About me
Sebastian Ronny Vilavila Hallasi.
Multiplatform application developer based in Madrid.
Profile
I develop websites and applications. I use Java and Spring Boot for the backend, and JavaScript, TypeScript and Angular for the frontend.
I have worked on Drupal interfaces at Altia and build personal and collaborative projects, from REST APIs to Android applications.
I enjoy analysing problems, testing solutions and learning independently. I also have experience coordinating changes with technical teams and communicating directly with clients.
Experience
Altia · Frontend developer · 2026
Website development with Drupal, Twig, SCSS and JavaScript. I contributed to interface improvements, accessibility reviews and content migrations.
Experience and projects ↗Education
2024–2026 · Madrid
Higher Technician in Multiplatform Application Development
IES Clara del Rey. Qualification completed in 2026.
Java, Spring Boot, Angular, databases, Android and multiplatform development. Final project: a multiplayer game with Unity and C#.
2023–2024 · Madrid
Training in Executive Assistance
IES Parque Aluche.
Communication, customer service, office software, legal administration, accounting and professional English.
Peru
Mechanical Engineering studies
Universidad Tecnológica del Perú. Two years attended; degree not completed.
Mathematics, calculus, AutoCAD, chemistry and statistics.
Technologies
- Programming languages
- Java, JavaScript, TypeScript, Python, C#, Kotlin, C++ and SQL.
- Frameworks and environments
- Spring Boot, Angular, Node.js, Drupal, Android and Unity.
- Web development
- REST APIs, HTML, CSS, SCSS and Twig.
- Databases
- Oracle Database, PostgreSQL and MariaDB/MySQL.
- Tools
- Git, GitHub, Linux, Android Studio, Maven, Gradle, Docker, Vercel and Trello.
- Teamwork
- Agile teams, task organisation and tracking with Trello, requirements analysis and coordination with developers and clients.
Certificates
Courses completed on OpenWebinars in 2025.
Enlarge ↗Administración de BBDD con MySQL: Sentencias DDL y DML
OpenWebinars
Enlarge ↗Curso Certificación Cisco CCNA 200-301 Parte 1.1: Prácticas de Fundamentos de redes
OpenWebinars
Enlarge ↗Curso de C# intermedio
OpenWebinars
Enlarge ↗Curso de C# para principiantes
OpenWebinars
Enlarge ↗Curso de Clean Code
OpenWebinars
Enlarge ↗Curso de creación y administración de Bases de Datos SQL
OpenWebinars
Enlarge ↗Curso de fundamentos de PL/SQL
OpenWebinars
Enlarge ↗Curso de Git
OpenWebinars
Enlarge ↗Curso de introducción a C++
OpenWebinars
Enlarge ↗Curso de Java XML
OpenWebinars
Enlarge ↗Curso de Programación orientada a objetos con C++
OpenWebinars
Enlarge ↗JavaScript Fundamentals
OpenWebinars
Enlarge ↗Introducción a la administración de BBDD con MySQL
OpenWebinars
Enlarge ↗LPIC-1 Versión 5.0 Examen 102 Tema 110: Seguridad
OpenWebinars
Enlarge ↗WordPress: Construcción de sitios web
OpenWebinars
Languages
- Spanish · native.
- English · B2.
Contact
You can email me or visit my professional profiles.
Get in touch ↗