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