Utrecht, NL
Lucas Lima Fonseca
Software architect from Rio Grande do Sul, Brazil.
Living in Utrecht, the Netherlands. 15 years in software.
In my spare time I build AI-native products and the agents behind them.
Now: Domain Architect at Nationale-Nederlanden, supporting 6 teams in the Claims domain.
About
I like to build things from scratch and take them all the way to production. Give me a problem to solve and a real challenge, and I am happy to stay.
Coffee is a big part of my day. I have a Gaggia Classic at home and I practice latte art every morning, slowly getting better. Flat whites are my go-to, and I love funky, fruity coffees. If there is a roaster I have not tried yet, I want to try it.
My head is always busy with new ideas and things to learn. Right now that is AI, in depth: RAG, agent harnesses, and small projects that help me and maybe other people digging into the same topics.
Anything worth reading that I find on Twitter, articles, long posts or papers ends up on my reMarkable. I built tweet2remarkable for exactly that.
Live products
- Chef Hugo ↗Turns recipe videos into structured recipes, then adapts them through an in-app agent that knows your cookbook and your diet.
- Expo
- Supabase
- eve
- Vercel AI SDK
- co-built
- launched May 2026
- 200+ users
- Cápsula ↗A disposable camera for events that lives in the browser - guests shoot, and the photos stay sealed until a scheduled reveal.
- Next.js
- Supabase
- AWS
- launched Aug 2026
- 62 events in two months
- Zili ↗Business email on your own domain, built for AI agents - a remote MCP server lets Claude and ChatGPT read, triage and draft, with your approval before anything is sent.
- Cloudflare Workers
- mailcow
- MCP
- co-built
- production beta
Lab
- llm-repo-wiki ↗A wiki that writes and maintains itself from your GitHub repos, with line-level citations.
- Next.js
- AI SDK
- Postgres
- pgvector
- runs locally
- tweet2remarkable ↗Share a post from X, a link or a PDF on Telegram and it lands on my reMarkable.
- Node
- Telegram
- live on Northflank
- skills ↗The agent skills I use every day, open for anyone.
- Markdown
- Claude Code
- used daily
Earlier work
- First Onsite ↗Property restoration across the US and Canada. I started the new platform's backend in 2021 and ran its architecture from day one on a 4-engineer backend team, alongside the web and mobile teams - including the integration layer that kept it in sync with NetSuite and Salesforce.
- Node.js
- TypeScript
- Apollo GraphQL
- PostgreSQL
- Docker
- via Clevertech
- 2021-2022
- 50+ branches
- $10M+ revenue processed
- Zing DataJoined the early engineering team two months after the idea and helped take the mobile-first BI product from prototype to the MVP that convinced the founders to go full-time.
- Node.js
- MongoDB
- React
- Flutter
- 2021-2022
- $2.4M seed
- 8,000+ users
- in the news ↗
- NofaroPet health plans. My studio built the entire technology stack from zero - the customer platform, the clinic-facing systems, the integrations and the website.
- built at Dowhile
- ~25,000 covered pets
- acquired by Petlove in 2022
- in the news ↗