Johan Vargas

I’m a Frontend Developer focused on building clean, accessible, and responsive web applications using React, JavaScript, and Flutter. I enjoy solving real problems through practical design and code, and I'm always looking to grow through new challenges

Devnest Innova FrontEnd Developer 
● Designed and developed the frontend of a document management web application (SST) using Flutter, integrating Provider (state management), http (Dart) for API consumption (GET/POST), dependency injection, and Local Storage. 
● Configured navigation with GoRouter and collaborated with the backend team to integrate endpoints and optimize data flows. 
● Built two landing pages (company and application) using React, JavaScript, Vite, Tailwind CSS, and EmailJS, with responsive design and functional contact forms.
 ● Contributed to key technical decisions to ensure a smooth user experience and reusable components. 
Sasoftco (South America Software Company) Python & Javascript Developer (Intership) 
 ● Collaborated on the integration of an AI model with Detectron2 for automated material counting, consumed through a FastAPI endpoint (POST request receiving images and returning annotations). 
● Developed an interactive JavaScript canvas that allowed users to manually correct model predictions, increasing final accuracy 
● Helped reduce manual counting time by up to 80%, integrating the solution into mobile and desktop applications 
Freelance Developer FrontEnd Developer (Flutter) 
 ● Built a basic delivery tracking web app using Flutter, with a responsive design and two main screens (code entry and delivery progress visualization). 
● Implemented dynamic data updates and screen navigation using Navigator, improving user experience on both mobile and desktop devices.

Electronic engineer degree at Universidad de los Llanos in Colombia