Open to side projects & collaborations

Alan
Teixidó.

Software Engineer — Backend · Mobile · Cloud

I build APIs that hold up in production, systems that scale, and mobile apps that ship. Based in Barcelona.

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Years engineering

Tech stacks

Languages spoken

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Profile

About me

Software engineer focused on backend systems, mobile delivery, and production-grade software. I enjoy building reliable APIs, clean architectures, and scalable workflows across development and deployment. My work combines technical depth with execution — from system design to CI/CD and real-world product delivery.

Barcelona, Spain
teixido.alan@gmail.com

Language proficiency

Catalan Native

Spanish Native

English C1 — Advanced

French Basic

Career

Experience

Plain Concepts

2025 — Present

Software Engineer — Fullstack

Remote · Barcelona, Spain

.NET (C#) React Native PostgreSQL Azure DevOps Firebase Docker CQRS MediatR

Designed scalable REST APIs following CQRS and MediatR patterns within a Clean Architecture codebase
Built versioned API contracts (v1) backed by integration and end-to-end test coverage
Built and maintained Azure DevOps CI/CD pipelines to streamline Android and iOS release workflows
Led migration to Firebase App Distribution with Crashlytics for real-time crash reporting and Analytics for usage insights
Designed and optimized relational schemas using PostgreSQL and Entity Framework Core, focusing on query performance and data integrity

Quantion

Oct 2024 — Mar 2025

Backend Developer (.NET) — Internship

Barcelona, Spain

.NET (C#) REST APIs Azure DevOps Git

Shipped backend features in .NET (C#) within a live production codebase from day one
Built and validated REST API endpoints with automated test coverage to ensure reliability
Refactored legacy code applying Clean Code principles and established architectural patterns
Contributed to iterative delivery cycles within a cross-functional Scrum team

SJAS Summer Camp

Jul — Aug 2024

Camp Counselor

Lucerne, Switzerland

Led international groups in structured outdoor and team-based activities
Strengthened leadership, communication, and cross-cultural teamwork skills

CamperXpress

May — Jul 2022

Sales Representative & Web Developer

Barcelona, Spain

Managed sales pipeline and client support for a growing business
Developed and maintained the company website

Pista Cero Informática

Jun 2021 — Apr 2022

Hardware Technician

Barcelona, Spain

Assembled, repaired, and upgraded computer systems
Assisted with server maintenance and infrastructure support
Provided technical support to end users

Engineering

Selected work

Backend API Systems

Scalable backend APIs built with modern architecture patterns, focused on maintainability, performance, and clean design.

.NET (C#) CQRS MediatR REST APIs API Versioning

Designed and implemented structured API architectures
Worked with versioned endpoints and backward compatibility
Applied integration and contract testing for stability

Mobile Apps & Delivery Systems

Mobile applications and delivery workflows with a focus on automation, release reliability, and production monitoring.

React Native Azure DevOps Firebase CI/CD

Built and maintained CI/CD pipelines for Android and iOS
Improved release workflows and app distribution processes
Integrated monitoring and crash analytics into production

Database & System Design

Relational database design and backend architecture with emphasis on scalability, data integrity, and long-term maintainability.

PostgreSQL Entity Framework Core Docker

Designed relational data models for scalable systems
Implemented structured backend data access layers
Improved system architecture for performance and maintainability

Fullstack Application

Fullstack training management platform built from scratch, combining a structured frontend with a custom backend API and relational data model.

Vue.js JavaScript Node.js REST API PostgreSQL

Built a complete fullstack application including frontend and backend
Designed backend architecture using controllers, middleware, models, and routes
Developed API endpoints supporting real application workflows
Structured relational data models for scalability and maintainability
Implemented end-to-end features from UI to database

Stack

Technical skills

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Backend & Architecture

.NET (C#) ASP.NET Core REST APIs CQRS MediatR API Versioning Clean Architecture

Frontend & Mobile

React Native React Vue.js TypeScript JavaScript Expo

DevOps & Cloud

Azure DevOps Docker Git CI/CD Pipelines

Databases

PostgreSQL Entity Framework Core SQL

Other Languages

Kotlin Python PyInstaller

Monitoring & Analytics

Firebase Analytics Crashlytics App Insights

What's Next

Looking forward

"I want to build systems that don't just execute logic — but that make software genuinely smarter."

I'm especially interested in the intersection between software engineering and AI — exploring how modern backend systems can integrate intelligent capabilities in a reliable and production-ready way. The same engineering principles apply: clean design, testability, and systems that hold up under real-world conditions.

AI & Machine Learning

Understanding ML fundamentals and how to apply them meaningfully within backend systems.

Language Models & APIs

Exploring how language models can be integrated into production APIs in a practical, reliable way.

Intelligent Backend Systems

Designing APIs and services that incorporate AI capabilities without sacrificing reliability.

Data-driven backends

Building systems that process, expose, and act on data in smarter, more adaptive ways.

Continuous learning

Staying sharp through side projects, technical reading, and hands-on experimentation.

Alan
Teixidó.

About me

Experience

Projects

Pokédex App

Crypto Tracker

Minesweeper