João Perin
Software Engineer at InComm Payments
Rio Grande do Sul, Brazil
Summary
👤
Senior🎓
Top SchoolJoão Perin is a Fullstack Software Engineer with 9 years of experience specializing in Java backend development with Spring and a strong track record building cloud-native microservices on Google Cloud Platform. He moved from COBOL-based ERP intern work into designing REST and GraphQL-like APIs, including an API Gateway in Node/TypeScript that bridges modern services with legacy COBOL systems via WebSockets and sockets to call COBOL routines. At banks and enterprise software vendors he has delivered high-throughput batch processing, transactional microservices, and Angular/Flutter frontends, and has acted informally as a tech lead shaping architecture, CI/CD and developer onboarding. He pairs deep backend expertise (JPA/Hibernate, Spring Batch, Apache Camel, Pub/Sub, Dataflow) with hands-on frontend and mobile work, having rewritten Ionic apps into Flutter and built component libraries to empower non-web teams. Curious and pragmatic, he has built interpreter-based query layers (ANTLR + JPA Criteria) to give powerful filtering to third parties, showing a habit of turning complex legacy constraints into developer-friendly platforms. Based in Rio Grande do Sul, Brazil, he also shares code and experiments publicly on GitHub as a Java backend developer and Flutter enthusiast.
9 years of coding experience
7 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Universidade FeevaleHigh School Diploma, Industrial Electronics Technology/Technician, High School Diploma, Industrial Electronics Technology/Technician at Fundação Escola Técnica Liberato Salzano Vieira da Cunha
Portuguese, English
Github Skills (59)
windows10
android10
ios9
cross-platform9
desktop9
material-design9
flutter9
macos9
dart9
web-framework8
mobile8
mobile-development7
app-framework7
mobile-game7
fuchsia6
Programming languages (8)
Github contributions (5)
joaovperin/HandleFlutterChat
Oct 2019 - Apr 2021
HandleChat, Flutter version (just to learn)
Contributions:3 releases, 7 PRs, 25 pushes in 1 year 6 months
flutterdart
joaovperin/TribalWars
Sep 2020 - May 2022
TribalWars
Contributions:81 commits, 27 PRs, 85 pushes in 1 year 8 months
javascripttribalwars
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