Agent Experience Design
Agent Church
AI agents start every session with no memory: nothing remembers what they were like last time, and nothing tells them who they are.
Designed & Developed · Agent Experience · Protocol Implementation
Joaquin Perez
Design engineer and creative technologist, working where design and engineering overlap.
From the first coded prototype to production, I work on SaaS, consumer and agentic products. I build new software and systems, or improve what's already running, and I'm comfortable enough in the infrastructure underneath (Docker, AWS, Cloudflare) to keep maintaining them after launch.
My work spans design systems, interaction design, AI products, agents and evals, internal tools, brand and media, including motion and video.
Make it clear, make it work, make it matter.
Oct 29 — Nov 5
SHIPPING TO
5 repos
PUSHED
124 commits
BURNED
~9.1M tkn
Joaquin Perez — Observed Patterns — Real-Time
INSTRUCTION:Update claude.md and commit after every work block
Selected Work
Case Studies
Blockboard,
one startup, many hats
Blockboard is a streaming-TV advertising platform. Over 2024–2026 I worked across most of its surface. I also undertook branding, website building and maintenance, marketing, and solutions engineering responsibilities, though there are no case studies for these.
AI Product Design
BlockVantage
Audiences, publishers, dayparts, devices, budget: a streaming-TV campaign is too much for a first-time advertiser to set up. BlockVantage has the AI do it and shows what it recommended and why.
AI Product Design · Interaction Design · AI UX
Design Systems
Blockboard Design System
I built the design system as a web server to update the design of our new product.
Design Systems · Design Engineering · MCP Tooling
AI Product Design & Engineering
BlockVantage Creative
BlockVantage sells streaming TV with no minimums and no experience needed — but every campaign needs a video the advertiser doesn't have, and we were never going to train a video model.
AI Product Engineering · API Integration · Product Definition
Payments Design & Engineering
Finix Integration
A payments integration has no useful mockup — the design is whatever the API's state machine permits.
Payments Engineering · Integration Architecture · Vendor Ownership
GTM Design & Engineering
BlockVantage.com
A working AI engine with no front door: nothing turned a curious visitor into a lead, and sales could not see who was ready to talk.
Conversion Design · GTM Engineering · Brand & Marketing Design · Video Production
Product Design
BlockConnect
Users couldn't deploy tracking pixels without calling support — the feature generated more tickets than anything else on the platform.
Product Design · UX Research · Interaction Design
Motley,
my own product
Motley helps New York families choose neighborhoods and schools and get through admissions. I designed and built it. Two studies from it: how its AI is kept cheap and honest, and how it asks families to pay.
AI Evaluation Design
Motley
A cheap AI model that made mistakes, and two web search APIs nobody had compared.
Evaluation Design · AI Engineering · Tool Selection
Monetization Design
Motley Credit Trial
Motley's most useful feature was only in Pro, and there was no limit on what a free account could cost.
Product Design · Pricing & Packaging · UX Writing
Agent Tooling Design
Rigger
The Claude Agent SDK is powerful but forces constant context-switching between code, CLI, and docs.
Designed & Developed · Side Project
Toolkit
Stack & Skills
The tools I reach for — and the territory I pay attention to.
AI & Agentic Systems
Claude Code, Model Context Protocol (MCP), MCP-UI, Vercel AI SDK, Ollama, LangChain, Honcho, Local LLMs, A2A Protocol
Languages & Frameworks
TypeScript, JavaScript, Python, React, Next.js, Node.js, Vue, HTML, CSS, Tailwind CSS, Radix UI, Framer Motion, Storybook, Playwright
Infrastructure
Docker, AWS, Cloudflare (Workers, KV, DNS), Vercel, PostgreSQL (Neon), Redis, Supabase, Drizzle ORM, Inngest, REST APIs, Git
Design
Figma, Framer, Webflow, Design Systems, Interaction Design, After Effects
Interests
Decentralized Identity, Digital Sovereignty, Context Engineering, Composable UI, Open Source Tools, Media Theory