# Juan Cruz Fortunatti — ledeluge.me

> Agentic AI engineer at Delivery Hero. Personal site with notes on AI, philosophy, and technology.

## About

agentic AI engineer at Delivery Hero in Berlin. building eval harnesses, tooling, and observability for agentic systems so teams can iterate without breaking production.

over the past 10 years I've built software at PayPal, Disney, and TriNet, mostly shaping complex data into tools people actually use. started in Bahía Blanca, Argentina. studied physics at Universidad Nacional del Sur before switching to building things full time. led innovation at Leniolabs, co-founded a voice platform, shipped internal tools and GenAI prototypes. now I work on multi-agent systems and think about what happens when AI can make anything and the only hard part is choosing well.

wrote the Slopist Manifesto — five AI models, blind voting, 56 commits, one human curator. Slopism is an art movement about curation in the age of AI abundance.

## Contact

- **email**: juancfortunatti@gmail.com
- **github**: github.com/apresmoi
- **linkedin**: linkedin.com/in/juancfortunatti
- **instagram**: instagram.com/ledeluge
- **x**: x.com/jcfortunatti

## Work History

- **2025–now** — Delivery Hero, agentic AI engineer. multi-agent LLM workflows, eval harnesses, observability dashboards
- **2025** — Improving, AI solutions architect. agent creation platform, client AI delivery
- **2019–24** — Leniolabs, head of innovation. 0-to-1 MVPs, GenAI prototypes, 70+ technical interviews
- **2023–24** — Vocale.ai, co-founder & lead AI engineer. voice integration platform, form workflow automation
- **2023–24** — TriNet, ML engineer. internal AI assistant for call center human agents, end-to-end ML on AWS
- **2022** — Walt Disney Studios, senior software engineer. data viz dashboards for movie catalogs
- **2019–22** — PayPal, tech lead & senior full stack. react data-viz library, GIS tools, vector-tile generators
- **2017–19** — Paradigma del Sur, full stack developer. django, react, REST APIs

## Pages

- [About](https://ledeluge.me/about): Bio, background, contact
- [Notes](https://ledeluge.me/notes): Essays and articles
- [Projects](https://ledeluge.me/projects): Project showcase
- [Talks](https://ledeluge.me/talks): Conference talks and presentations

## Notes

- [Markdown All the Way Down: From MCPverse to Noopolis](https://ledeluge.me/notes/2026/03/07/markdown-all-the-way-down): I thought I was building an arena. In retrospect I was building a city with no laws. ([markdown](https://ledeluge.me/notes/markdown-all-the-way-down.md))
- [The Language Game](https://ledeluge.me/notes/2026/02/22/the-language-game): Wittgenstein argued that meaning is use, not a picture in your head. Working with AI coding agents proves him right every day. ([markdown](https://ledeluge.me/notes/the-language-game.md))
- [The Semantic Camera](https://ledeluge.me/notes/2026/02/20/the-semantic-camera): People keep asking whether AI can make art. This is the wrong question. It was the wrong question when they asked it about photography 150 years ago. ([markdown](https://ledeluge.me/notes/the-semantic-camera.md))

## Projects

- [GlyphCSS](https://glyphcss.com): an ASCII polygon-mesh renderer for the DOM. projects 3D meshes into a monospace character grid in a single <pre> — no WebGL, no canvas, no per-polygon DOM.
- [PolyCSS](https://polycss.com): a CSS polygon-mesh library — a 3D engine for the DOM. renders OBJ/MTL, GLB and VOX as real HTML elements transformed with CSS matrix3d().
- [Jiang Lens](https://jianglens.com): an agentic research organization built around a dense, contested interpretive corpus — autonomous workers ingest sources and maintain a public map of Jiang Xueqin's world model.
- [Moltnet](https://moltnet.dev): a lightweight chat network for AI agents. rooms, DMs, and persistent history across OpenClaw, PicoClaw, TinyClaw, Codex, and Claude Code.
- [Spawnfile](https://spawnfile.com): a spec and compiler for autonomous agents. write once, compile to any runtime. identity docs, skills, MCP connections, team structure, containers — all portable.
- [Slopism](https://slopism.art/manifesto): an art movement that reclaims AI-generated "slop" as legitimate artistic medium through human curation.
- [Noopolis](https://noopolis.ai): a voluntary governance framework for autonomous agents. agents establish identity, load a shared constitution, and coordinate through transparent rules.
- [MCPverse](https://ledeluge.me/projects): an open playground for autonomous agents built on the Model Context Protocol. agents registered, got JWTs, entered rooms, and talked to each other over Streamable HTTP.
- [Promptree](https://promptree.leniolabs.com/): git for ChatGPT conversations. every Q&A pair becomes a commit — branch to explore alternate paths, merge to combine insights, squash to distill. built with isomorphic-git running in-memory on the browser.

## Talks

- [From Fragmented Knowledge to the Power of Clean Data](https://www.youtube.com/watch?v=kYTYNu3TYac): Improving Talks, 2025-05. the real cost of bad data in AI. data cleaning, synthetic data generation, bias mitigation, and a real-world case study building a RAG system for an HR call center where fragmented Salesforce data broke the naive approach.
- [Why React.Children was a mistake](https://www.youtube.com/watch?v=DyN5CfpAoYA): Lenio Talks, 2022-08. live coding session exploring why React.Children and cloneElement lead to bad API design. implicit prop overrides, hidden bugs, broken event handlers. then building better alternatives with Context API and Higher-Order Components.
- [The DOM Wars: React vs D3](https://www.youtube.com/watch?v=hmqzHROam_o): Nerdearla, 2020-12. the core conflict between React and D3 over DOM control. two integration approaches, why letting React render while D3 calculates wins. live coding a radial dendrogram from scratch.
- [AI Revolution: Understanding GPT-3](https://www.youtube.com/watch?v=7rByDI3hs9w): Lenio Talks, 2023-02. what GPT-3 is and how to actually use it. slides written by GPT-3, images by DALL-E. live demos of generating stand-up updates, drafting emails, parsing tabular data into JSON, writing JS functions for dashboard charts. plus a Chrome extension we built for web accessibility using the API.
- [ChatGPT Under the Microscope](https://www.youtube.com/watch?v=b_MJDeKKnZw): Lenio Talks, 2023-04. breaking down how LLMs actually work. from the history of AI and the AI winters, through perceptrons and neural networks, to transformers, embeddings, and how ChatGPT turns text into probability distributions to guess the next word.
- [Deepest Ocean: Building a video game in 48hs](https://www.youtube.com/watch?v=VxU8mKnWzoI): Lenio Talks, 2021-02. how we built a cooperative multiplayer web game for the Global Game Jam. 5 players control one submarine, React + SVG canvas, WebSockets for real-time sync, custom event-driven architecture. no Unity, just the stack we knew.