Frontend Developer & Technical SEO

David Rueda

Frontend Developer with a strong background in technical SEO and web application development. Specialized in React, TypeScript, and e-commerce, I combine my technical and business experience to build fast, accessible, and search-optimized digital products.

Available

For new projects

Projects Contact

Barcelona, Spain

Areas of Specialization

Building modern web applications under Clean Code principles and SOLID principles.
Focus on scalability, collaborative version control, and performance optimization.
Integrating dynamic frontend components with REST APIs and databases.

Technical optimization and web audits focused on maximizing organic indexing.
Core Web Vitals and page speed (WPO) improvements driven by search engine results.
Managing web architecture, efficient crawling, and crawl budget optimization.

Functional maintenance, module enhancements, and template updates in WordPress, PrestaShop, and Shopify.
Planning and executing complex technical migrations from other platforms to Magento.
Conversion Rate Optimization (CRO), checkout enhancement, and user checkout flow optimization.

Advanced container setup in Google Tag Manager.
Implementing Enhanced E-commerce event tracking and custom audiences in Google Analytics 4.
Technical integration of advertising pixels (Facebook Pixel, TikTok, and Google Ads).
Elaborating business performance and search engine results reports using data from Google Analytics 4, Search Console, and Semrush.

Experience

Professional experience

My professional career integrates frontend development, technical SEO consulting, and strategic e-commerce optimization.

Frontend Developer

Barcelona Activa

Nov. 2025 - Present

Lead the frontend development of IT Academy's logical challenges platform, reducing page load times by 30% and achieving 100% WCAG AA accessibility compliance for over 1,000 active students. Collaborate with Backend developers and Product Owners to build dynamic SPA modules using React 19 and TypeScript. Execute agile sprints (Scrum) that cut new features time-to-market in half, and ensure system scalability through strategic refactoring and decoupled component architecture.

ReactTypeScriptAgileScrumGitClean Code

Junior Frontend Web Developer

Lite Solutions

Sept. 2024 - Dec. 2024

Frontend developer specialized in tailored e-commerce systems, achieving an average 15% improvement in Core Web Vitals (LCP and CLS) across online stores powered by WordPress and PrestaShop. Programmed payment gateways and complex interactive features using JavaScript ES6, PHP, and MySQL, optimizing database query times. Reduced mobile bounce rates by 8% through structured semantic markup and advanced responsive design, extending critical core templates and modules.

JavaScriptjQueryWordPressPrestaShopBootstrapPHPMySQLResponsive Design

Search Engine Optimization Specialist

tbb Agency

Jan. 2023 - Jul. 2023

Technical SEO lead for over 50 multinational e-commerce sites and portals (Magento, PrestaShop, Shopify), driving an average 45% increase in organic traffic and 20% growth in conversions. Led a team of 5 SEO consultants, coordinating complex site migrations with zero indexation loss. Architected advanced tracking plans using GTM and GA4 that monitored high-volume transactions, converting user behavior data into actionable growth strategies.

Technical SEOTeam LeadershipMagentoPrestaShopShopifyWordPressGoogle AnalyticsGoogle Tag Manager

Junior Web Positioning (SEO) Technician

tbb Agency

Jan. 2021 - Dec. 2022

Executed technical SEO audits that identified and resolved crawl blocks, increasing search engine indexing speed by 25% across multiple CMS. Responsible for tracking visibility KPIs and designing rich semantic schema structures (Schema.org). Built automated dashboards in Looker Studio that streamlined client reporting, facilitating optimizations that boosted key rankings.

SEOGoogle Search ConsoleWeb AnalyticsWeb OptimizationE-commerce

Education

Education & studies

Technical frontend training combined with a solid background in digital business, marketing, and e-commerce.

Frontend Bootcamp (React)

IT Academy · Barcelona Activa

Mar. 2025 – Jan. 2026

Final project: 10

Intensive program accredited with a UPC University Micro-credential. Practical development of real-world applications using biweekly sprints, covering structured semantic layout to building robust Single Page Applications (SPAs) using React 19 and TypeScript. Integrated databases and authentication with Supabase, optimized REST APIs consumption, and managed collaborative version control with Git. Final project, SEO Compass (collaborative SEO management platform), awarded the maximum grade (10).

React 19TypeScriptSupabaseGitREST APIsAgile

React: Hooks & MERN

DevTalles

Jun. 2024 – Oct. 2024

Advanced specialization in SOLID principles using React.js, functional components, and native/custom Hooks (useState, useEffect, useContext, useReducer). Expertise in dynamic routing via React Router and application state management. Built end-to-end full-stack applications under the MERN stack (MongoDB, Express, React, Node.js), applying Clean Code principles and professional design patterns from day one.

React.jsHooksReact RouterContext APIMERNClean Code

Web Page Design and Publishing (IFCD0110)

The Corner Centre d'Estudis

Mar. 2024 – Oct. 2024

Grade: 9.90

Official 480-hour vocational certificate establishing a solid web development foundation. Mastery of semantic HTML5 for accessibility (WCAG) and SEO, modern CSS3 (layouts using Flexbox, CSS Grid, and media queries), and interactive scripting with vanilla JavaScript. Developed extensive hands-on expertise in the WordPress ecosystem (custom themes, plugins, and WPO optimization) and analytics integration with Google Analytics and Google Tag Manager. Achieved an outstanding final grade of 9.90.

Semantic HTMLAdvanced CSSJavaScriptWordPressBootstrapGoogle AnalyticsGTM

Master in E-Commerce & Digital Marketing Management

Universitat de Barcelona

Sept. 2019 – Jul. 2020

Grade: 9.93

Postgraduate degree focused on digital business strategy approved by the Universitat de Barcelona. Gained deep technical expertise in acquisition channels including technical SEO, SEM/Google Ads, advanced web analytics, and full e-commerce system management. Final master thesis (a comprehensive digital marketing strategy for a private medical clinic) graded 9.5 (overall master grade average: 9.93).

Technical SEOSEMGoogle AnalyticsE-CommerceSocial MediaEmail Marketing

Bachelor in Business Administration (ADE)

Universitat de Barcelona

2015 – 2019

Bachelor's degree with a specialization in Business Organisation and a European Diploma Supplement. Four years of training in executive management, business strategy, corporate finance, marketing, and team leadership. This background provides me with a strong business perspective that I apply directly when developing digital products. Final thesis on the impact of 5G technology in the business sector graded 9.

Business strategyFinancial managementMarketingBusiness OrganisationGeneral management

JavaScript

Google Analytics

Tag Manager

Magento

Shopify

WordPress

Drupal

Teamwork

Tailwind

Git

Node.js

Vitest

SASS

CSS3

React

TypeScript

JavaScript

Google Analytics

Tag Manager

Magento

Shopify

WordPress

Drupal

Teamwork

Tailwind

Git

Node.js

Vitest

SASS

CSS3

Modern React

HooksContext APIState ManagementReact RouterVite

Architecture

Feature-basedTypeScriptJavaScript ES6REST APIsAsynchrony

Quality & Accessibility

Unit testingVitest / JestWCAG 2.2 AAClean CodePerformance (Web Perf)

Technical Marketing

Technical SEO (GSC)Google Analytics 4Google Tag ManagerCMS & E-commerce (WordPress/Drupal/Shopify/Magento)SEO Audits

Management & Agile

Team leadershipAgile methodologiesCross-functional coordination and data-informed decision-makingSprint deliveryProduct focus

Personal projects

My projects

React 19TypeScriptSupabaseVitest

SEO Compass

[Case Study · Grade 10/10] Collaborative SPA designed to centralize technical SEO audits and keyword tracking. Implements a semantic analyzer that simulates Googlebot behavior and an agile task center. Built with React 19, TypeScript, Supabase (auth and relational DB), and comprehensive unit testing with Vitest, optimizing performance for instant load times.

React 19TypeScriptTailwind CSSSupabase

MovieApp

Cinematographic web app focused on smooth user experience (UX) and rendering optimization. Solves costly DOM operations via list virtualization and asynchronous loading (infinite scroll), dynamic real-time filtering without lag, and favorites state persistence using React 19, Tailwind CSS, and Supabase.

React 19React Hook FormZodTailwind CSS

Budget Calculator

Interactive calculator for complex digital service quotes. Developed under a career-focused modular architecture with strict data validation using Zod and React Hook Form. Implements state serialization and persistence via URL query parameters, enabling instant budget sharing without server round-trips.

JavaScript ES6Tailwind CSSPokéAPIFetch API

Pokédex Classic

Modular web application that serves as an interactive Pokédex using the public PokéAPI. Features Pokémon search by name/ID, type filtering, detailed stats, ability descriptions, and sequential navigation. Built with JavaScript ES6, HTML5, and Tailwind CSS.

More projects on

Let's work

together

Available for collaboration on frontend development, technical SEO consulting, or digital marketing strategies. I deliver efficient solutions combining quality code with conversion goals and search engine performance.

Contact

David Rueda Rosas

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GitHub

druedaro

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ruedarosasdavid@gmail.com

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