Jhonnatan Da Costa Vieira
Senior Application Security Engineer Secure Development Advocate At NewFold
Mato Grosso do Sul, Brazil
Summary
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Senior🎓
Top SchoolJhonnatan Da Costa Vieira is a Senior Application Security Engineer and Secure Development Advocate with eight years of experience building secure, production-ready software across Latin America. He has led DevSecOps initiatives—introducing Security Champions, integrating SAST/DAST into CI/CD, deploying Keycloak for modern IAM, and rolling out secret vaults—to shift application security left and empower developer teams. Prior roles blend hands-on full-stack and backend development (Java, Spring Boot, Angular) with red-team remediation and performance-focused patching, giving him a practical perspective on risk and reliability. Based in Mato Grosso do Sul, Brazil, he pairs formal training in systems analysis and physics with a knack for translating security controls into developer-friendly workflows. Notably, he has moved beyond advisory work to implement the tools and pipelines that make secure practices repeatable at scale.
8 years of coding experience
6 years of employment as a software developer
Bacharelado Análise de Sistemas de Computação, Bacharelado Análise de Sistemas de Computação at Universidade Federal de Mato Grosso do Sul
Github Skills (19)
google-maps-api10
leaflet9
arcgis9
wkt9
polygon8
geospatial8
geometry8
android5
windows5
ios5
react-native4
macos4
flutter3
firebase3
authentication3
Programming languages (3)
Github contributions (5)
mrgr4v3s/firebase-auth
Sep 2019 - Apr 2020
Angular 8 authentication project using Firebase Auth
Contributions:12 commits, 10 PRs, 19 pushes in 6 months
angularauthauthenticationfirebase
mrgr4v3s/estoque-bebida
Dec 2018 - Sep 2025
Contributions:8 pushes, 1 branch in 6 years 10 months
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