Engineering / Open resources
Products and security boundaries
Database authorization, secrets and decisions supporting a complete product.
Selected articles
- Fiz Meu Site: when a static product is better than building another SaaS
- ScriptC: native TypeScript without Electron, Node, or V8 — where it actually fits
- MCP in production in 2026: I stopped thinking about tools as functions and started thinking about boundaries
- Why I am learning Python for AI without abandoning TypeScript
- From backlog card to pull request: what I learned building a real software agent
- AI in compliance without outsourcing the decision: what I learned building a PIF SaaS for European cosmetics
- When the floor plan becomes the interface: how I built a private architecture portal around context
- How do you sell something that does not exist yet? 3D preview, approval and architecture in ImpressãoMais3D
Further resources
Modular monolith or separate services?
Choose boundaries based on operations and autonomy, with examples from ImpressãoMais3D.
Row-Level Security
Database policies limit which rows an identity can read or change.
Architecture decision record
A short document records context, choice and consequences of a technical decision.
.env key checker
Compare variable names, detect missing keys and duplicates without reproducing values in the report.
Dupla Face: a real interactive floor plan
Explore Apto Oscar's public floor plan in Estúdio Dupla Face's production product. Room pins open the actual drawings and images for each space.