Javier González Peregrín

My experience encompasses the full development lifecycle, from requirement gathering and UI/UX design to implementing robust backends with NestJS and mobile applications with Flutter, always adhering to clean architecture and software design patterns to ensure scalability. I possess a strong ability to adopt new technologies and collaborate with non-technical stakeholders, translating complex requirements into functional products that solve real-world problems efficiently.

Full Stack Engineer at University of Granada (2025-06 – 2025-10)

Developed and maintained a full stack product using Flutter (mobile) and NestJS (backend) | BIORI

• Followed clean architecture principles
• Served +300 active users across Android and iOS platforms
• Implemented push notifications using Firebase Cloud Messaging (FCM)
• Driven UI/UX optimization based on feedback
• Deployed Backend using Docker Compose

Full Stack Engineer at University of Granada (2024-03 – 2024-10)

Designed and implemented full-stack product using Flutter (mobile) and NestJS (backend) | BIORI

• Applied MVVM pattern and reactive programming (RxDart)
• Secured backend using JWT authentication
• Implemented unit and integration testing using Jest and Supertest
• Deployed backend with Docker Compose, Nginx and PM2
• Managed logs and refined requirements with client
• Designed and iterated UX/UI prototypes based on feedback

Backend Engineer at AGR Gestión y Asesoramiento 2030 SL (2025-02 – 2025-06)

Developed backend application aggregating and normalizing data from multiple APIs into unified finance database

• Collected and analysed client requirements for drafting a scalable project for PowerBI
• Deployed the solution on Microsoft Azure Services
• Performing API sync ~2x faster than initial solution
• Converted and normalized parameters for structured database design
• Designed and iterated UX/UI prototypes based on feedback

M.Sc. in Computer Engineering – University of Granada (2024-09 – 2026-02)

B.Sc. in Computer Engineering – University of Granada (2020-09 – 2024-09)