Senior software developer · São Paulo, Brazil · since 2004
I am Rodrigo Carrapeta. For over 20 years I have been making systems from different eras coexist and evolve: from VB3 to Spring Boot, from Access to PostgreSQL, from the ERP to a React SPA.
Free tools: Brazilian IDs, exchange rates, images and DockerEveryday utilities, no sign-up and no ads. Almost everything runs in your browser: what you type never leaves your computer.
Case studies: the context, the constraint, the decision and the outcome.
A public-utility site: live conditions on the mountain highways, ferries and tolls between São Paulo and the coast, from official sources. Stale data never vanishes: it shows faded, with the time it was collected.
Spring Boot · React · Redis · PostgreSQL · Docker
A React SPA with Spring Boot, legacy .NET support and fixes in the Protheus ERP, without stopping operations.
React · Spring Boot · C#/.NET · TOTVS ADVPL
Platforms for corporate live events during the pandemic, on event deadlines with no room to fail. PHP under pressure, then Laravel.
PHP · Laravel · MySQL
RFID installations, LED panels and role-based content for brands such as Oracle, O Boticário and Telefônica.
Flash · Processing · Meteor · MongoDB · RFID
With the team: VB3 → VB6 → C#, Access → SQL Server, and importing a competitor’s Paradox database while keeping business rules intact.
VB6 · C#/.NET · SQL Server · Delphi
Through carrapeta.dev, I work with companies on three fronts.
Moving past an old system without stopping the business: piece by piece, old and new side by side.
Screens and APIs around the ERP (Protheus included) for what it does not do well on its own.
Audit trails, data minimization and access control from the design up, not as a patch.
That is exactly my kind of system. Tell me the context; I will reply with a way forward.
I reply within 2 business days.
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