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Hi, I’m Alejandro Aparicio Guerra, a passionate mobile and web developer based in Albacete, Spain. I design and build robust web and mobile applications with a focus on performance, maintainability, and scalable architectures. Experienced in developing web and mobile apps using JavaScript, TypeScript, and Python, with strong command of React Native, React.js, and modern tooling. I’m always eager to collaborate, learn, and apply my skills to solve real-world problems. I’m seeking opportunities to contribute to impactful projects and continue growing professionally.…Hi, I’m Alejandro Aparicio Guerra, a passionate mobile and web developer based in Albacete, Spain. I design and build robust web and mobile applications with a focus on performance, maintainability, and scalable architectures. Experienced in developing web and mobile apps using JavaScript, TypeScript, and Python, with strong command of React Native, React.js, and modern tooling. I’m always eager to collaborate, learn, and apply my skills to solve real-world problems. I’m seeking opportunities to contribute to impactful projects and continue growing professionally.

Alejandro Aparicio Guerra

Front-End Developer, Full Stack Developer, Web Developer, +3

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Hi, I’m Alejandro Aparicio Guerra, a passionate mobile and web developer based in Albacete, Spain. I design and build robust web and mobile applications with a focus on performance, maintainability, and scalable architectures. Experienced in developing web and mobile apps using JavaScript, TypeScript, and Python, with strong command of React Native, React.js, and modern tooling. I’m always eager to collaborate, learn, and apply my skills to solve real-world problems. I’m seeking opportunities to contribute to impactful projects and continue growing professionally.…Hi, I’m Alejandro Aparicio Guerra, a passionate mobile and web developer based in Albacete, Spain. I design and build robust web and mobile applications with a focus on performance, maintainability, and scalable architectures. Experienced in developing web and mobile apps using JavaScript, TypeScript, and Python, with strong command of React Native, React.js, and modern tooling. I’m always eager to collaborate, learn, and apply my skills to solve real-world problems. I’m seeking opportunities to contribute to impactful projects and continue growing professionally.

Available to hire

Hi, I’m Alejandro Aparicio Guerra, a passionate mobile and web developer based in Albacete, Spain. I design and build robust web and mobile applications with a focus on performance, maintainability, and scalable architectures.

Experienced in developing web and mobile apps using JavaScript, TypeScript, and Python, with strong command of React Native, React.js, and modern tooling. I’m always eager to collaborate, learn, and apply my skills to solve real-world problems. I’m seeking opportunities to contribute to impactful projects and continue growing professionally.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Spanish; Castilian

Fluent

English

Advanced

Portuguese

Intermediate

Work Experience

Mobile Developer at Genetic Dream

June 1, 2023 - November 8, 2025

Migrated the mobile app to an Expo and TypeScript ecosystem, significantly improving development efficiency, maintainability, and code reliability. Implemented advanced global state management patterns using Redux Toolkit with Context API and custom hooks for specific modules. Integrated back-end services with Nest.js, deployed via Firebase Cloud Functions, connecting through the React Native Firebase library to enable scalable, event-driven architecture. Designed and implemented a local SQLite database using TypeORM, providing robust offline-first experience and data consistency in low-connectivity scenarios. Developed custom Expo Native modules to integrate CubiC as a native SDK for generating 2D and 3D floor plans, involving native development in Swift and Kotlin, CocoaPods, and Swift Package Manager to connect CubiC REST services. Contributed to native configuration and integration of Zoom Video SDK for React Native, ensuring stable and efficient video communication features. Added

Mobile Developer at SensorData

August 1, 2023 - August 1, 2023

Maintained and enhanced the SensorData mobile app for Android and iOS using React Native with CLI; automated version publishing to App Store and Google Play using Fastlane; resolved bugs and implemented new features including push notifications with OneSignal; redesigned views to improve usability and navigation; utilized react-native-maps for real-time equipment location and critical alerts.

Web and Mobile Developer at Basspago

August 1, 2022 - August 1, 2022

Developed new views with Material UI and integrated processes into the Basspago payment and web services platform using React.js, with a mobile version using React Native CLI and TypeScript. Integrated Firebase services for authentication and data persistence, implemented KYC processes with SUMSUB SDK, and generated PDFs invoices from the front end. Implemented advanced security measures including 2FA and participated in Agile Scrum practices to drive iterative development and quality improvements.

Web and Mobile Developer at Elastic Dev Team

August 1, 2022 - August 1, 2022

Developed new views using Material UI; integrated functionalities into the EcoLoG web platform with React.js and its mobile version via React Native CLI and TypeScript. Integrated Firebase services for user authentication (Firebase Auth) and real-time data persistence (Firestore), designed a Dynamic Questions module for flexible form creation aiding strategic decision making, and promoted reusable component architecture to improve maintainability and development practices.

ERP Next Developer at IntelliSys

January 1, 2021 - January 1, 2021

Developed and customized modules in ERPNext to adapt the system to client requirements using Python and JavaScript; implemented user interfaces with HTML and CSS for intuitive UX; configured MariaDB databases for efficient transactional data storage and ERP configuration.

Backend Developer at TodoLegal

October 1, 2020 - October 1, 2020

Developed REST services using FastAPI (Python) for creating and managing Smart Contracts, optimizing performance and scalability; implemented dynamic reporting using ReportLab to generate customizable reports; integrated AWS solutions for API deployment and scalability (AWS Lambda, S3); implemented monitoring and logging to improve traceability and incident resolution.

Systems and Network Administrator at Cuba

July 1, 2020 - July 1, 2020

Administration and maintenance of Linux servers (CentOS, Ubuntu, Debian) with focus on security, performance, and ongoing monitoring; virtualization management with VMware, KVM, Proxmox, and Docker for resource optimization; LAN/WAN network design and security (IPSec, VLAN, VPN, firewalls); troubleshooting software and hardware issues and supporting office tools.

Mobile Developer at SensorData

August 31, 2023 - August 31, 2023

Maintained and enhanced the SensorData mobile app for Android and iOS with React Native CLI. Automated version deployment to Apple App Store and Google Play using Fastlane. Resolved bugs and added features including push notifications (OneSignal). Designed new views to improve UX and navigation. Implemented real-time equipment-location visualization with react-native-maps, including critical alerts.

Web and Mobile Developer at BassPago

May 31, 2023 - May 31, 2023

Developed views with Material UI and integrated processes into BassPago payment and web services platform using React.js and React Native CLI + TypeScript. Integrated Firebase for SMS authentication and Google 2FA. Implemented KYC via SUMSUB SDK. Created front-end PDFs for invoices for traceability and compliance. Implemented 2FA security and participated in Scrum agile teams to drive iterative development and code maintainability.

Web and Mobile Developer at Elastic Dev Team

August 31, 2022 - August 31, 2022

Developed views with Material UI and integrated processes into the BassPago payment platform using React.js and React Native CLI + TypeScript. Implemented Firebase for SMS authentication and Google 2FA. Implemented KYC via SUMSUB SDK. Created front-end PDFs for invoices. Implemented 2FA. Participated in Scrum. Also designed a Dynamic Questions module to enable flexible form creation for strategic decision making and improved data collection; contributed to reusable component architecture and code maintainability.

Intellisys Developer at Intellisys

January 31, 2021 - January 31, 2021

Developed customized ERPNext modules using Python and JavaScript to adapt the system to client requirements. Built user interfaces with HTML/CSS ensuring intuitive UX. Configured MariaDB databases for transactional data and ERP configuration.

Back-end Developer at Todo Legal

October 31, 2020 - October 31, 2020

Developed REST services using FastAPI (Python) for creating and managing Smart Contracts; optimized operations for performance and scalability. Implemented dynamic reports with ReportLab, enabling customizable report generation. Integrated AWS services for API deployment and scalability (AWS Lambda, S3). Implemented monitoring and logging to improve traceability and incident resolution.

Systems and Network Administrator at Cuba

July 31, 2020 - July 31, 2020

Administration and maintenance of Linux servers (CentOS, Ubuntu, Debian) focusing on security, performance, and continuous monitoring. Implemented virtualization with VMware, KVM, Proxmox, and Docker. Designed LAN/WAN networks with security protocols (IPSec, VLAN, VPN, firewall) and optimized connectivity and equipment management. Resolved software/hardware problems and supported accounting software and office tools.