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Art
Castillo.
Front-End Developer · UI/UX Designer · Brand Identity · Novelist
Expertise
Front-End Dev
UI/UX Design
Brand Identity
Stack
Next.js · TypeScript
Tailwind · Supabase
AI Integration
Currently
Writing a novel.
Building in public.
Open to work.
Selected Work
01
Novel1st AI
Full novel writing studio with AI chapter generation, character builder, world builder, and writing analytics. Multi-provider — OpenAI, Claude, Gemini.
Next.jsAITiptap
→02
Synapse
Notion-alternative note-taking/second brain app with AI assistant, semantic search, drag-and-drop organization, and freemium Stripe integration. Your second brain. Minimal. Fast. Yours.
Next.jsAIPostgres
→03
Corex
Collaborative canvas built for engineering teams. Markdown editor, real-time canvas, and diagram-as-code. Optimized Eraser clone.
Next.jsCanvasReal-time
→04
Gwen UI
Open source ChatGPT UI clone. Bring your own OpenAI API key and use this clean, fast interface. 100% unaffiliated with OpenAI.
Open SourceOpenAIReact
→Design Work
Visual
Identity.
Brand identity, UI design, apparel, and art direction. Every mark built with intent.
Let's Talk