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Lady Johana Martinez D.LJ

Lady Johana Martinez D.

Front-end Developer React + Next.js

€360/day
Toulouse, FR
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Lady Johana Martinez

Hello,

I am a Colombian professional passionate about design, web development, digital marketing, and eco-responsible creation. Based in Toulouse.

With over 15 years of experience, I have collaborated on projects for various sectors: European Union, education, health, construction, IT, communication, design, arts, transport, veterinary, among other sectors.

What I do:

Website development and optimization: redesign, content improvement, SEO, and technical performance.

Data analysis and visualization: creation of statistics and interactive dashboards using Tableau and other platforms.

Digital strategy & marketing: community management, multi-channel campaigns, branding, and advertising.

Eco-responsible creation & social projects

Technical skills:

Web development (Front-end & Back-end, Next.js, React, Tailwind, AWS, Postgres. Lighthouse 95+. Custom-managed CMS.)

Digital marketing & SEO

Data analysis and visualization (Tableau, Google Analytics, Data dashboards)

Graphic design & visual identity (logos, graphic charters, UX/UI)

My goal: to combine creativity, technology, and social responsibility to offer innovative and sustainable solutions to my clients.
  • English

    Conversational

  • Spanish

    Native or bilingual

  • French

    Fluent

Remote only
Primarily works remotely

Experience

  • Hacienda Las Margaritas
    New web platform with Next.js
    HOSPITALITY
    May 2026 - June 2026 (1 month)
    Carmen de Apicalá, Colombia
    Restructured a 2013 HTML site hosted on a secondary domain into a high-performance Next.js platform, on the correct domain — haciendamargaritas.com
    A complete restructuring, with a modern stack (Next.js) built for performance and SEO.

    1. Maximum Performance (Core Web Vitals close to 100)
    LCP (Largest Contentful Paint): < 1.5s on 4G.
    CLS (Cumulative Layout Shift): almost zero, no layout shifts.
    INP (Interaction to Next Paint): < 100ms.
    On Lighthouse mobile, we are at scores 95+ in performance, 100 in accessibility, 100 in SEO. In concrete terms: Google treats the site as a benchmark in its sector, and visitors no longer close the tab while it's loading.

    2. Real Showcase of Hotel Services
    Each service (cabins, pool, family area, events) now has its own page, with optimized photos, short descriptions, and a booking button. The gallery has been reworked so that the images are appealing without weighing down the loading.

    3. Own Domain, Strong Identity
    The old site lived on a secondary domain that no longer embodied the brand. We refocused the entire online presence on haciendamargaritas.com — a clear, memorable domain that matches the hacienda's name. No more confusion, no more broken redirects, and a consistent brand signal for both Google and visitors.

    4. End-to-End Technical SEO
    Meta tags, OpenGraph, and Twitter Card on each page (WhatsApp and Facebook shares now display photo + title + description).
    Schema JSON-LD for accommodation establishments (Google can display the hacienda in the hotel rich results).
    Auto-generated XML sitemap, clean robots.txt.
    Structured content for local searches ("cabañas Carmen de Apicalá", "hacienda eco-touristique Tolima")
    React.js & Next.js React / Next.js Technical SEO Schema JSON-LD Site Restructuring
  • Nitro Publicidad
    Next.js Stack with Custom CMS, Integrated Product Catalog, and Online Quoter
    PUBLISHING
    May 2026 - Today (1 month)
    Bogotá, Colombia
    Restructuring of the site from WordPress to a Next.js stack with custom CMS, integrated product catalog, and online quoter. Core Web Vitals close to 100, visual identity preserved for
    1. Managed CMS, designed for Nitro
    A clean back-office, tailored for the printing business. No third-party plugins to update, no risk of breaking everything by clicking in the wrong place. Each screen corresponds to a real need of the team — and only the Nitro team has access to it.

    2. Integrated Catalog, No More PDFs
    The catalog is now on the site. Each product has its own page, with optimized photos, description, and technical specifications. Google indexes them one by one — Nitro gains visibility on highly targeted searches ("impression sur verre Colombie", "tampographie industrielle").

    3. Online Quoter
    An integrated quote module: the visitor selects the product, quantity, options, and gets an estimate or requests a detailed quote. Less friction for the prospect, less back-and-forth for the sales team.

    4. Redesigned UX/UI, Preserved Identity
    This was a strong request: to maintain Nitro's design style and feel — the deep blacks, the signature green, the dynamic typography. We kept the brand concept, but reworked every interaction:

    careful micro-animations,
    fluid transitions between categories,
    every pixel designed to serve the product, not just decorate.
    5. Core Web Vitals Close to 100
    As with Hacienda Las Margaritas, we pushed performance to the maximum:

    LCP < 1.5s.
    CLS almost zero.
    Lighthouse Performance 95+, SEO 100.
    React.js & Next.js Technical SEO Managed CMS Online Quoter Integrated Catalog
  • colombia ecommerce
    E-commerce Website
    E-COMMERCE
    April 2026 - May 2026 (1 month)
    Bogotá, Colombia
    100% Next.js infrastructure with custom-developed CMS
    Over 10 years of continuous development and client trust
    React Server Components: server-rendered pages
    Core Web Vitals close to 100/100, green on mobile and desktop
    Payment system integrated into the site, no external redirection
    Persistent cart that survives reloads and browser closures
    Responsive catalog search and filters
    Automatically optimized images and fonts
    Zero unnecessary third-party scripts slowing down the site
    Cart and checkout endpoints protected against bots
    Transactional emails (order, password) via proprietary API
    Technical SEO: JSON-LD schema, meta tags, XML sitemap, canonical
    Clean and maintainable code, with automated deployment (CI/CD)
    Monthly maintenance contract and continuous evolution
    The client retains full ownership of their data and code
    🇫🇷
    100% Next.js infrastructure with custom-developed CMS
    Over 10 years of continuous development and client trust
    React Server Components: server-rendered pages
    Core Web Vitals close to 100/100, green on mobile and desktop
    Payment system integrated into the site, no external redirection
    Persistent cart that survives reloads and browser closures
    Responsive catalog search and filters
    Automatically optimized images and fonts
    Zero unnecessary third-party scripts slowing down the site
    Cart and checkout endpoints protected against bots
    Transactional emails (order, password) via proprietary API
    Technical SEO: JSON-LD schema, meta tags, XML sitemap, canonical
    Clean and maintainable code, with automated deployment (CI/CD)
    Monthly maintenance contract and continuous evolution
    The client retains full ownership of their data and code
    Infrastructure (AWS + Postgres) Technical SEO Core Web Vitals optimisés Web Development (Next.js + Tailwind) Web Design (UX/UI)

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Education

  • Graphic Designer
    CUN
    2009
    Designer Graphique

Skill set

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