Hey!, I'm Cortesa
Open to Work

With 8 years of experience building websites and apps. I focus on building clean, modern, and scalable solutions. I have a real passion for transforming legacy code into efficient, maintainable systems using the latest technologies.

Driven by problem-solving and team collaboration, I bring proactive ideas that improve both the codebase and the user experience.

Let’s build something great together.

Tech stack

Vite
React
Typescript
Sanity
Claude
Jotai
CSS
HTML
Node.js
Express
Git
GitHub
Blockchain
Astro
Tailwind
SCSS

Portfolio

Yolorekt project preview

Project name: Yolorekt

Company: Yolorekt

I have developed YOLOrekt’s real-time prediction platform UI with React, TypeScript, Jotai, and Socket.io, ensuring responsive and tested interfaces. Deployed via AWS Amplify in collaboration with designers and cross-functional teams.

React
Socket.IO
Jotai
Corn project preview

Project name: Corn

Company: Number Group

At NumberGroup I built and maintained modern, responsive UIs using React, TypeScript and Styled‑Components, managing state and data with Zustand and React Query. I implemented Web3 features via Wagmi and Viem, collaborated through Git and Jira.

React
React Query
Zustand
IN PROGRESS
Cor UI Kit project preview

Project name: Cor UI Kit

Company: Cortesa

This component library delivers a suite of modern, reusable UI elements built with React and TypeScript. It streamlines front‑end development by providing accessible components that integrate seamlessly into any project.

React

Lab

Vite
React
SSR
SCSS

Movie Explorer

Browse films by selectable categories, view details, zoom poster images, and manage a simple, non-persistent wishlist. No account or persistence—your selections reset on refresh.
React
Tailwind
Jotai

Weather

Weather is a web application that fetches real-time weather data using the wttr.in API. Users can search for a city to view current conditions and upcoming forecasts in a clean and intuitive interface.
React
Dnd kit
Tailwind

Kanban

Kanban is an online tool for managing projects and tasks using the Kanban method (not production ready). Developed by cortesa.net, it offers an intuitive interface and advanced features to improve productivity and organization.

Work experience

  1. Frontend Developer at Valsea

    As a Frontend Developer at Valsea, I work on maintaining and evolving the main application, combining product development, bug fixing, CMS integrations, and automation-focused tooling.

    • Maintained and improved the frontend using React and TypeScript.
    • Implemented new features and UI improvements across the main application.
    • Worked with Sanity CMS and proxy-based integrations to support dynamic content and application workflows.
    • Designed skills and automation protocols using agentic programming practices.
    • Created internal tools to make the main application easier to control, develop, and maintain.
    • Collaborated closely with the team to diagnose bugs, deliver fixes, and improve the overall development process.
    About Valsea

  2. Frontend Developer & web3 at NumberGroup

    As a Frontend Developer at NumberGroup, I´ve been collaborating to add new features and port to v2.

    • Developed and maintained UI using React.js (v18), TypeScript (v5.3.2), and Styled-Components (v6.1.1).
    • Implemented state management using Zustand (v4.5.2).
    • Handled asynchronous data with React Query (v4.3.0) and Axios (v1.7.3).
    • Integrated web3 functionality using Wagmi (v2.14.16) and Viem (v2.25.0).
    • Managed version control and collaboration using Git GitHub and Jira.
    • Worked closely with cross-functional teams to deliver high-quality software.
    • Maintained code quality and followed industry best practices.
    About NumberGroup

  3. Frontend Engineer at YoloRekt

    As a Frontend Developer at YoloReck, I over see the complete development workflow-from implementing Ul designs to deploying applications using AWS Amplify.

    • Led the development of UI using React.js (v18), TypeScript v(5.3) and CSS module.
    • Managed application state with Jotai/Atom (v2.x).
    • Ensured real-time data updates using Socket.io (v4.7).
    • Using Jest (28.x), Vitest (v2.x), React Testing Library (v14.0.0) and Cypress (v12).
    • Managed version control and collaboration using Git GitHub, Trello, Slack-canvas.
    • Oversaw the deployment process using AWS Amplify.
    • Collaborated with designers to implement UI/UX designs.

  4. Frontend Developer at SpankChain

    I was part of a frontend development team, handling tasks such as component modifications, implementing new business logic, and fixing bugs, all within an agile environment.

    • Developed and maintained UI using React.js (v16.13), TypeScript (v3.8) and Styled-components (v5.2.1).
    • Implemented state management with React Context.
    • handled asynchronous data using Axios (v0.21).
    • Participated in the design and implementation of new features and business logic.
    • Worked within an agile team, contributing to sprint planning and retrospectives.
    • Optimized frontend performance and ensured cross-browser compatibility.

  5. Fullstack web developer at Syscoin (Blockchain Foundry)

    I was part of the founding development team, where I built the landing page, contributed to an Angular-based marketplace, designed the wallet interface, and automated blockchain node deployment.

    • Developed and maintained the landing page using React.js (v16.8) and CSS.
    • Assisted in the development of a marketplace using Angular (v7.x).
    • Designed and implemented the wallet UI with React.js.
    • Automated blockchain node deployment using Jenkins and Terraform.
    • Collaborated with cross-functional teams to deliver high-quality software.
    • Ensured code quality through code reviews and testing.
    • Actively participated in agile workflows including sprint planning, reviews, and retrospectives.

  6. Frontend developer at Thrifa

    I lead the development team responsible for building web applications centered on blockchain technology and cryptocurrencies. Our tech stack includes React.js and Angular for the Ul, with CSS and Styled-components for

    • Led the development of web applications using React.js (v15.6) and Angular (v5.x).
    • Implemented UI designs using CSS and Styled-components (v2.x).
    • Managed state with Redux (v3.7.x) and Context.
    • Handled asynchronous data with Axios (v0.18).
    • Collaborated with backend developers to integrate APIs.

Let's talk?