Sergio聽Ballestero
Freelance
Asuncion, Distrito Capital de Paraguay
Summary
馃懁
Senior馃帗
Top SchoolSergio Ballestero is a pragmatic freelance software engineer with over 13 years of professional experience and 18+ years involved in web development, specializing in frontend engineering with strong full-stack capabilities. Based in Asunci贸n, Paraguay, he has built scalable, high-throughput systems鈥攆rom a GPS tracking platform processing millions of messages to cloud-native React/Electron business communications apps鈥攗sing React, TypeScript, Laravel/PHP, Node.js and React Native. He combines hands-on feature delivery with operations experience (GitLab/GitHub CI/CD, cron jobs, UDP servers for GPS hardware and Firebase push notifications) and a history of mentoring and improving team workflows. Sergio is comfortable shipping cross-platform products, refactoring legacy code into modern, testable components, and integrating complex backend APIs and auth flows. His portfolio spans US and regional clients including university management systems and mission-critical fleet tracking, reflecting an ability to translate demanding real-world requirements into resilient, user-centric applications. An unusual strength is his blend of UI design background and low-level server integration experience, enabling end-to-end ownership from pixel to production.
13 years of coding experience
18 years of employment as a software developer
Universidad Americana ParaguayComputer Science Information Technology, Computer Science Information Technology at Universidad de PalermoDise帽o Gr谩fico Ingles, Dise帽o Gr谩fico Ingles at Universidad Americana
English, Spanish
Stackoverflow
90reputation
10kreached
6answers
7questions
Github Skills (21)
composer8
php7
html6
iframe6
package-manager6
dart6
react-router-v46
directive6
flutter6
react6
ionic-framework6
android6
htaccess6
dependency-manager6
cordova6
Programming languages (4)
Github contributions (5)
lickybuay/MoodCss
Jul 2012 - Sep 2013
Contributions:4 commits in 1 year 1 month
lickybuay/lickybuay
Oct 2021 - Apr 2024
Contributions:1 push in 2 years 6 months
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