Mario De La Cruz Melo
Mario De La Cruz Melo

Senior Frontend Engineer

Actively looking · Member since 12 Oct 2026
Location
Barcelona, Spain
Desired salary
Unspecified
Work preference
Remote Only
Experience level
Senior

About

Professional summary

I am a Frontend Engineer with more than seven years of experience building and maintaining web applications using React, TypeScript, and Next.js.

I take product features from initial scoping through production delivery, with a strong focus on maintainable architecture, performance, and reliable user experiences.

I regularly promote and teach engineering practices such as SOLID principles and Clean Architecture. I enjoy helping teams adopt patterns that make frontend systems easier to evolve.

My experience extends across the frontend-backend boundary, including identity provisioning, SSO integrations, REST and GraphQL APIs, and PHP or Node.js services.

I have led major frontend rewrites, performance optimization initiatives, internationalization work, and end-to-end testing migrations. I am comfortable owning complex technical initiatives while collaborating across product and engineering teams.

I am fluent in Spanish and English and am available for fully remote roles.

Skills

36 capabilities

Tech stack & tools

Working toolkit

Application Hosting

Collaboration

Communications

Design

Languages & Frameworks

Libraries

Experience

Career history

Frontend Engineer Exoticca (Pangealand SL)

I run internal training on SOLID and Clean Architecture for the frontend team and propose engineering practices adopted by the team. I co-created the foundations for a new advisor repository where the frontend is built around Clean Architecture, and participated in a company-wide audit of the Next.js frontend.

I localized the site for French-speaking Canada, covering content, routing, and locale-aware formatting. I maintain the Playwright E2E suite following the migration from Cypress, own feature delivery for an internal tool, improved inherited code, and built client-side filtering for a high-volume flight dataset.

Full Stack Engineer Freightos WebCargo SL

I led the end-to-end rewrite and performance optimization of a dashboard from vanilla JavaScript, HTML, and CSS to React. I planned and delivered product features in TypeScript and React, from ticket scoping through production deployment using CI/CD.

I led a SCIM integration with Microsoft, connecting external identity-provisioning APIs to the in-house backend for user lifecycle management, while maintaining Okta SSO logins. I also ran integration proof of concepts, conducted cross-team code reviews, managed complex asynchronous state with Redux-Saga, and tested critical booking and pricing workflows.

Full Stack Developer dotravel.com (Things To Do SL)

I integrated frontend applications with backend services, managing CORS, authentication flows, and private-route access control. I built React components and AMP-compatible pages consuming PHP Symfony APIs for SEO-critical content.

I also connected Node.js microservices to the React frontend in a Google Cloud environment, contributing to performant content delivery and service integration.

Education

Learning history

UTHUB

Videogame Developer Certificate, Videogame Development

Spanish Ministry of Education

Professional Certificate Level 3, Web Design and App Development

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