Arnau Marquilles — Technical Lead Frontend Engineer

Career

Experience

Where I've built and led

2024 — Present

Technical Lead

Architecting and overseeing end-to-end delivery of high-revenue flight upgrade systems within a mobile-first ecosystem. Leading all strategic decisions on tech stack, scalable architecture, and deployment pipelines. Managing stakeholder communication and technical roadmaps.

React TypeScript Micro-frontends Azure DevOps A/B Testing

2023 — 2024

Frontend Developer

Openbank

Developed core software for the German market in a highly regulated banking environment. Managed critical production resolution and led strategic legacy code migrations to modern, scalable frameworks.

React TypeScript Jest Storybook Docker

2022 — 2023

Frontend Developer

Atrápalo

Led the migration from a monolithic architecture to a micro-frontends ecosystem using React, Next.js, and TypeScript. Implemented Domain-Driven Design (DDD) with a strict focus on web performance, SEO, and accessibility.

React Next.js TypeScript Micro-frontends DDD

2019 — 2021

Full Stack Developer

NTT DATA

Developed and tested internal critical applications for CaixaBank, handling both frontend (React) and backend integration services. Collaborated directly with clients to translate business requirements into technical solutions.

React Node.js Express MongoDB Java

Portfolio

Projects

Selected case studies

Tech Lead Professional Fullstack Long Read

Lufthansa Group — Flight Upgrade Flow

Rebuilt the flight upgrade experience as a cross-platform, multi-tenant micro-frontend — serving millions of passengers across 6 airline brands, web, and mobile.

Next.js React TypeScript Vite

Solo Dev Personal AI/LLM Long Read

Resumer — AI Resume Analyzer

A fully serverless AI-powered resume analyzer. Upload your PDF and a job description to receive scored feedback across 5 categories — with zero backend infrastructure.

React TypeScript Puter.js pdf.js

Solo Dev Personal Frontend Quick Read

This Portfolio — Why Astro SSG

Why Astro SSG is the right tool for a fast, SEO-friendly portfolio — pre-rendered HTML, zero runtime JS, self-hosted fonts, and a perfect 100 Lighthouse performance score.

Astro.js TypeScript Tailwind CSS Vanilla JS

Toolkit

Skills

Technologies I work with

Core & Languages

HTML5

CSS3

SASS

JS

TS

Frameworks & Libraries

React.js

Redux

Vue.js

Next.js

Astro.js

DevOps & Cloud

Git

Docker

Cloudflare

Azure DevOps

Nginx

Monitoring & Testing

Elastic

Kibana

Jest

Vitest

Playwright

Dev Tooling

npm

Webpack

Vite

Postman

Storybook

Backend & Databases

Node.js

Mongo DB

MySQL

Redis

Postgre SQL

AI & Automation

Claude

Gemini

Copilot

OpenAI

n8n

Connect

Contact

Let's work together

I'm always open to discussing new opportunities, interesting projects, or ways to bring ambitious ideas to life.

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