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Hallo, ich bin

Sebastián Entrerrios García

Senior Full Stack & Mobile Developer

Based in Madrid, Spain. I build digital products with care — from native mobile apps to full-stack web systems.

Über Mich

Technologien

Werkzeuge und Technologien, die ich beherrsche

Kotlin

Kotlin

★★★★
TypeScript

TypeScript

★★★★
Jetpack Compose

Jetpack Compose

★★★★
Android

Android

★★★★
React

React

★★★★
Ktor

Ktor

★★★★
Kotlin Multiplatform

Kotlin Multiplatform

★★★★
Git

Git

★★★★
Gradle

Gradle

★★★★
MVI

MVI

★★★★
MVVM

MVVM

★★★★
Clean Architecture

Clean Architecture

★★★★
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Soft Skills

Persönliche und berufliche Qualitäten

~⭐~

Adaptability

Adaptability

~⭐~

Attention to Detail

Attention to Detail

~⭐~

Communication

Communication

~⭐~

Continuous Learning

Continuous Learning

~⭐~

Creativity

Creativity

~⭐~

Critical Thinking

Critical Thinking

~⭐~

Empathy

Empathy

~⭐~

Proactivity

Proactivity

~⭐~

Problem Solving

Problem Solving

~⭐~

Resilience

Resilience

~⭐~

Teamwork

Teamwork

~⭐~

Time Management

Time Management

Wer bin ich?

Full stack and mobile engineer: design fast frontends, solid APIs and production-ready mobile experiences.

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Berufserfahrung

Meine berufliche Laufbahn

Senior Full Stack & Mobile Developer

Solusoft

Januar 2026 - Gegenwart Madrid, Spain

Technical lead for mobile and full-stack delivery: architecture, native Android/iOS and the .NET APIs behind them.

Wichtige Erfolge

  • Promoted to Senior within the same team after 15 months; now the technical reference for 2–3 production apps and 2 internal APIs
  • Led the Transportes Chinchón programme: native Android and iOS apps delivered in feature parity over a shared .NET backend (ApiMovil), my first production iOS release
  • Designed and maintain ApiMovil and the Wemob .NET REST APIs, the single backend shared by web and both native mobile clients
  • Drove the migration of AGEDI, Sisley, Iberext and EPDM towards clean multimodular architecture, enabling a bi-weekly release cadence
  • Established architecture reviews and delivery planning for the mobile team
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Junior Full Stack & Mobile Developer

Solusoft

März 2025 - Dezember 2025 Madrid, Spain

Shipped two Android apps from zero to production (EPDM on Google Play, Iberext in the field) while maintaining the .NET platforms.

Wichtige Erfolge

  • Built and published the EPDM Music Portal Android app end to end (Kotlin, Jetpack Compose, Firebase) on Google Play, with 1,000+ installs
  • Delivered Iberext to production: migrated a legacy Windows tablet app to native Android on a multimodular clean architecture, deployed on 100+ field devices
  • Shipped dozens of features and fixes across AGEDI and Sisley (C#/.NET, SQL Server, Azure) alongside the mobile work
  • Introduced clean, multimodular Android architecture to the team as the baseline for new mobile projects
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Full Stack & Mobile Developer Intern

Solusoft

Oktober 2024 - Februar 2025 Madrid, Spain

First enterprise role: features and maintenance on .NET platforms and the technical groundwork of the Iberext Android app.

Wichtige Erfolge

  • Implemented 10+ new features across the AGEDI projects (C#/.NET, SQL Server) within the first months
  • Maintained the Sisley frontend and backend, resolving production issues under supervision
  • Laid the groundwork of the Iberext Android app (project setup, architecture proposal, first screens), which became the base of the production release
  • Offered a junior contract at the end of the internship
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Bildung

Mein akademischer Hintergrund

Master's in AI Development

Master's in AI Development

BigSchool & Isabel I University

Oktober 2025 - Juni 2026 Madrid, Spain

11-module postgraduate: Software Engineering, Architecture, AI, DevSecOps.

Computer Engineering

Computer Engineering

Universidad Rey Juan Carlos

September 2020 - Juli 2025 Madrid, Spain

Information Technology degree. Móstoles, Madrid. TFG: YouKnow.

Baccalaureate - Technology

Baccalaureate - Technology

IES Maestro Matías Bravo

Januar 2018 - Juni 2020 Madrid, Spain

Valdemoro, Madrid, Spain.

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Kurse und Zertifizierungen

Kontinuierliche Weiterbildung und Spezialisierung

April 2026

Udemy

Kotlin Multiplatform: Intensive Course for Android and iOS

Kotlin Multiplatform: Intensive Course for Android and iOS

Zertifikat Kurs Ansehen
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Projekte

Hervorgehobene Arbeiten

AxiomNode banner: the logo, the tagline "Production-grade microservices platform" and the stack (TypeScript, Python, Kotlin, Kubernetes, Docker)
Code Ansehen

AxiomNode

AI master's final project: a 16-repo microservices platform with an LLM engine (RAG), Kubernetes and a 90% coverage gate.

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Local VPS Orchestrator banner: the logo, the tagline "Self-hosted REST API to orchestrate a VPS" and the stack (Node.js, Express, TypeScript, Docker, RBAC)
Code Ansehen

Local VPS Orchestrator

Self-hosted REST API to run a VPS: RBAC, AES-256-GCM encrypted secrets, 27 route modules and 628 Jest tests.

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Code Ansehen

TutorsAtHome

Distributed tutoring web app: two Spring Boot nodes behind HAProxy, Hazelcast sessions and a RabbitMQ email microservice.

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Computer Vision Labs banner: the monogram icon, the tagline "Road-sign detection and OCR with OpenCV" and the stack (Python, OpenCV, Machine Learning, scikit-learn)
Code Ansehen

Computer Vision Labs

Road-sign detection (MSER + HSV) and an OCR pipeline benchmarking six scikit-learn classifiers, in Python and OpenCV.

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Parking MPI banner: the monogram icon, the tagline "MPI parking-lot simulator in C++" and the stack (C++, MPI, HPC, Concurrency)
Code Ansehen

Parking MPI

MPI parking-lot simulator in C++: every vehicle is a process and an admin process arbitrates the spots, in three versions.

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mBapp banner: the app icon, the tagline "Smart minibar controlled from an Android app" and the stack (Kotlin, Jetpack Compose, C++, PlatformIO, ESP32)
Code Ansehen

mBapp

Robotics team project: a smart minibar with C++/PlatformIO firmware, controlled from a Kotlin + Jetpack Compose Android app.

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Kontakt

Lass uns reden

Nachricht

E-Mail

sebssgarcia502580@gmail.com

Standort

Madrid, Spain

Soziale Medien

This is the legacy v1 portfolio — see the current one →