.js templates under the ValandroUI brand, and write hands-on e-books for developers.
🌐 Portfolio: jeffev.github.io/jeffersonvalandro · 💼 LinkedIn · 📊 Kaggle
| Template | What it is | Demo |
|---|---|---|
| Kairo Admin | Admin dashboard, 23 screens | live |
| Kairo AI Starter | SaaS starter: auth, AI chat, credits, Stripe | live |
| Kairo Blocks | 61 landing-page blocks | live |
| Kairo Estate | Real-estate website with map and URL filters | live |
| Kairo Mail | 32 React Email templates | live |
| Kairo Studio | Agency & portfolio website | live |
All six in one bundle: Kairo Complete Kit · Store: payhip.com/ValandroUI
🆓 Free: Kairo Blocks Lite, 10 landing page blocks for shadcn/ui, MIT licensed (live demo)
- Painel Admin Profissional com Next.js 16 e shadcn/ui
- SaaS com IA do Zero: Next.js 16, Claude e Stripe
- Landing Pages que Vendem
- Site de Imobiliária com Next.js
- Portfólio que Atrai Clientes
- swing-quant: quantitative swing-trading system and a 16-year study on whether it beat investing (read the study)
- archlens-ai · ai-dev-kit · ghost-doc · Investlink