Freelancer profile translated to English.

Description

Full-stack developer specializing in end-to-end enterprise web applications. On the front-end, I work with Vue 3, TypeScript, Pinia, and PrimeVue; on the back-end with Java 21 and Spring Boot on Oracle, designing clean REST APIs with attention to security and performance. I have experience in projects with mapping and geospatial data, and in modernizing legacy systems without breaking what already works.

What sets me apart: I have built and published a complete social app on the App Store entirely on my own, from the database to the interface. I don't just program isolated features; I think about the entire product: architecture, UX, deployment, and maintenance.

Available remotely for one-off or long-term projects. I respond quickly and deliver with order.

Languages

Galician
Native or bilingual
English
Conversational
Spanish
Native or bilingual

Workplace preferences

Remote only

Primarily works remotely

WØRN
IOS App - Personal Project
SOCIAL NETWORKS
March 2026 - June 2026 (3 months)
La Coruña, Spain
Social app for fashion and streetwear for iOS, developed and published on the App Store entirely by me. Client in Swift/SwiftUI; backend in Supabase (PostgreSQL, Auth, Realtime); social graph (follows, likes, feed), 24h stories, push notifications (APNs), and AI-powered garment analysis. From data architecture to the interface and deployment.
SwiftUI Xcode Supabase Apple App Store
Indra / Minstait
Developer
PUBLIC SECTOR
March 2021 - May 2026 (5 years and 2 months)
La Coruña, Spain
Development and maintenance of management systems for public administration with Java and Oracle (PL/SQL): desktop applications in Java Swing, legacy layers (JSP/jQuery), and migration to corporate Angular. Debugging complex stored procedures and maintenance of critical databases.
Java HTML5 CSS3 Angular Oracle

Be the first to recommend Sergio

Help this freelancer shine by sharing your experience working together.

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

Baptiste Duhen

Fullstack developer

4.6

(4)

Amed Hamou

Senior Lead Developer

(2)

Audrey Champion

Web developer

4.3

(3)

Signup to reveal

Graduate in Web Application Development
I.E.S. Fernando Wirtz
2022
Graduado en Desarrollo de Aplicaciones Web
Graduate in High School
I.E.S Salvador de Madariaga
2021
Graduado en Bachillerato

Check out Sergio's education

Sergio R.

Full-Stack Developer · From idea to production

About Sergio

Experience

Recommendations

These freelancer profiles also match your criteria

Education

Skill set

Categories