Freelancer profile translated to English.

Description

Senior frontend developer with 20 years of experience working in advertising, banking, telecommunications, travel, and retail.

I can help you if you need to evolve an existing application, create or improve a component library, incorporate automated testing, review and fix accessibility issues, optimize CI/CD pipelines, or automate internal processes with tools like n8n.

My areas of expertise:

**Applications and components**: creation of web applications with Next.js, Astro, TypeScript, React, or Web Components, and development of reusable component libraries within design systems.
**Web accessibility**: review and improvement of interfaces according to WCAG criteria, use of semantic markup, ARIA, testing with screen readers, and integration of tools like Axe Core.
**Testing and quality**: design and implementation of multi-level testing strategies (static, unit, component, and e2e) with Storybook, Vitest, or Playwright, and integration into workflows and CI/CD pipelines.
**Automation and AI**: design of workflows with n8n for internal process automation, content generation, or the creation of conversational AI assistants.

I am practical, autonomous, and highly committed.

My goal is to make things simple and easy to maintain so they are sustainable in the long term.

Industry field of expertise

Languages

Spanish
Native or bilingual
English
Conversational

Workplace preferences

Remote only

Primarily works remotely

CAPITOLE CONSULTING
Frontend Platform Engineer
RETAIL (SMALL BUSINESS)
January 2025 - May 2026 (1 year and 4 months)
Working in the Productivity team for a retail client, focused on improving the development experience, quality standards, and automation of technical processes.

Key contributions:
Improvement of React project templates, including updating documentation, test examples, and linting configuration to promote best practices with React Testing Library.
Implementation of a self-service e2e testing module on an internal development platform, with base configuration for Playwright, GitHub Actions workflows, and technical documentation.
Development of an automated web accessibility analysis system through crawling, browser automation with Playwright, and analysis with axe-core.
Prototyping of agentic systems for automated functional testing using LLMs, MCP tools, and PydanticAI.
Github Actions Accessibility Python Playwright Agentic AI
Quadrant TravelTech
Frontend Architect
TRAVEL AND TOURISM
March 2024 - August 2024 (5 months)
Development and evolution of a backoffice application for Quadrant Traveltech, an e-travel startup, working with Next.js, React, TypeScript, Tailwind CSS, and React Query.

In addition to developing new features, I participated in improving build, testing, and deployment processes, focusing on quality, automation, and development experience.

Key contributions:
Development and evolution of frontend features in a backoffice application with Next.js, React, TypeScript, Tailwind CSS, and React Query.
Design and improvement of CI/CD pipelines in Bitbucket and GitLab, including early validations to prevent errors before production.
Optimization of build, tagging, and deployment processes, reducing CI times and automating changelog generation.
Migration of the test runner from Jest to Vitest, significantly improving local execution times for the development team.
Technical mentoring on testing and implementation of new e2e and visual regression testing strategies.
Improvement of development environment tooling and configuration to facilitate the team's daily work.
Mentoring and technical support to the team on frontend best practices, testing, and automation.
Gitlab CI/CD React.js Next.js Typescript TailwindCSS
Interacso
Frontend Architect (Quadrant Travel Cloud)
May 2023 - March 2024 (10 months)
Development of a front-end management application for travel agencies using React, NextJS, React Query, TypeScript, Tailwind CSS, Docker, Vitest, Testing Library, Storybook, Playwright, and REST API, among other technologies.
Configuration of pipelines in Bitbucket for the automation of quality control processes and application versioning.
Technical leadership and mentoring.
Next.js React.js Typescript Tailwind Gitlab CI/CD