About Alfonso
Senior Frontend Developer specialized in Angular (from AngularJS to Angular 20) and React (16 to 19) with TypeScript and Redux. Experienced in modernizing legacy applications (Backbone, AngularJS) to current stacks based on Angular or React, and in light backend development with PHP, Node.js/Express, and relational and NoSQL databases.
I focus on maintainability, readability, and security, as well as clear separation of concerns, clean code, the use of design patterns, and solid component architectures. I have experience working with microfrontends and monorepos, managing versions with Lerna and publishing packages to NPM, as well as setting up CI/CD pipelines (Jenkins, GitHub Actions) and deployment workflows in cloud environments. Accessibility has been a consistent requirement in all my projects. At team level, I have provided mentoring, led projects and working groups, and I am used to collaborating in English with distributed teams in Ireland and the US.
Spanish
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- NTT DataTech Lead Specialist (Frontend Architecture)TELECOMMUNICATIONSJanuary 2026 - Today (5 months)Technical leadership for a greenfield, large-scale React frontend in the telecommunication sector. Defining frontend architecture, standards, and delivery practices to enable scalable development across teams.
- INDRAArquitecto FrontendTRANSPORTATIONNovember 2025 - January 2026 (2 months)Short-term project where I implemented a strategy to decouple and externalize assets from Angular libraries for consumption via a CDN, accelerating the delivery cycle.
- Career Break. Personal Open-source projectsUI Architect. Full Stack DeveloperDecember 2024 - Today (1 year and 6 months)Took time to deepen technical expertise in modern frontend frameworks and update personal portfolio through hands-on projects:
- Built with Angular 20 (zoneless), React 19, Redux Toolkit, TypeScript.
- Hexagonal Architecture. Node, Express, MySQL, Prisma and JWT-based Authentication. RBAC.
- Several security features: CORS, XSS, Rate Limiting, CSP Headers, HPP, Token rotation, etc.
- Dockerized and CI-integrated via GitHub Actions & Heroku.
- Versioned using Lerna. Packages published on GitHub.
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Education
- Course on design. Designing for companies.European Design Institute. IED Madrid.2003We learned to design the whole corporate identity of a company. It is a primary task of the corporate communications department to maintain and build this identity to accord with and facilitate the attainment of business objectives.
Certifications
- Mastering Flux and ReduxPlural Sight2018