Antonio Martínez Fernández

As a Frontend Developer, I design and implement high-performance, reactive interfaces for the Metrica Nexus cross-platform application, taking end-to-end ownership of features in a fast-paced startup environment. - Developed and maintained frontend features with Angular (v14) for the Metrica Nexus product (desktop and mobile apps). - Took ownership of end-to-end features, collaborating with a diverse, international team in a fast-paced startup environment. - Built reactive and high-performance interfaces using RxJS. Partnered with designers to improve UX/UI experiences. - Worked on cross-platform applications with Electron and Ionic.

As the owner and Lead Developer of an open-source cross-platform music streaming application, I have been at the forefront of replicating and enhancing Spotify's functionalities while incorporating unique user-requested features such as the ability to upload personal music. - Led a global open-source team of 25+ contributors using Agile methodologies, managing Git/GitHub workflows, PRs, and issue tracking. - Developed REST APIs using Python, FastAPI, and MongoDB, including JWT-based authentication. - Designed a scalable music streaming architecture leveraging AWS (S3, CloudFront, Lambda) for storage, CDN, and serverless processing. - Built a cross-platform desktop application with React, TypeScript, and Electron, featuring a Spotify-inspired UI. - Implemented Dockerized environments, CI/CD pipelines with GitHub Actions, and automated testing with Jest, React Testing Library, and pytest.

Participate in all stages of software development for ROSITA2, an embedded system for bioreactors, developing both frontend and backend solutions while ensuring seamless integration with hardware. - Development of Rest APIs and microservices using Python and FastAPI. Usage of Redis queues and events for fast and efficient microservices communication. - Design and development of a touchscreen and desktop application interface for real-time management of bioreactors with Angular (v12-19), Bootstrap and Neutralino. Successfully migrated all systems from Angular 12 to 19. - Software lead for bSmart devices such as CT1 and bBreath4 obtaining integrated backend-frontend solutions and working closely with electronics teams for integrating low level hardware software. Led meetings for retrospective analysis and future planning based on requirements and user feedback. - Contribute to architecture planning and decision-making for system design. - Worked extensively with technologies such as OPC UA and Asyncio. - Unit and integration tests with pytest as well as extensive testing with physical prototypes to ensure reliability and performance. Testing with Jasmine and Karma to validate frontend product requirements.

- Led end-to-end website development from concept to production deployment. - Designed the UI/UX to create a professional, user-centered digital experience aligned with brand identity. - Built a responsive, performance-optimized frontend ensuring seamless cross-device compatibility. - Managed deployment, optimization, and launch, delivering a fully operational production-ready website.

Developed the backend and frontend for a travel application structured around points of interest (POIs). - Developed the organizational structure and navigation through countries, regions, cities, and points of interest using PHP. - Data persistence using MySQL. - Organized content graphically using HTML, CSS and JavaScript.