TCR: test && commit || revert
Exploring the TCR (test && commit || revert) technique introduced by Kent Beck, its variations, and a practical example with Rope in Python.
Hey, I'm Miguel Fernández Senior Frontend Developer & AI Engineer
I build web applications and ship products. Specialized in React, Vue, Next.js, and TypeScript, with a focus on AI-powered solutions. Based in Alicante, Spain.
About Me
I'm a senior frontend developer with 4+ years of experience building web applications and shipping products. I specialize in React, Next.js, Vue, and TypeScript, with a strong focus on AI-powered development.
I recently completed a Master's in AI Development at BIG school, covering LLMs, RAG, AI agents and orchestration. Previously I worked at INDITEX Group improving performance, at Doctomatic building full features from REST API endpoints to UI, and I also created and monetized Chrome extensions.
I hold a Bachelor's in Computer Engineering from Universidad de Alicante, with an Erasmus+ semester at Cracow University of Technology. I create open-source translations for Vitest, React, Vite, MDN, and Astro docs.
Work Experience
Owning frontend implementation and maintenance across all projects. Migrating the main SaaS dashboard from Bootstrap to multitenant SCSS architecture. Building client landing pages in Vue, Nuxt and Vite from Figma designs.
Shipping AI-powered SaaS products, client websites, and a monetized Chrome extension. Projects include Healthspan, PhotoHouseAI, Game Portrait, DeskBreak, and FotoCV.
Restructured the main screen layout, refactored code into React Hooks for performance, and migrated legacy projects to current versions. Implemented unit tests with Jest and React Testing Library. Mentored junior developers.
Built the testing environment (unit, e2e, UI). Developed full features from REST API endpoints to UI. Containerized APIs, databases and external service mocks with Docker.
Built responsive layouts with HTML5 and CSS3. Migrated components from Vanilla JS to React, implemented new views in an internal web app.
Education
Oct 2025 - Jan 2026
Master's in AI Development
Intensive, hands-on program focused on building products with AI. Key topics: LLM fundamentals and generative AI, prompt engineering, RAG with vector databases and semantic search, AI agents and orchestration, process automation, and deployment.
Software Engineering specialization. High Academic Performance Group in English. Cambridge C1 Advanced certification.
Semester abroad focused on Neural Networks and Artificial Intelligence.
Open Source
Contributions and community projects.
Latest Articles
Some of my recent thoughts