Joan Comadran

Joan Comadran · Barcelona

I build AI systems and the products that ship them

AI engineer and full stack developer. LLM-powered products and agents, end-to-end web systems, and paid acquisition with proper tracking.

See the workRead the blog

About me

One week I’m shipping an agent, the next I’m color-grading a film.

I build AI-powered products and agents, ship end-to-end web systems, run Google and Meta campaigns with proper tracking, and occasionally make AI films that screen in actual cinemas. Sometimes all in the same week.Open to collaborating on AI engineering, full stack work, paid acquisition, automation, or anything that’s genuinely interesting to build.

Skills

What I work with — and where I’m headed.

Proven

Solid foundations and shipped work — what I reach for by default.

LLM APIs (OpenAI · Anthropic) · Prompt engineering · MCP (Model Context Protocol) · Python · TypeScript · React.js

Working knowledge

Comfortable building with these today, still deepening the edges.

RAG pipelines · LLM tool calling · Generative video & image pipelines · CI/CD pipelines

Learning now

Actively skilling up on the agentic stack — the direction I'm heading.

LangGraph · GraphRAG · Vector databases · Agent evals & guardrails · Graph databases · Testing (unit & E2E)

(01) Development

AI & full stack products.

(02) Marketing & Analytics

Ads, tracking, growth.

(03) Cinematography

AI films, in cinemas.

(01)(2026)
Play video

Beyond the work

Off the clock, there’s usually a camera.

I travel when I can and take photos while I’m there. Same eye I bring to the films, minus the render queue.

Latest writing

From the blog.

Engineering | July 20, 2026

Building a WhatsApp bot with Claude and the Meta Cloud API

The happy path is 20 lines. Then Meta retries your webhook, Vercel kills the function mid-reply, and your lead gets the same message twice. Here's the version that survives production.

Read article